2024 Array indices must be positive integers or logical values - I keep getting issues saying 'Array indices must be positive integers or logical values', regarding the line ' c(1:(length(c)+1)/2)=[];' in my code. Im struggling to resolve this, can anybody hel...

 
Oct 14, 2020 · Why am I getting "Array indices must be positive integers or logical values." Ask Question ... "Array indices must be positive integers or logical values" 0. . Array indices must be positive integers or logical values

Dec 16, 2019 · Array indices must be positive integers or logical values. Follow 13 views (last 30 days) ... array indeces must be positive integers or logical values. That means ... Index in position 1 is invalid. Array indices must be positive integers or logical values.Nov 26, 2022 · Hi all I have the above error, could you please help me to know the problem. THANK YOU. xl=0; xr=1; %domain[xl,xr] ... etivity 2.9 (0.7 pts) he following formulas are commonly used by engineers to predict the lift and drag of an airfoil: L = 0.5pc,sp? here L and D are the lift and drag forces, V is the airspeed, s is the wing span, ρ is the air ensity, and C, and CD are the lift and drag coefficients. Both C, and C, depend on α , the ngle of attack, the angle ... Array indices must be positive integers or logical values. Error in indexing (line 936) R_tilde = builtin ('subsref',L_tilde,Idx); m1= (Dp/p)*x* (3*m+3* (s^2)-mum)+ (9/2)* (x^2)* (s^2)*D2p/p; ode = p- ( (x/ ( (c^3)*sqrt (2)))* (1+m1+mum-r-f)^2); D2ynum = solve (ode==0,D2p); D2ynum = D2ynum (2); f1 = matlabFunction (D2ynum,"Vars", {x, [p Dp]});Why do i get "Array indices must be... Learn more about matrix, covariance matrix . ... Trial>> C=cov(A) Array indices must be positive integers or logical values. 0 Comments. Show -1 older comments Hide -1 older comments. Sign in to comment. Sign in to answer this question.Apr 23, 2018 · Answers (1) interest (1+interest) attempts to index the vector or array interest at location (s) 1+interest . That is not necessarily impossible -- for example if interest = [0 1 2] then 1+interest would be 1 2 3 and interest ( [1 2 3]) would be valid. It is, however, rather suspect. However, I'm getting the following error when exponential is computed with the diagonalised form (E here). "Array indices must be positive integers or logical values." Theme. Copy. A = [1,2,1,3; 3,1,2,0; 2,2,1,4; 1,3,2,1]; [V,D] = eig (A); exp_A = 0; for k = 0:100. exp_A = exp_A + (A^k)/factorial (k);On the right hand side of the == then y will be the entire vector of 18001 variables. After that, t(i) is one individual numeric value, and x_t(t(i)) would be a request to index x_t() at the location given by the numeric value in y(t) -- an indexing that could only work for the one location where y(t) is 1 exactly.I don't know what the value of that expression is because most of those variables are undefined, but given that deltaT is a scalar variable, I would guess that indexing it like that is not what you mean to be doing.The second one, using integer indices and calculating values from there, can produce more precise control values than you might get from using a floating point increment such as for 0:0.1:25 .Learn more about index in position 1 is invalid. array indices must be positive integers or logical values. MATLAB ... Array indices must be positive integers or ...Stock investors consider various factors to determine whether a stock provides sufficient returns for the amount of risk it has. Beta measures the extent to which a stock's value moves with the market. A positive beta indicates that a stock...Without any hesitation the answer to this question is NO. The service we offer is 100% legal, legitimate and won't make you a cheater.I keep getting issues saying 'Array indices must be positive integers or logical values', regarding the line ' c(1:(length(c)+1)/2)=[];' in my code. Im struggling to resolve this, can anybody hel...Array indices must be positive integers or logical values. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021.yes you're correct,but i 'am still facing a problem to put this into code. what my intension is, I want to subtract two matrices which are not of the same order though. my first matrix T is of order 101 by 101 and the other one A is 1001 by 1001 and i want the resultant matrix E_epsilon to be of order 101 by 101.Where you wrote y(y-1), MATLAB thinks you are calling a function, with argument y-1.Instead, you need y.*(y-1).; All of those multiplications should be element-wise rather than matrix multiplications. If you don't know what that means, read this documentation.; You need X and Y here, not x and y.How to solve the "Array indices must be positive integers or logical values" when using optimization toolbox? Hot Network Questions Would a Variac improve the safety of experiments with old tech?That asks to index the vector t at location 1i . However, 1i means sqrt(-1) which is not real-valued and is not a positive integer.solution = 3×1. -1.2424 2.3939 2.8182. det = det (A) det = -198. Can anyone tell me why i keep getting error? Array indices must be positive integers or logical values.indexing the array f using the strictly positive integer index (or logical index) x. evaluation of the function handle f using the value of the variable x. manipulation, in some manner, of the symbolic function f (x) using the symbolic variable x.2. You have apparently created a variable ylim at some point in your code, which has replaced the ylim function in MATLAB. Type clear ylim in your command window and try again. If you still get the same error, inspect your code. You have likely named one of your variable ylim (look for ylim=...). Hi everyone, i hope someone can help.ODE Error: "Array indices must be positive... Learn more about ode errorApr 20, 2020 · 1. This code seems like it should be simple, but for some reason I keep getting this error: "Index in position 2 is invalid. Array indices must be positive integers or logical values." It refers to these lines: Vr = (V*R)/ (sqrt ( (R^2)+ (w*L- (1/ (w*C))^2))); VR (1,i) = Vr; I've tried checking if I entered the equation wrong or if I have to ... Why does the command window say "Array indices must be positive integers or logical values" when this code is executed?Array indices must be positive integers or ... Writing function for Runge Kutta 4th order. ERROR --> Array indices must be positive integers or logical values. command window call is dydx = @(x,y) (1+4*x)*sqrt(y) RungeKutta ... Array indices must be positive integers or logical values. Follow 2 views (last 30 days)Index in position 1 is invalid. Array indices must be positive integers or logical values.Apr 19, 2021 · Array indices must be positive integers or logical values. % (This will output a coefficient in alternating sine,cos for each point) % % First use standard Matlab routine to find Fourier transform of y. % % z contains the complex coefficeints of the Fourier exponential series. % % This section takes the exponential series coefficients and gives ... Array indices must be positive integers or... Learn more about error, index starting at 0, needs to start with 1 . ... Array indices must be positive integers or …4.5: Indexing Errors. An index can be any kind of expression, but the value of the expression has to be a positive integer, and it has to be less than or equal to the length of the vector. If it’s zero or negative, you’ll get an error: >> Y (0) Array indices must be positive integers or logical values.Array indices must be positive integers or... Learn more about array"Why am I getting the error 'Array indices must be positive integers or logical values' in MATLAB when using a for loop?" Theme Copy % grupo 20 Km=1.5; …Select a Web Site. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .num2str of an integer does not have a '.' in it. Eventually you remove all of the characters, at which point size is 0 and end then becomes 0 so a(end) becomes a(0)Select a Web Site. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .Array indices must be positive integers or... Learn more about array, for loopMar 26, 2018 · num2str of an integer does not have a '.' in it. Eventually you remove all of the characters, at which point size is 0 and end then becomes 0 so a(end) becomes a(0) 1 Answer. Please provide a minimal reproducible example. Nevertheless, my guess is that index "k" or "framecito" are starting at value 0 or receiving some non-integer value, when vectors and arrays in MATLALB only have positive integer positions (ie.: Frame (1), Frame (2), Frame (3) or Histograma_acum_norm (1), …Some simple rules for subtracting integers have to do with the negative sign. When two negative integers are subtracted, the result could be either a positive or a negative integer.Mar 13, 2021 · Array indices must be positive integers or logical values. 0 Comments. ... Array indices must be positive integers or logical values. Thukten Tashi on 13 Mar 2021. Array indices must be positive integers or logical values. ... Array indices must be positive integers or logical values. Follow 31 views (last 30 days)I I'm new to matlab and Ikeep getting... Learn more about index, array, integers MATLABHow to solve the "Array indices must be positive integers or logical values" when using optimization toolbox? Hot Network Questions Would a Variac improve the safety of experiments with old tech?The section of code with n(p/0.01) also looks like it might be missing a multiplication operator. If it isn't and you intended p/0.01 to give you an integer value you can use as an index into n, you may encounter difficulties due to floating point arithmetic.Learn more about index in position 1 is invalid. array indices must be positive integers or logical values. MATLAB. Hi, ... Array indices must be positive integers or logical values." This is the script that ... Skip to content. Toggle Main Navigation. Sign In to Your MathWorks Account; My Account; My Community Profile; …Karim on 10 Jul 2022. 1. The following part of you code can produce an error: i starts at 1, hence you are trying to acces t (0) which is not possible. In matlab the indexing starts at 1, hence the first element in the array t will be t (1) Theme. Copy. for i = 1:k. ... z1 = z1+t (i-1);Array indices must be positive integers or logical values. 0 Comments. Show -1 older comments Hide -1 older comments. Sign in to comment. Sign in to answer this question. Answers (1) Cris LaPierre on 13 Mar 2021. ... Array indices must be positive integers or logical values.Array indices must be positive integers or logical values. Follow 389 views (last 30 days) ... Array indices must be positive integers or logical values.Oct 25, 2021 · Array indices must be positive integers or logical values. ... Array indices must be positive integers or logical values. Follow 31 views (last 30 days) You're using the values in the first column of pts as indices into s. So m0 contains one or more values you can't use as indices. Once you fix that you will notice this line is trying to store 12 values to a single position.The section of code with n(p/0.01) also looks like it might be missing a multiplication operator. If it isn't and you intended p/0.01 to give you an integer value you can use as an index into n, you may encounter difficulties due to floating point arithmetic.Array indices must be positive integers or logical values. Follow 12 views (last 30 days) Show older comments. Zhou Ci on 5 Oct 2021. Vote. 0. Link. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021.Oct 18, 2021 · I am trying to solve an equation by using Runge-Kutta Euler Method. Why do I get "Array indices must be positive integers or logical values." error? %Euler Method %parameters g=9.81; rho=1... Index in position 1 is invalid. Array indices must be positive integers or logical values.Mar 3, 2023 · and there you are using the 2D array as indices -- but because of the mistake in the if test, you failed to reject the case where at least one value was 0 but not all of the values were 0. So you potentially have 0 as a subscript, which is not permitted. Sep 27, 2018 · Index in position 1 is invalid. Array indices must be positive integers or logical values. Matlab "Index in position 1 is invalid.... Learn more about index in position 1 is invalid. array indices must be positive integers or logical values.Array indices must be positive integers or... Learn more about error, if statement, else . ... Array indices must be positive integers or logical values. Follow 4 views (last 30 days) Show older comments. Alonso on 5 Nov 2022. Vote. 0. Link.Index in position 1 is invalid. Array indices... Learn more about indexing, matrix array1 Answer Sorted by: 2 Here is a minimal example demonstrating your problem: for i=1:10 clear jpgfiles=rand (10,1); %some dummy data to replace your actual …Sep 27, 2018 · Index in position 1 is invalid. Array indices must be positive integers or logical values. 1 Answer Sorted by: 2 Here is a minimal example demonstrating your problem: for i=1:10 clear jpgfiles=rand (10,1); %some dummy data to replace your actual code jpgfiles (i); end the clear deletes the variable i which means i is the imaginary unit, not a valid index. Avoid the variable name i, it leads to difficult to debug problems.Array indices must be positive integers or logical values. Follow 6 views (last 30 days) Show older comments. Zhou Ci on 5 Oct 2021. Vote. 0. Link. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021.Answers (1) interest (1+interest) attempts to index the vector or array interest at location (s) 1+interest . That is not necessarily impossible -- for example if interest = [0 1 2] then 1+interest would be 1 2 3 and interest ( [1 2 3]) would be valid. It is, however, rather suspect.Array indices must be positive integers or logical values. Follow 6 views (last 30 days) Show older comments. Zhou Ci on 5 Oct 2021. Vote. 0. Link. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021.Nov 26, 2022 · Hi all I have the above error, could you please help me to know the problem. THANK YOU. xl=0; xr=1; %domain[xl,xr] ... Subway records 9th consecutive quarter of positive sales, reflecting its successful transformation journey and strategic growth. Subway, one of the world’s largest restaurant brands, has reported its ninth consecutive quarter of positive sa...Array indices must be positive integers or ... I keep getting issues saying 'Array indices must be positive integers or logical values', regarding the line ' c(1:(length(c)+1)/2)=[];' in my code. Im struggling to resolve this, ... Array indices must be positive integers or logical values."Array indices must be positive integers or... Learn more about array, economics, integration, mathematics %For this problem write a script file called NC.m that implements %the Newton-Cotes method of integration for an arbitrary function f(x).Array indices must be positive integers or... Learn more about error, cell array, nonlinear, linear, faq . ... Array indices must be positive integers or logical values. Follow 1 view (last 30 days) Show older comments. Matthew Charles on 22 Apr 2020. Vote. 0. Link.You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window.Learn more about array indices must be positive integers or logical . N = zeros(1,20); for ii = 0.01:0.01:2 j = ii*100; N(j) = ii*10; end ... Array indices must be positive integers or logical values. Follow 1 view (last 30 days) Show older comments.Index in position 1 is invalid. Array indices... Learn more about ode45, ode MATLAB and Simulink Student Suite, Symbolic Math Toolbox, Partial Differential Equation ToolboxResolving "Array indices must be positive integers or logical values." : r/matlab. before line 56 do: idx = 1. Then modify line 58 to be results (idx) instead of results (x). Finally before the end of the loop add a line to increment the index: idx = idx + 1. Also you should preallocate the results vector before the loop; just look that up and ...Thanks so much for the help. I'm trying to model the dynamics of the non-regulated construct and the auto-regulated construct. So the equation deg_rate=k*x_nr; needs to have the x_nr because x_nr stands for the number of repressor molecules in the system. Also both t_nr and x_nr are vectors containing time series.Why do i get "Array indices must be... Learn more about matrix, covariance matrix . ... Trial>> C=cov(A) Array indices must be positive integers or logical values. 0 Comments. Show -1 older comments Hide -1 older comments. Sign in to comment. Sign in to answer this question.Integers do not contain decimal values. They are whole numbers. You can make a decimal value an integer using round, ceil, floor, or fix for example.Array indices must be positive integers or... Learn more about neural network, array, cnn, deep learning Deep Learning Toolbox. ... Array indices must be positive integers or logical values. Follow 2 views (last 30 days) Show older comments. tamir bonavida on 22 Feb 2022.Apr 23, 2018 · Answers (1) You should probably recheck your formula to see whether the formula asked for indexing at that point, or asked for multiplication. I am not sure why my code is coming up with this: Array indices must be positive integers or logical values. . 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Nov 13, 2018 · Array indices must be positive integers or logical values. Follow 807 views (last 30 days) ... Array indices must be positive integers or logical values. . Find fedex drop off point

array indices must be positive integers or logical values45 usd in

Stock investors consider various factors to determine whether a stock provides sufficient returns for the amount of risk it has. Beta measures the extent to which a stock's value moves with the market. A positive beta indicates that a stock...Array indices must be positive integers or logical values. Error in indexing (line 936) R_tilde = builtin ('subsref',L_tilde,Idx); m1= (Dp/p)*x* (3*m+3* (s^2)-mum)+ (9/2)* (x^2)* (s^2)*D2p/p; ode = p- ( (x/ ( (c^3)*sqrt (2)))* (1+m1+mum-r-f)^2); D2ynum = solve (ode==0,D2p); D2ynum = D2ynum (2); f1 = matlabFunction (D2ynum,"Vars", {x, [p Dp]});However, as the 1st values of eta1 and eta2 are zero, the rest of the values will also be zero, as the value of term n is directly proportional to the value of term (n-1) (observed from the formula/expression above).Index in position 1 is invalid. Array indices... Learn more about indexing, matrix arrayIndex in position 1 is invalid. Array indices must be positive integers or logical values.Apr 14, 2022 · "Array indices must be positive integers or logical values" 0 How to solve the "Array indices must be positive integers or logical values" when using optimization toolbox? Index in position 1 is invalid. Array indices... Learn more about indexing, matrix arrayI keep getting "Array indices must be... Learn more about array, for end loop . clear;clc x = .993 : 0.01 : 1.283; for n = 1 :1: length(x) f(x) = 7*x(n)^3 - 2*x(n)^2 ... I keep getting "Array indices must be positive integers or logical values." Follow 1 …Array indices must be positive integers or logical values. Error in indexing (line 936) R_tilde = builtin ('subsref',L_tilde,Idx); m1= (Dp/p)*x* (3*m+3* (s^2)-mum)+ (9/2)* (x^2)* (s^2)*D2p/p; ode = p- ( (x/ ( (c^3)*sqrt (2)))* (1+m1+mum-r-f)^2); D2ynum = solve (ode==0,D2p); D2ynum = D2ynum (2); f1 = matlabFunction (D2ynum,"Vars", {x, [p Dp]});Array indices must be positive integers or... Learn more about arrayThe section of code with n(p/0.01) also looks like it might be missing a multiplication operator. If it isn't and you intended p/0.01 to give you an integer value you can use as an index into n, you may encounter difficulties due to floating point arithmetic. Oct 18, 2021 · I am trying to solve an equation by using Runge-Kutta Euler Method. Why do I get "Array indices must be positive integers or logical values." error? %Euler Method %parameters g=9.81; rho=1... num2str of an integer does not have a '.' in it. Eventually you remove all of the characters, at which point size is 0 and end then becomes 0 so a(end) becomes a(0)Why do I get "Array indices must be... Learn more about sym as index???, faq MATLAB. ... Why do I get "Array indices must be positive integers or logical values." error? Seguir 7 visualizaciones (últimos 30 días) Mostrar comentarios más antiguos.1 Answer Sorted by: 0 If you are writing f (z) into matlab it means z index of array f. You need to say r = (1-exp ( (1+v)./z)).* (z./y).*cos (z): v = 3.4; y = 6.9; …speed (T) = -0.073.* (t.^2) + 6.1802.*t + 40.423; end. end. plot (0:0.1:25, speed) The first design pattern can be used even when the values are irregularly spaced or when it is difficult to calculate an index given a value. The control value associated with any one location is always the same because the control values are pre-calculated and ...Why do I get "Array indices must be... Learn more about sym as index???, faq MATLAB. ... Why do I get "Array indices must be positive integers or logical values." error? Seguir 7 visualizaciones (últimos 30 días) Mostrar comentarios más antiguos.Oct 5, 2021 · Array indices must be positive integers or logical values. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021. Without any hesitation the answer to this question is NO. The service we offer is 100% legal, legitimate and won't make you a cheater.Answers (1) interest (1+interest) attempts to index the vector or array interest at location (s) 1+interest . That is not necessarily impossible -- for example if interest = [0 1 2] then 1+interest would be 1 2 3 and interest ( [1 2 3]) would be valid. It is, however, rather suspect.Index in position 1 is invalid. Array indices must be positive integers or logical values.Apr 20, 2020 · 1. This code seems like it should be simple, but for some reason I keep getting this error: "Index in position 2 is invalid. Array indices must be positive integers or logical values." It refers to these lines: Vr = (V*R)/ (sqrt ( (R^2)+ (w*L- (1/ (w*C))^2))); VR (1,i) = Vr; I've tried checking if I entered the equation wrong or if I have to ... Every integer is a rational number. An integer is a whole number, whether positive or negative, including zero. A rational number is any number that is able to be expressed by the term a/b, where both a and b are integers and b is not equal...Every integer is a rational number. An integer is a whole number, whether positive or negative, including zero. A rational number is any number that is able to be expressed by the term a/b, where both a and b are integers and b is not equal...I just copied and pasted your code ( and I cleared the workspace) and the code runs but it just gives back y= [0 0 0 0 0 0 0 ]. Only the first two elements should be 0 (initial y was given as 0 and 2nd y returns as 0) but element 3 should be 0.04, element 4 0.128 then 0.2736 and then 0.48832 for the final element.speed (T) = -0.073.* (t.^2) + 6.1802.*t + 40.423; end. end. plot (0:0.1:25, speed) The first design pattern can be used even when the values are irregularly spaced or when it is difficult to calculate an index given a value. The control value associated with any one location is always the same because the control values are pre-calculated and ...Array indices must be positive integers or... Learn more about array, for loop . My code worked fine before trying to incorporate the for loops. ... Array indices must be positive integers or logical values. Follow 1 view (last 30 days) Show older comments.Array indices must be positive integers or logical values. Follow 233 views (last 30 days) ... Array indices must be positive integers or logical values.Array indices must be positive integers or logical values. ... Array indices must be positive integers or logical values. Star Strider on 6 Oct 2021.Index in position 1 is invalid. Array indices must be positive integers or logical values.Plenty of investors are familiar with the term "value investing," but many may not how to properly apply value investing techniques. The primary tenet of value investing is discovering companies that trade at prices below what a combination...I know what "Array indices must be positive integers or logical values." means, but I dont really understand where is the problem, my integers are 1, 2 and 3, or am I missing something? comments sorted by Best Top New Controversial Q&A Add a CommentArray indices must be positive integers or... Learn more about matrix . ... Array indices must be positive integers or logical values. why? 0 Comments. Show -1 older comments Hide -1 older comments. Sign in to comment. Sign in to answer this question. Accepted Answer .and there you are using the 2D array as indices -- but because of the mistake in the if test, you failed to reject the case where at least one value was 0 but not all of the values were 0. So you potentially have 0 as a subscript, which is not permitted.Array indices must be positive integers or... Learn more about image analysis, exponentiate an image MATLAB, Image Processing Toolbox. ... Array indices must be positive integers or logical values. Follow 1 view (last 30 days) Show older comments. Simba on 9 Aug 2021.The section of code with n(p/0.01) also looks like it might be missing a multiplication operator. If it isn't and you intended p/0.01 to give you an integer value you can use as an index into n, you may encounter difficulties due to floating point arithmetic.At any one point, you have a goal that you use to figure out which direction you would ideally like to go. You test to see if you can go in that direction. If so, you go there and loop back to the next step.Array indices must be positive integers or logical values. Follow 8 views (last 30 days) Show older comments. Raushan 25 minutes ago. Vote. 0. ... Array indices must be positive integers or logical values. 0 Comments. Show -1 older comments Hide -1 older comments. Sign in to comment.solution = 3×1. -1.2424 2.3939 2.8182. det = det (A) det = -198. Can anyone tell me why i keep getting error? Array indices must be positive integers or logical values.Why do I get "Array indices must be... Learn more about array ... Why do I get "Array indices must be positive integers or logical values"? Follow 93 views (last 30 days)Index in position 1 is invalid. Array indices must be positive integers or logical values.Jan 13, 2022 · Select a Web Site. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: . The section of code with n(p/0.01) also looks like it might be missing a multiplication operator. If it isn't and you intended p/0.01 to give you an integer value you can use as an index into n, you may encounter difficulties due to floating point arithmetic.However, as the 1st values of eta1 and eta2 are zero, the rest of the values will also be zero, as the value of term n is directly proportional to the value of term (n-1) (observed from the formula/expression above)."Array indices must be positive integers or... Learn more about array, economics, integration, mathematics %For this problem write a script file called NC.m that implements %the Newton-Cotes method of integration for an arbitrary function f(x).Jul 17, 2020 · Description Array indices must be positive integers or logical values. Error in readlocs (line 348) fileextension = filename(periods(end)+1:end); Error in pop ... Index in position 1 is invalid. Array indices must be positive integers or logical values.Nov 20, 2019 · I just copied and pasted your code ( and I cleared the workspace) and the code runs but it just gives back y= [0 0 0 0 0 0 0 ]. Only the first two elements should be 0 (initial y was given as 0 and 2nd y returns as 0) but element 3 should be 0.04, element 4 0.128 then 0.2736 and then 0.48832 for the final element. I keep getting issues saying 'Array indices must be positive integers or logical values', regarding the line ' c(1:(length(c)+1)/2)=[];' in my code. Im struggling to resolve this, can anybody hel...Sep 27, 2018 · Index in position 1 is invalid. Array indices must be positive integers or logical values. Thanks so much for the help. I'm trying to model the dynamics of the non-regulated construct and the auto-regulated construct. So the equation deg_rate=k*x_nr; needs to have the x_nr because x_nr stands for the number of repressor molecules in the system. Also both t_nr and x_nr are vectors containing time series.Array indices must be positive integers or ... Writing function for Runge Kutta 4th order. ERROR --> Array indices must be positive integers or logical values. command window call is dydx = @(x,y) (1+4*x)*sqrt(y) RungeKutta ... Array indices must be positive integers or logical values. Follow 2 views (last 30 days)etivity 2.9 (0.7 pts) he following formulas are commonly used by engineers to predict the lift and drag of an airfoil: L = 0.5pc,sp? here L and D are the lift and drag forces, V is the airspeed, s is the wing span, ρ is the air ensity, and C, and CD are the lift and drag coefficients. Both C, and C, depend on α , the ngle of attack, the angle ... In programming, writing f(x) = x^2 + 1 would typically be understood as using indexing notation -- that the current numeric value of x is to be looked up, x^2 + 1 calculated, and the result to be stored in vector f indexed at the locations whose offset is in x. But your x (n in your case) values are not integers, and not many programming languages allow …Hi, I have a simple tab-delimited file text which looks like : Month H_Gh H_Dh H_Bn Ta Jan 33 17 55 0.5 Feb 52 29 60 1.4 Mar 97 51 97 5.6 Apr ...I know what "Array indices must be positive integers or logical values." means, but I dont really understand where is the problem, my integers are 1, 2 and 3, or am I missing something? comments sorted by Best Top New Controversial Q&A Add a Comment Your model does not have lags, so you cannot set shocks for period 0, only starting in period 1.It's not that Matlab doesn't know what i is, assuming it's not defined by the user. It's that i takes on the value of the imaginary unit when not otherwise defined.1 Answer Sorted by: 0 If you are writing f (z) into matlab it means z index of array f. You need to say r = (1-exp ( (1+v)./z)).* (z./y).*cos (z): v = 3.4; y = 6.9; …Index in position 1 is invalid. Array indices... Learn more about functions, arrays, matrix MATLABArray indices must be positive integers or logical values." I've even had it print out i is before the if statement just to be sure it was starting out with 1. It is.num2str of an integer does not have a '.' in it. Eventually you remove all of the characters, at which point size is 0 and end then becomes 0 so a(end) becomes a(0)1. This code seems like it should be simple, but for some reason I keep getting this error: "Index in position 2 is invalid. Array indices must be positive integers or logical values." It refers to these lines: Vr = (V*R)/ (sqrt ( (R^2)+ (w*L- (1/ (w*C))^2))); VR (1,i) = Vr; I've tried checking if I entered the equation wrong or if I have to .... 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