Subtracting Vector from a Matrix
Matlab can subtract vectors from matrices automatically since R2016b - so called "auto expanding". Do you use an older version? ...

9 months ago | 0

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Include global variable declaration infunctions
Global variables are a shot in your knee in every case. Hiding them in scripts, which are called dynamically, impedes the debugg...

9 months ago | 0

deleted old version of Matlab (R2017b) keeps getting back
See https://nektony.com/how-to/uninstall-matlab-mac According to https://www.mathworks.com/help/install/ug/uninstall-mathworks-...

9 months ago | 1

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I found this bellow code in internet. While I run the code I noticed following errors.
This is a strange and inefficient code. Replace e.g. for i=1:len for j= 2:2 text_names(i,j)=txt(i,j); end ...

9 months ago | 0

Vectorise or Parallel Computing
This loop cannot be parallelized. If flux_edge is a vector and not a matrix, accumarray would solve the problem efficiently. Try...

9 months ago | 0

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How do I return an extra parameter using Matlab's ODE solvers?
If the problems mentioned in my comment are fixed, the solution is easy: Run the integration at first. Then provide the calcualt...

9 months ago | 0

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Assign column index to output value
An easier way to create the submatrix: submatrix = M(i:end, :); The any() operates along the first non-singelton dimension. Fo...

9 months ago | 0

Index exceeds the number of array elements (4)
You stop Matlab at the error already by dbstop if error. Then use the debugger to check the sizes of the arrays: size(zplot) s...

9 months ago | 0

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Problem with Matrix indexing using vector
This is a job for sub2ind: a = blkdiag(ones(3),ones(3)); [r,c] = find(a); b = zeros(size(a)); index = su...

9 months ago | 0

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MEX passing Integer - wrong results
This sounds magic. Whenever magic things appear in discussions in the forum, or at programming in general, it is a secure signal...

9 months ago | 2

how to avoid for loop
A ,ore efficient version of the loop: nb = numel(b) - 1; counts = zeros(1, nb); % Pre-allocation!!! for i = 1:nb co...

9 months ago | 0

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Using matlab to find vectors that are orthogonal to another vector.
Do you mean 2D vectors? v = rand(1, 2) % Any test vector vp = [-v(2), v(1)] dot(v, vp) % Orthogonal means: dot pro...

9 months ago | 0

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11221 212211 212 12 1
Please post an exact copy of the error message in the forum. A rough paraphrasing will hide important details. Thanks. I assume...

9 months ago | 0

faster way to add many large matrix in matlab
The main time is spent in rand() in your example. With using ones() instead, the runtime goes from 0.71 sec to 0.25 sec on my ma...

9 months ago | 0

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Convert CurrentPoint to X and Y Value.
I guess that you do not want the coordinates relative to the figure, but relative to the data in an AXES object. Then: CP = get...

9 months ago | 3

P files cannot be analyzed to find their dependencies. Please add P file dependencies manually
I'd start with a web search: Ask your favorite search engine for "Matlab get dependencies of P file". You will find e.g.: https...

10 months ago | 2

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Query in applying If command
if (abs(G(j)-O(:))<1) The if command needs a scalar condition. Therefore Matlab inserts an all() to evaluate the vector G(j)-O(...

11 months ago | 0

Index in position 1 exceeds array bounds (must not exceed 5).
The variable tab has the dimensions 5 x 10. You try to access the indices [100, 5, 10]. This cannot work. I guess, you want to r...

11 months ago | 0

How to Assign vectors to each dynamic variable name?
Don't do this. See: TUTORIAL: How and why to avoid Eval Hiding an index in the name of variables is a bad idea. Use arrays ins...

11 months ago | 4

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Can I construct a matrix multiplying a scalar and a vector?
No, tis is not a standard multiplication. But you can create k based on i and j: i = 3; j = [4; 5]; % Solution 1: k(:, 2) ...

11 months ago | 1

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How can I maximize a function in Matlab?
Matlab contains some tools for minimization. A maximization does exactlly the same, if you change the sign of the optimization c...

11 months ago | 1

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How do I access a certain directory?
You can define the path of a file to access it: Folder = 'C:\Temp\'; FileList = dir(fullfile(Folder, '*.jpg')); for iFile = 1...

11 months ago | 2

i wanted the slope with respect to time frame
Maybe all you need is to call the gradient(X.') function, where X is the complete matrix?

11 months ago | 1

Efficient way to rename files adding prefix from higher rank folder
% Assuming that the Subject_folder's are contained in D:\Your\Folder\ : BasePath = 'D:\Your\Folder\'; BaseLen = length(BasePa...

11 months ago | 0

Save figure as jpg with 600dpi
saveas('figure.jpg') The first input must be the handle of a figure. print(gcf, 'figure.jpg', '-jpg', '-r600'); There is no '...

11 months ago | 0

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i am not able to debug because my window is not showing the debug points
Did you try to create the debug points by clicking in the area behind the line numbers? The file has not been saved. So save it...

11 months ago | 0

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How to shorten space between space in command window
Avoid the \t for formatting the output if you want to get nice ASCII tables. Prefer to define the width: fprintf('%s%10d%10d%10...

11 months ago | 0

If else Statement in GUI
I guess, that Matlab does exactly what it is expected to do. If h(a)*h(b)>0 is false, Matlab enters the else branch. Although y...

11 months ago | 0

how to resolve this "not enough input arguments" from the code shown below
objFun=@(mag)summ Now calling objFun calls summ without input arguments. I assume, you mean: objFun = @summ which is a more e...

11 months ago | 0