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How to save local variables (which are within a called function)
"...there are some variables (calculated inside the function @ODE_System) and i would like to see and save their values along wi...

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How to do matrix Preallocation?
"what am i doing wrong?" You are concatenating the new data onto the bottom of your preallocated matrix, rather than using inde...

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what does a = T(m:m, 'label'); mean?
"what does a = T(m:m, 'label'); mean?" It refers to row m of variable/column "label" of the table T, returning a table: https:...

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A query relating a function with 3 input arguments.
"Why is the answer '-21' and not '-9'?" Because this code x>y>z is parsed from left to right as (x>y)>z which (because true...

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Functional programming construct to expand cell array into arguments for other functions without using an intermediate variable in the (user) code?
The closest is to use the new syntax which allows dot indexing directly into function outputs: https://www.mathworks.com/help/m...

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Constructing names of array and structure variables
"I'm trying to dynamically create variable names, for array and struc variables" But your example shows you changing a structur...

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Regular expression: how to search for a sequence of one number alternated with 0s?
S = '5ad3515505546151g545460000051333300342511324sgfb15654404440044532152331450005534563asdf4453415364043344004044453'; C = reg...

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Split comma seperated values inside a cell in to multiple columns
Simpler and more efficient: % load your data: S = load('split_mat.mat'); C = S.split_mat; % convert to numeric: F = @(t)ssc...

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How to remove all the rows containing a substring from a table?
Simple and efficient MATLAB approach: A = [0;1;2;3;4]; B = ["cat";"hat";"sat_Downstream";"fat";"rat_Downstream"]; C = [5;6;7;...

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Problem using textscan multiple times for one file
"How can I solve this problem?" After calling TEXTSCAN the first time the file pointer will be at (or near) the end of the file...

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Replace NaN with median per column
M = randi(3,5,7); M(randi(numel(M),1,9)) = NaN V = median(M,1,'omitnan') X = isnan(M); M(X) = repelem(V,sum(X,1))

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How i can combine three or more than three matrix?
Note that you will run out of memory very quickly as you increase the number of matrices. format compact inp = {rand(3,4),rand...

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'Merge' two cell arrays into one single cell array (NOT concatenation!)
c1 = {[1;2],5} c2 = {[3;4],[6;7;8;9;10]} out = cellfun(@vertcat,c1,c2,'uni',0) celldisp(out)

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How I can create this matrix?
X = A(:,5)<1; A(X,:) = []

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return matrix rows and columns using a one-to-one mapped vector for rows and vector for column
Use sub2ind: idx = sub2ind(size(A),pnRowsToSelect,pnColsToSelect); out = A(idx)

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Convert Time Given in Seconds to Minute, Seconds, Milliseconds
If you really need minutes (i.e. and not roll-over to hours for >59 minutes) then you can calculate this yourself, e.g.: inp = ...

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replace specific commas using strrep
"I converted my data... using str2num." Although your descriptiion is unclear, I guess that your goal to convert text data into...

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How can I create this matrix?
n = 5; r = 2:5; F = @(k)any(permute(nchoosek(1:n,k),[3,1,2])==(1:n).',3); M = cell2mat(arrayfun(F,r,'uni',0))

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Effective matrix defining (diagonals)
N = 7; M = toeplitz([-2,1,zeros(1,N-2)])

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Remove String and extract numbers to move to new column
S = [... "[0, 0]" "[0, 5]" "[5, 115]" "[115, 219]" "[219, 262]" "[262, 328]" "[328, 408]" "[408, 424]" "[424, 531]" "[...

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Help with regexp to extract data
tdata = {'W1W','W1W 7','W1W 8','AZ_85262','CA_90032','CA_90045'}; tkn = regexp(tdata,'^(.*?)_?([^_]*)\$','tokens','once'); tkn ...

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complicated formatted text with textscan
I removed the extra line of numbers from block 3, the modified data file is attached. This code imports the modified data file:...

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How to cut multiple file ans past it to folder?

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Using cell array for indexing
No need for a loop, here is the simple and efficient MATLAB approach: IndArray = {i1,..,im}; IndArray(1+end:ndims(A)) = {':'};...

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How to organize an array (x_i,y_j,z) such that (x_i,y_i)=z?
The trick is to use https://www.mathworks.com/help/matlab/ref/sub2ind.html A = [1,1,2;1,2,0.5;2,1,0.5;2,2,1] S = max(A(:,1:2),...

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Numeric to Ordinal-String
Convert numeric values to a string array of integers with ordinal suffixes. Fully vectorized!

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why "writetable" replaces points with commas ???
"why "writetable" replaces points with commas ???" It doesn't. The Open Office XML format (e.g. XLSX) uses only the decimal po...

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'123' to 123
A = '123' A = str2double(A)

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Indexing a variable in a cell array?
strcmpi(txt2,date) But... you should be using READTABLE to import that file data, and handle those dates as DATETIME, not as ...

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Add variables calculated in a for loop into an array
I suspect that you need something like this: nml = numel(numbers); out = nan(nml,1); for k = 1:nml out(k) = calculate(nu...

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