Answered
I am trying to create a loop that will be able to automatically follow a certain order of operations.
>> C = {'TP','TP','TP','TP','NaN','NaN','Px'}; >> [~,idx] = sort(strcmpi(C,'NaN')) idx = 1 2 3 4 7 5 6 and th...

6 years ago | 1

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Answered
create vector from each element it had
Method one: nonzeros: vec = [x,y,z]; tmp = 1:max(vec); new = nonzeros((tmp(:)<=vec).*tmp(:)).' % requires >=R2016b Method tw...

6 years ago | 0

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Answered
regexp to return folders
Why not just specify the name format to only return names that start with 'sub-', e.g.: S = dir(fullfile(parent_path,'sub-*'));...

6 years ago | 1

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Answered
How to load files in numerical order?
One simple way is to download my FEX submission natsortfiles: https://www.mathworks.com/matlabcentral/fileexchange/47434-natura...

6 years ago | 1

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Answered
Use string or character arrays in code?
"Which is preferred and why?" In my opinion character arrays and string arrays have quite different applications, even though p...

6 years ago | 1

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Answered
Making two data appear side-to-side
Try this: fprintf('%2.4f\t%2.4f\n',[array(:),Sw_C(:)].')

6 years ago | 1

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Answered
Values not getting printed in csv file
"Values not getting printed in csv file" Actually they are getting printed, your code just keep overwriting them. The problem i...

6 years ago | 0

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Answered
How delete duplicate strings in cell array
You could easily hide the loop inside cellfun, e.g.: >> fun = @(c)sprintf(' %u',unique(sscanf(sprintf(' %s',c{:}),'%f'))); >> ...

6 years ago | 0

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Answered
Sum Of Series variables from Vector.
Why not just use a loop?: Q = [1,2;3,4]; R = 5; z = [1;1;3;0;0;5;7;2;0]; % X = [z(1:3:end),z(2:3:end)].'; U = z(3:3:end)....

6 years ago | 0

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Answered
How to read line with multiple separate headers and tabs in between values
Importing the matrix data as numeric is much easier: opt = {'CollectOutput',true}; [fid,msg] = fopen('sample.txt','rt'); asse...

6 years ago | 0

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saving variables programmatically using list of variable names
The simple solution is to use a comma-separated list: varNames = {'a','b','c'}; save('myMatFile',varNames{:}) % ...

6 years ago | 1

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Answered
Separating and sorting a character string of magnetometer data (X,Y,Z,temperature) into separate arrays of doubles
>> str = 'X-123.3 Y30.3 Z500.4 t24.5'; >> tkn = regexpi(str,'([A-Z]+)(\S+)','tokens'); >> tkn = vertcat(tkn{:}) tkn = '...

6 years ago | 0

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Answered
Longest Run Tosses Matlab
Simpler and more efficient: >> N = 17; % number of tosses >> V = randi(2,1,N) % 1=tails 2=heads V = 2 1 2 2 2 2...

6 years ago | 0

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why interp2 report "input grid is not a valid meshgrid" since input grid is generated by meshgrid?
"If anyone knows this issue..." Explanation: you swapped around the order of the variables: [Z,Y] = meshgrid(za,ya); % order: ...

6 years ago | 3

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Error using sscanf Invalid format.
The sscanf documentation explains its syntax as "A = sscanf(str,formatSpec) reads data from str, converts it according to the fo...

6 years ago | 0

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Answered
Error using fread Invalid file identifier. Use fopen to generate a valid file identifier.
The problem is that your code only uses the filename, but you need to also provide the filepath (otherwise how does MATLAB know ...

6 years ago | 0

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Answered
MATLAB Colormap doesn't work past 12 colors
" when there are 14 colors in the map, even if the extra two are unused..." That depends on what you are doing. Depending on t...

6 years ago | 1

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Matching unequal cell arrays
Using tables: >> TA = cell2table(A(:)) TA = Var1 ____ 124 252 252 1252 225 225 ...

6 years ago | 0

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Assign a number of random elements to different variables?
Using one cell array is much better than having lots of separate variables, so that is what this answer does. >> v = randperm(4...

6 years ago | 1

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Nested tables with duplicate sub-column names?
The link you gave is unrelated to nested tables: the goal there was to (in some way) merge multiple tables into one table. It i...

6 years ago | 2

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Answered
Average of multiple cell arrays
Assuming that each cell contains a 1x22051 vector (i.e. they are all the same size): avg_ydft = mean(cat(3,ydft{:}),3) https:/...

6 years ago | 0

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Answered
How to sum the second position data in an array (50000x2) with the same value in the first position
Method one: accumarray: >> [U,~,G] = uniquetol(A(:,1)); >> S = accumarray(G(:),A(:,2)); >> M = [U,S] M = 2.79314 0.141...

6 years ago | 0

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Answered
read csv. convert char-array to matrix
Because MATLAB does not handle UCS-2 file I first converted your file to UTF-8 (attached). This imports all of the main matrix ...

6 years ago | 0

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Help with printing output
Instead of adding spaces manually you can set the fieldwidth: hours = [13,22,41]; x = [74.52,30.02,22.68]; y = [77.40,36.30,2...

6 years ago | 0

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Answered
Access all k-th elements of a n-dimensional array, where the k indexes are defined in a (n-1)-dimensional array.
>> S = size(A); >> [R,C,~] = ndgrid(1:S(1),1:S(2),1); >> X = sub2ind(S,R,C,idx); >> B = A(X) B = 1 11 3 13 ...

6 years ago | 0

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Answered
For loop using bin2dec conversion
This is MATLAB, you don't need a for loop! Method one: mtimes: >> V = [1,1,0,1,0,0,1,0]; >> N = 2; >> X = pow2(N-1:-1:0)*res...

6 years ago | 0

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Answered
Matrix Generation from Other Matrices
F = @(p)C*A^p*B; M = arrayfun(F,0:n-1,'uni',0); M = cumsum(cat(3,M{:}),3); M = reshape(permute(M,[1,3,2]),[],b); Tested: >>...

6 years ago | 0

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Answered
Replacing NaN's in column of a Matrix
Where M is your matrix: X = isnan(M(:,2)); M(X,2) = 250;

6 years ago | 1

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Answered
For loop goes longer than expected.
"Can you help me what is the cause for this behaviour?" Because that is the indexing that you used. You defined the loop itera...

6 years ago | 0

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Answered
Average of the nine surrounding cells
Use conv2 to calculate the averages, e.g.: out = matrix2.*conv2(matrix1,ones(3,3),'same')/9;

6 years ago | 1

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