How to set the name with num2str in for loop?

Hi!

I run the c code and have a number of .dat file.

% cp_1.dat, cp_2.dat and so on.

I want to import and make some results using them.

But I'm not able to use it.

My code is below:

for k = 1:1000
    load(['cp_',num2str(k),'.dat']);
    A = ['cp_',num2str(k)]; %%%%%%%%%%%% The problem!!!
    
    if k==1
        B = zeros(size(A));
    end
    
    % This loop shifts the array.
    for i = 1:7
        ii = abs(i-8);
        A(i+14,:) = A(ii,:);
        A(i+21,:) = A(ii,:);
    end
    A(length(a)+1,:) = A(1,:);
    
    B(:,:) = B(:,:)+A(:,:)
end

I hope you understand my aim.

Best,

Sopo

[Stephen23]

Most likely you should be using READMATRIX or READTABLE or similar, rather than outdated LOAD for importing textfiles:

F = sprintf('cp_%d.dat',k);
A = readmatrix(F);

[Sopo Yoon]

When I use a command 'readmatrix' instead of 'load', I get a error :

Undefined function or variable 'readmatrix'.

Error in Cp (line 14)
A = readmatrix(F);

[Stephen23]

"When I use a command 'readmatrix' instead of 'load', I get a error"

Because you did not fill out the Release field it is assumed that you have a recent release. But apparently you do not.

Try using DLMREAD or CSVREAD or whatever your installed MATLAB version supports.

Answer 1

[Bjorn Gustavsson]

Perhaps it is as simple as:

for k = 1:1000
    % assign the content of the file directly to variable A:
    A = load(['cp_',num2str(k),'.dat']);
    
    if k==1
        B = zeros(size(A));
    end
    
    % This loop shifts the array.
    for i = 1:7
        ii = abs(i-8);
        A(i+14,:) = A(ii,:);
        A(i+21,:) = A(ii,:);
    end
    A(length(a)+1,:) = A(1,:);
    
    B(:,:) = B(:,:)+A(:,:)
end

This will obviously rely on the files containing similar enough data, but that would have applied even for your solution.

HTH

[Sopo Yoon]

Thanks to you, I can use a right variable.

Best,

Sopo