MATLAB: There is no space after the equal sign? (fprintf)

fprintfMATLAB

fprintf('%s \n',strcat('s',' = ','1000',';'));

Output:

s =1000;

Desired:

s = 1000;

Best Answer

"Why there is no space after the equal sign?"

It has nothing to do with fprintf. As the strcat clearly states, strcat removes whitespace characters from the end of char vectors: "For character array inputs, strcat removes trailing ASCII white-space characters". If you want to keep the space characters, put it into a scalar cell array, like this:

{' = '}

But really you would be much better off just writing a proper format string for fprintf, rather than using both strcat and fprintf.

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MATLAB: Displaying matrix in .txt file (fprintf)

Just tweaked you code itself a little bit:

fileID=fopen('MyFile.txt','w'); % Open text file for writing
 for k=1:3
        fprintf(fileID,' |%.2f%+.2fi            %10.2f%+.2fi            %10.2f%+.2fi            %10.2f%+.2fi|\r\n',[real(A(k,:));imag(A(k,:))]);
 end
 fprintf(fileID,' |%.2f%+.2fi            %10.2f%+.2fi           %10.2f%+.2fi           %10.2f%+.2fi|\r\n',[real(A(4,:));imag(A(4,:))]);
 fprintf(fileID, '\r\n\r\n\r\n');
fclose(fileID); % Close the file

Gives:

MATLAB: Isn’t strtrim working on the string

Your whitespace might be "significant", as mentioned in the documentation for strtrim.

For example, if you do

s = [char(160) 'abcd']
strtrim(s)

then the strtrim command will have no effect.

What do you get for these whitespace characters if you type

double(s)

where s is your string?

You could use regexprep to get rid of significant whitespace:

s = regexprep(s,char(160),'')

You'll need to take care of not removing those special characters from other places.

Best Answer

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MATLAB: Displaying matrix in .txt file (fprintf)

MATLAB: Isn’t strtrim working on the string

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