Extra commas when using fprintf

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Oscar Tsang
Oscar Tsang 2019-12-6
回答： Guillaume 2019-12-7
Well, my problem is that within the for loop im printing the number of iterartions and the old means using fprintf. The only problem is that it adds a extra comma to the end of the old means when its not needed. I have treid to google the solution, still can't find an answer. Below is the code when i print the iterations and the old means.
I have also attached a picture of what it looks like.
for i =1:I
% print out iterations
fprintf("\n Iterations: %d \n",i );
fprintf(" Old Means: ");
fprintf("(");
fprintf("%.4f," ,M(:,:,i));
fprintf(")");
% fprintf("\n Clusters: (%d,%d,%d,%d,%d,%d,%d,%d,)" ,C());
% fprintf("\n New means: \n")
%
% fprintf(" Old Means: %.4f,%.4f,%.4f,%.4f,%.4f \n ",M(:,:,:));
end

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采纳的回答

Guillaume
Guillaume 2019-12-7
Personally, I'd use:
fprintf(" Old Means: (%s)", strjoin(compose('%.4f', M(:, :, i)), ','));

更多回答（1 个）

Walter Roberson
Walter Roberson 2019-12-7
Replace
fprintf("%.4f," ,M(:,:,i));
With
Temp = M(:, :, i) ;
fprintf("%.4f," ,Temp(1:end-1) );
fprintf("%.4f", Temp(end)) ;
There are other approaches, such as computing the format according to the data size with repmat, and zapping the final comma before using the format.

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