To save values in an array

The most common way is usage of for loop and for 10 values, it will be really fast.

Do this:

Tpsnr=zeros(1,length(srcFiles));
for k=2:length(srcFiles)
   peaksnr = psnr(C,I);
   fprintf('\n The peak-snr value is %0.4f\n', peaksnr);
   Tpsnr(k)=(Tpsnr(k-1)+peaksnr);
end
Apsnr = mean(Tpsnr(Tpsnr~=0),2)