If you post this one-liner, why not make it a function?
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% % Program No:1
% Matlab functions for the following
% a)Read an image
% b)Copy the image to another file
% c)Get the image information
% d)Find the compression ratio for the copied image
f=imread('crystal.jpg');
imwrite(f,'crystal1.jpg');
k=imfinfo('crystal.jpg');
ib=k.Width*k.Height*k.BitDepth/8;
cb=k.FileSize;
cr=ib/cb
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