Getting Index in position 1 exceeds arrray bound error

I wrote a MATLAB code which will put a black box of 10 pixels width at the center of image but I am getting error which says "Index in position 1 exceeds array bounds error" Here is the code for same   image = imread('image.jpg'); [r,c]=size(image); width=10; color=6; new_image=ones(r,c)*color; new_image=uint8(new_image); for row=1:r for column=1:(c-width)/2 new_image(row,column)=image(row,column); end; for column=(c+width)/2:c new_image(row,column)=image(row,column); end; end; for column=1:c for row=1:(r-width)/2 new_image(row,column)=image(row,column); end; for row=(r+width)/2:c new_image(row,column)=image(row,column); end; end; imshow(new_image); And for the logic of the code this code makes a matrix of ones as the size of image pixels and after that I iterate the code from the matrix and adding the pixels value of original image to the new matrix where the box is not present.