MATLAB: Calling different file names and plotting them

#contour #for-loopMATLAB

I want to do contour plotting from my available 3D co-ordinates. I have a total of 11 .mat files which stores datas of 3D co-ordinates.
I have named the different files name as G1.mat,G2.mat,……..,G11.mat. I want to use for loop to contour plot all the 11 datas. Can i be able to increase file name as G1 to G2 and finally G11?
Please correct me if the method is feasible or not.