performing matrix subtraction between two excel file

Hello

I have two separate excel files,each containing 125 x 125 array, I would like to do matrix substraction between the first colum of excel file 1 to the first colum of excel file 2 and do this for every column. How to do this ? Any suggestiions

data1=readtable('filename1.csv');

data2=readtable('filename2.csv');

[dpb]

What's wrong with

delta=data2.Var1-data1.Var1;

?

If it is just an array in the two files, a table is probably overkill and you'd be better served to use readmatrix instead.

But, we don't know anything more about the file content -- is there a header line, for example?