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m-Files are appropriately named as they refer to any file with suffix
.m
. They can be used to define scripts and functions.
If you save a sequence of commands to a file
name.m
, then whenever you type:
>> name
is the same as if you had entered in all the lines of the file
is the same as if you had entered in all the lines of the file
name.m
at the command line.
This can be used to perform repetitive tasks, such as creating the matrix for a simple linear regression. For example, save the following to a file
lr.m
:
A = [x, ones(size(x))];
c = A \ y
Then, if in Matlab you type:
c = A \ y
Then, if in Matlab you type:
>> x = (1:10)’;
>> y = [1.30 2.39 3.46 4.36 5.08 6.20 7.46 8.45 9.20 10.44]’;
>> lr
>> y = [1.30 2.39 3.46 4.36 5.08 6.20 7.46 8.45 9.20 10.44]’;
>> lr