Quick way to import data from multiple subjects into one array?

Hi. I extract data (for example 10 time points) from each subject which gets saved into a text file which I am able to import into matlab creating a 10 x 1 array. I want to be able to create an array in which the columns represent each subjects data so that it will automatically (assuming 6 subjects) creates a 10 x 6.

I have the imported text files named like performance_sub1, performance_sub2.. etc... I would like an array just called performance with all 6 subjects in that array.

I assume a for loop is needed, but I don't know how to call the numbers after "sub" in my files.

Any help would be appreciated.

[Star Strider]

See the documentation section on Process a Sequence of Files to start with.