How to plot several functions with its own different set of data in one plot

Lets say I have a set of data in .CSV format and I have a script that will merge this data. Then I have a couple of functions that would apply a correction factor from one data to another creating a new set of corrected data. However this correction can only be defined for a specific component dimensions. I have other sets of data but the dimensions are different.

How can I plot the different plots from each function for the different set of data with different dimensions in one plot simultaneously? I have 3 matlab files, one is a scrip that reads and merge the data and the other 2 matlab files are functions.

one of the function to be able to plot starts like this:

f-applyff(data,'name of file 1', number, [],0,'om')

but before I can apply this function I must load(nameoffile1)

if apply this function command in the command window then I will get only one plot for a specific data set. But If i have nameoffile1, nameoffile2 and nameoffile3? how could I load all 3 so that I can apply the function for all of them to plot simultaneously?