How to import multiple files using load function

I am trying to make graphs for an experiment that i did in the lab. i have a text file with the data but there are three iterations of it each with slightly different values.

signal=load('A1.txt');

i am using this to import the text file but if i want to import a total of three others and plot them on the same graphs how do i do it keeping in mind i am using fft further in the code

Answer 1

[madhan ravi]

See Processing sequence of files