using someone else's code on my dataset

I have received a complicated code and would like to use it on my dataset. How do I uplaod the data and use the code I have in the codefile to run on the data? the data is streamflow time series.

[Jan]

The question is too vague to be answered.

[KSSV]

The code should have help documentation via comments if you are lucky enough. You can read those comments and use it. If there are no comments, you should have knowledge of your problem and coding in MATLAB.

[Steven Lord]

If there is no documentation and you cannot determine how to use the code, you probably want to ask the person who sent you the code and/or the author of the code for help.