How to calculate the mean of a subset of the full dataset?

I have a dataset that I have compiled but i want to calculate the mean call rate for a subset of the data (Individuals 1-3) using the audio start time and stop time. how would I go about just using the subset of the data and also calculating the mean? I have provided a screenshot of the dataset.

[dpb]

Attach the data itself...

Look a grouping variables and rowfun...

[Siddharth Satishchandran]

would rowfun allow me to also calculate the mean call rate of the subset of data?

[dpb]

With grouping variable, yes...

Answer 1

[Sulaymon Eshkabilov]

Use mean(), e.g:

 mean(A, 1)   % Columnwise
  mean(A, 2)  % Rowwise

Answer 2

[Siddharth Satishchandran]

Ok thanks! So for example, the screenshot I sent the mean call rate for the first inividual would be mean (dataset A, value for audiostop) or is it mean value for audio start, value for audiostop)?