MATLAB: Group and individual means

Question

I have a dataset of kinematic angular values. Each row representing 100 datapoints of angular data (Y). I have a column vector containing my subject numbers (1-9) and another column vector indicating three different conditions (A).

I am able to calculate the group mean for each

YS1 = Y(Sub==1)

SubMean = mean (Y1S)

(All conditions, 1 subject)

Same for condition mean

YA1 = Y(A==1)

SubMean = mean (YA1)

(All subjects, 1 condition)

How can I combine it to to get the mean for 1 subject AND 1 condition – Thus (Sub==1) AND (A==1)

Answer 1

Try this

YSA1 = Y(Sub==1&A==1);
SubMean = mean (YSA1);