Grouping sessions by participant number

Hi there,

I have a 84x1 vector which contains 84 unique session numbers for an experiment. Each session is associated with a specific participant. Each session contains 4 blocks of 50 trials. I have a 8x1 vector of unique participant numbers. Each participant should complete 12 sessions (with the exception of a few who didn't complete the full experiment).

My question is, how do I associate specific session numbers with specific subject numbers so that I can plot a single subject's distribution of responses per each individual session?

Thank you in advance for any help.

[dpb]

Show us a small representative data set...it's so much easier to parse a description if there's an example to go along with it... :) Clearly doesn't need to be all 84 nor the blocks nearly so large; algorithms aren't dependent on size, just the relationships.

Answer 1

[Image Analyst]

Why can't you just make up a 2-D array with 84 rows and 202 columns. First column is the session number, second column is the participant ID number, and columns 2 - 202 are the 200 numbers in 4 blocks of 50. I.e, cols 3 - 52 contain block 1, cols 52 - 102 are block 2, cols 103 - 152 are block 3, and the last 50 columns are block 4.