How to count values in a script?
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Hi. I am writing a script in which agents (say 200 agents) make 3 decisions: A, B, and C. Now, I want to be able to find out how many As, Bs, and Cs are there. How do I do this? Thank you.
回答（2 个）
Star Strider
2016-1-17
0 个投票
I would use the sum function.
2 个评论
Aci
2016-1-20
Star Strider
2016-1-20
My pleasure.
If they are in a matrix, perhaps (Nx3) with a different columns for ‘A’, ‘B’, and ‘C’ (which is likely how I would do it), then sum will sum each column (or row, if you ask it to). Without knowing how your data are organised, it’s difficult to provide an exact solution.
Chad Greene
2016-1-20
You can indeed use sum if you design your script for it. I'm gonna simplify the problem and consider this case with three agents and two choices:
% Give each agent a number, 1 through 3:
agent = 1:3;
If Agent 1 chooses A and B, Agent 2 chooses A only and Agent 3 chooses B only:
A = [1 1 0];
B = [1 0 1];
What's the total number of agents who chose A?
sum(A)
= 2
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