MATLAB Answers

# How to choose subset of cell arrays?

57 views (last 30 days)
Tintin Milou on 21 Feb 2015
Commented: per isakson on 21 Feb 2015
Hi all,
I have the following problem: I have 30 experiments and would like to plot them several graphs. The user should be able to decide which experiments to plot on the same graph and which on different ones. For that I introduced a cell array, e.g.
plotselect = {[2 5],[4]}
Here, experiments 2 and 5 shall be plotted on the same graph, whereas experiment 4 shall be plotted on a second graph. I also allow the user to choose which experiments (out of 30) to run in the first place.
expselect = [1:4];
That runs the first four experiments. As you can see, the user might want to run more experiments than what he's actually going to plot. But the values in plotselect must be a subset of expselect. How can I retrieve the values in plotselect that are also in expselect? That is, I'd like to get
plotselect = {[2],[4]}
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Accepted Answer

Guillaume on 21 Feb 2015
As per's answer, you need to use intersect. A cellfun lets you keep the original structure of your plotselect:
plotselect = {[2 3 5], [3 4 6], 2};
expselect = 1:4;
plotselect = cellfun(@(v) intersect(v, expselect), plotselect, 'UniformOutput', false)
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### More Answers (1)

per isakson on 21 Feb 2015
Edited: per isakson on 21 Feb 2015
Hint:
>> intersect( expselect, cell2mat( plotselect ) )
ans =
2 4
>>
This assumes that all cells in plotselect contain numerical rows or scalars.
After a second reading of the question
>> num2cell( intersect( expselect, cell2mat( plotselect ) ) )
ans =
[2] [4]
>>
##### 2 CommentsShowHide 1 older comment
per isakson on 21 Feb 2015
Yes!

Sign in to comment.

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!