MATLAB Answers

find a value & store in new variable

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Ubu
Ubu on 7 Mar 2012
Hi,
Standard question:
We have a cell array A cell with integer and decimal numeric values:
A = {[1;2;29;2],[3;4;0.3;3]}
(this is just an example, of course)
We would like to find all occurrences of [2] in column 1, and save corresponded value in column 2 in a new variable "new_variable". In this case "new_variable" would contain [4] and [3], and we could make statistics on this new variable alone, without bothering about the rest.
find(ismember(A{1,1},[2]))
would of course just give us the row coordinates of column 1.
Any suggestion?
Thank you very much!

Accepted Answer

TAB
TAB on 7 Mar 2012
new_variable = A{2}(find(ismember(A{1,1},[2])))

More Answers (2)

Jan
Jan on 7 Mar 2012
It might be easier to use a matrix instead of a cell. But it works with your data representation also:
index = A{1} == 2;
new_variable = A{2}(index);
Or in one line:
new_variable = A{2}(A{1} == 2);
find and ismember are not needed here.
  1 Comment
Ubu
Ubu on 19 Mar 2012
Hi Jan,
maybe you want to have a look at this, indeed.
Cheers,
Udiubu

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Ubu
Ubu on 7 Mar 2012
Both work!
Thanks TAB, Thanks Jan.

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