Logical Indexing one vector using a second vector

Hi,

I am relatively new to MatLab. I have the following problem. I have a double array in my data named Trial_Index size 50478x1 I also have a myTrialNumbers double array size 154x1.

The Trial_Index array has data in the following form:

Trial_Index = [1 1 1 1 2 2 3 3 3 3 4 5 5 .... n]

The TrialNumbers has data in the following form:

TrialNumbers = [1 2 3 4 5 ....... n]

I need a way to automate the task of generating one seperate logical vector for each element of TrialNumbers where it is found in TrialIndex. So that:

Vector1 = TrialNumbers(1) == Trial_Index If TrialNumbers(1) equals 1 then the Vector1 should contain:

Vector1 = [1 1 1 1 0 0..... 0]

If TrialNumbers(2) equals 2 (the second element in TrialNumbers), then Vector2 shouod containt:

Vector2 = [0 0 0 0 1 1 0 0 ... 0].

It looks simple, I cannot find an answer to this.

Please help.

Answer 1

[Andrei Bobrov]

Vectors = bcxfun(@eq,Trial_Index(:),TrialNumbers(:).');

[Dritan Nikolla]

Hi Bobrov,

How does this work? I am getting a:

Undefined function or variable 'bcxfun'.

Error in mycellfind (line 47)
Vectors = bcxfun(@eq,TRIAL_INDEX(:),myTrialCodes(:).');

[Dritan Nikolla]

You are amazing :), it works, there is a spelling error. it should be:

Vectors = bsxfun(@eq,Trial_Index(:),TrialNumbers(:).');