any returns 0 eventhough there is a non zero element in the row

I have a cell that looks like this:

measureables = 

      'GS_L'    'OECF'    'DYNAMIC_RANGE'    'NOISE'

I do this:

      OECFINDEX               = strcmp(measureables(:,:),'OECF');

which gives:

      ans =

         0     1     0     0

now I do this:

      OECFINDEX               = OECFINDEX(:,any(OECFINDEX));

which should give (correct me if I'm wrong): 1

but the answer is 0.

It does work for larger cells that look like this:

measureables = 

        measureables = 

      'GS_L'    'OECF'    'DYNAMIC_RANGE'    'NOISE'
      'GS_L'    'OECF'    'DYNAMIC_RANGE'    'NOISE'
      'GS_L'    'OECF'    'DYNAMIC_RANGE'    'NOISE'
      'GS_L'    'DYNAMIC_RANGE'    'NOISE'

here the program gives me:

1
1
1
0

why is not working for a single column?

Answer 1

[Thorsten]

Because it's just a vector (or 1 x N matrix),

any(OECFINDEX)

returns a single number, namely 1 in your example, and because OECFINDEX has just one row,

OECFINDEX(:,any(OECFINDEX))

is the same as

 OECFINDEX(:,1);

or

 OECFINDEX(1)

which is 0 in your case.

[Thomas Koelen]

Thanks, this answers my question. I made a for loop now to fill an array.

Answer 2

[Star Strider]

I believe you’re using the wrong syntax with any.

Consider:

OECFINDEX = [0 0 1 0];
OECFINDEX = any(OECFINDEX)

produces:

OECFINDEX =

       1