How can I find the position vector associated to an indice with the find function?

Hi,

I am looking to plot a black grid-cell for specific indices but I don't know how to do that.

I have a matrix A size 1440x721

For some specific indices that I have identified with the find function I want to make the corresponding grid-cell black. Let's say that my condition is B.

I have

indice = find(A<=B)

But indice is now a vector of size 76903X1 and I don't know at what grid-cell it corresponds.

Thanks

Answer 1

[Mathieu NOE]

A and B must be of same size - then find can return row and col indices

example :

A =
    0.9501    0.8913    0.8214
    0.2311    0.7621    0.4447
    0.6068    0.4565    0.6154
    0.4860    0.0185    0.7919
>> B = 0.7*ones(size(A))
B =
    0.7000    0.7000    0.7000
    0.7000    0.7000    0.7000
    0.7000    0.7000    0.7000
    0.7000    0.7000    0.7000
>> [ind_row,ind_col] = find(A<=B)
ind_row =
     2
     3
     4
     3
     4
     2
     3
ind_col =
     1
     1
     1
     2
     2
     3
     3

[A LL]

Great! Thanks!