Question

I’ve got a huge array of values, all or which are much smaller than 1, so using a round up/down function is useless. Is there anyway I can use/make the ‘find’ function on these non-integer values?

e.g.

ind=find(x,9.5201e-007)

FWIW all the values are in acceding sequential order in the array.

Much appreciated!

Answer 1

The syntax you’re using isn’t correct.

find(X,k)

returns k non-zero values, which is why k must be an integer. You want

find(x==9.5021e-007);
%#   ______________<-- logical index: ones where condition is true, else zeros
%#   the single-argument of find returns all non-zero elements, which happens
%#   at the locations of your value of interest.

Note that this needs to be an exact representation of the floating point number, otherwise it will fail. If you need tolerance, try the following example:

tol = 1e-9; %# or some other value
val = 9.5021e-007;
find(abs(x-val)<tol);