Changing Array Elements with logical indexing

Hi

If I want to change all NaNs in an array A to zero, the following works:

A(isnan(A))=1000

As far as I see the isnan(A) returns nothing but an array of 1's and 0's.

But if I do the following:

B = [ 1 5 8]; B([0 0 1]) = 1000;

to replace the 8 with a 1000, I get an error - why?

Answer 1

[Azzi Abdelmalek]

B = [ 1 5 8];
B(logical([0 0 1])) = 1000;

[MiauMiau]

thx...then the result of the isnan are logical 1s and 0s?

[per isakson]

Yes,

    >> class( isnan( nan ) )
    ans =
    logical
    >>

Answer 2

[TAB]

B(B==8)=1000;