indexing complex numbers

hi,

I'm trying to index the arrays of as explained below.

a = [-1+i 1+i 1+i 1+i -1+i -1-i -1+i 1+i 1-i -1+i -1-i -1+i -1-i -1-i -1+i -1-i]

b = [00 01 11 10]

-1+1 will be replaced by 00

1+i will be replaced by 01

1-i will be replaced by 11

-1-i will be replaced by 10

the problem is that, any method of indexing i try gives me the same error message saying "Subscript indices must either be real positive integers or logicals." Pls i dnt knw wat to do.

Thanks in advance

Answer 1

[Rick Rosson]

   x = ( 1 + real(a) ) / 2;
   y = ( 1 - imag(a) ) / 2;

   b = [ y ; x ];

[deji]

thanks.. will dis work for only complex numbers like 1+i, 1-i, -1+i and -1-i? or will it work with all sorts of complex numbers

[Walter Roberson]

It will only work for +/-1 +/-1*i . If you have other fixed sets of values with fixed mappings, sometimes you can create simple mapping expressions like Rick shows, and sometimes you cannot.

[deji]

i tried the ,method for complex numbers like 2.2631+2.2631i, 2.2631-2.2631i, -2.2631+2.2631i and -2.2631-2.2631i but it didnt work.. wat method can be used for this