Assigning to real and imaginary parts of complex array in Fortran

[xaratustra]

I have a an array of type complex. I am trying to assign a value to it in a loop, but I get a strange error "Unclassifiable statement at (1)". I really don't understand why.

do t = 1, count
   real(in(t)) = cos(2 * pi * f0 * t) 
   aimag(in(t))=sin(2 * pi * f0 * t) 
end do

thanks.

 

[AlephZero]

The real() and imag() just return values, like all other Fortran functions. You can't use them to change the real or imaginary part of a complex number.

This should work:

do t = 1, count
  in(t) = ( cos(2 * pi * f0 * t) , sin(2 * pi * f0 * t) )
enddo

 

[xaratustra]

This should work:

do t = 1, count
  in(t) = ( cos(2 * pi * f0 * t) , sin(2 * pi * f0 * t) )
enddo

sorry for late reply.
But unfortunately it doesn't work. Even in the following simple code:

program test
  implicit none
  integer::t
  complex::in(4)
  do t = 1, 4
     in(t) = ( 2*t, 3*3 )
  end do
end program test

gfortran gives the following result:

test.f95:6.18:

     in(t) = ( 2*t, 3*3 )
                     1
Error: Expected a right parenthesis in expression at (1)

any ideas?

 

[AlephZero]

Try in(t) = cmplx( 2*t, 3*3 )

in(t) = (1.0, 2.0) should work for a constant value. Maybe it doesn't work for expressions.

 

[xaratustra]

Yes. works perfectly now.

many thanks.