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Re: Euler formula with complex numbers [message #29518 is a reply to message #29515]

Fri, 22 February 2002 10:06

J�lio Maranh�o
Messages: 8
Registered: May 2000

Junior Member

Look into the "IDL Online Help" in "What's New in IDL 5.5". Search for ATAN
and look for the changes.

ATAN(z) doesn't return the phase anymore. It returns a complex.
Use ATAN(IMAGINARY(z), REAL_PART(z)) instead. I know it's awful, but...

Cheers.

J�lio Maranh�o

"frederic" <raison@srl.caltech.edu> escreveu na mensagem
news:9f6b22a3.0202220953.2ceb4f73@posting.google.com...
I start from:

z=complex(3,2)
mag=abs(z)
phi=atan(z)

and I want to come back to z with mag and phi in this way:

z_prime=mag*exp(complex(0,1)*phi)

and I get z_prime=( 0.715179, 3.02955) which is different from z.

What is wrong in the way I use IDL?

Thank you

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[Message index]

		Re: Euler formula with complex numbers By: Robert Stockwell on Fri, 22 February 2002 13:39
		Re: Euler formula with complex numbers By: J�lio Maranh�o on Fri, 22 February 2002 10:06

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