On Wed, 2016-12-14 at 13:46 +0100, Patrick Dupre wrote:
Thank very good
However, there is something that I do not understand
I define
W1=0.2
z(x) = (x + W1*{0,1})
w(x) = faddeeva (z (x))
and
Voi (x) = voigt (x, W1)
Voi (x) and real (w(x)) are exactly the same
Now,
d_w (x) = - 2 * z (x) * w (z (x)) + 2*{0,1}/sqrt(pi) " which is the
derivative
D_voi(x,del) = (Voi (x+del) - Voi (x-del)) / 2 / del
now
plot [-4:4] D_voi(x,0.001)
and
plot [-4:4] real (d_w (x))
are different except for W1=0
What am I doing wrong?
It seems that the issue is with the faddeeva, or when I my calls!
Thank.
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Patrick DUPRÉ | | email: pdupre@gmx.
com
Laboratoire de Physico-Chimie de l'Atmosphère | |
Université du Littoral-Côte d'Opale | |
Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82
44
189A, avenue Maurice Schumann | | 59140 Dunkerque,
France
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Hi, Patrick,
I am not a mathematician, but I have programmed extensively
with complex numbers. W(x)=faddeeva(z(x)) will return a complex,
right?
The magnitude of a complex is its full value, so you would need
the sqrt(real^2+imag^2) would you not?
Regards,
Les H