Periodic Functions

[Sestak, Dr. Michael]

If you want the "terrain" that is not positive to all be set to zero, you
can define a new variable using maskout and const to leave all the positive
values as they are and set the negative values to zero.

define newelev=const(maskout(oldelev,oldelev),0,-u)



-----Original Message-----
From: Jeff Frame [mailto:jwf155 at PSU.EDU]
Sent: Monday, April 18, 2005 11:35 AM
To: GRADSUSR at LIST.CINECA.IT
Subject: Periodic Functions


Hi,

I would like to display a periodic function, such as cos(x), for an
analytic terrain profile.  How would I limit this function to one
period, between two given x values?  For example, say my mountain exists
from x=190 - 210 km, but my display is set from x=170-230 km (to see the
upstream and downstream effects of the terrain).  Currently, I can only
get this function to plot for every period in the display range, whereas
I only want one period displayed.  My ultimate goal is to subtract off
this terrain height to convert heights from above sea level to above
ground level.

Any suggestions??

Thanks,

--

--------------------------------
Jeffrey Frame
Graduate Research Assistant
Ph.D. Candidate
Department of Meteorology
Penn State University
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