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Newbie question concerning summations/loops in IDL [message #61737]

Tue, 29 July 2008 16:12

mbweller
Messages: 24
Registered: July 2008

Junior Member

Hello,

I have need of some experienced users with sort of a newbie question.

I am writing a code that needs a summation in it, this is what I have
thus far:

v= ; volume of region
a= ; area of region
o= 60*!pi/180 ; fault dip angle
g= ; scaling factor
t= 150 ; elastic lithosphere thickness
h= ; depth of faulting

ind_small = where(thaext[1,*] lt t)
ind_large = where(thaext[1,*] ge t)
thaext_small = thaext[*,ind_small]
thaext_large = thaext[*,ind_large]

ens=(sin(o)*cos(o)/v)* ; horizonatal normal strain for small faults
enl=(cos(o)/a)* ; horizonatal normal strain for
large faults
evs=(-sin(o)*cos(o)/v)* ; vertical normal strain for small faults
evl=(-cos(o)/a)* ; vertical normal strain for large faults

The summation needs to be after * in the ens, enl, evs and evl
fields.
It must be of the form:
summation N, i=0 [Di Li Hi] for small faults, where N = ind_small, Hi=
T/sin(o) and
summation N, i=0 [Di Li] for large faults, where N=ind_large

Could anyone provide any insight/guidance?

Thanks,
~Matt

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[Message index]

		Newbie question concerning summations/loops in IDL By: mbweller on Tue, 29 July 2008 16:12
		Re: Newbie question concerning summations/loops in IDL By: mbweller on Thu, 31 July 2008 11:49
		Re: Newbie question concerning summations/loops in IDL By: Jean H. on Tue, 05 August 2008 13:52
		Re: Newbie question concerning summations/loops in IDL By: Wox on Thu, 31 July 2008 01:40
		Re: Newbie question concerning summations/loops in IDL By: Wox on Thu, 31 July 2008 01:37
		Re: Newbie question concerning summations/loops in IDL By: Chris[6] on Wed, 30 July 2008 17:52

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