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Re: array of Julian Days [message #63555 is a reply to message #63554]

Tue, 11 November 2008 13:51

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Bulrush schrieb:
> Hello,
> I wanted to generate an array of Jdays of the year, and extract some
> of them according to 8 days of increment. However the following code I
> could think of does not work.
>
> Any help is appreciated.
>
> Jdays = Lindgen (366)
> Start_day= 265
> End_day = 361
>
> Daystep = 265
> ; collect the days
> WHILE Daystep LE 361and Daystep GT 265 Do Begin
> arr = Where (Jdays LE Daystep+8 and Jdays GT Daystep, count)
> Days = JDays[arr]
> EndWhile
>
> What is wrong with it? How can I get the job done?
>
> Thanks

Do you ask us to debug your code ?

I don't want to be ignorant but a breakpoint and by stepping yourself
through the code line by line does help you more than a ready to go
solution from us.

Anyway I want also give some hints. idl has builtin step methods (oh,
david what is the right word for that)

e.g a for loop can step
IDL> for i=0,50,8 do print,i
0
8
16
24
32
40
48

e.g. array indices can be stepped
IDL> print, (lindgen(50))[0:49:8]
0 8 16 24 32 40
48

cheers
Reimar

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[Message index]

		Re: array of Julian Days By: David Fanning on Wed, 12 November 2008 10:13
		Re: array of Julian Days By: Wasit.Weather on Wed, 12 November 2008 09:09
		Re: array of Julian Days By: David Fanning on Wed, 12 November 2008 07:37
		Re: array of Julian Days By: Wasit.Weather on Wed, 12 November 2008 07:21
		Re: array of Julian Days By: R.Bauer on Wed, 12 November 2008 01:08
		Re: array of Julian Days By: R.Bauer on Wed, 12 November 2008 01:05
		Re: array of Julian Days By: Craig Markwardt on Tue, 11 November 2008 15:24
		Re: array of Julian Days By: Wasit.Weather on Tue, 11 November 2008 14:37
		Re: array of Julian Days By: Wasit.Weather on Tue, 11 November 2008 14:35
		Re: array of Julian Days By: David Fanning on Tue, 11 November 2008 14:12
		Re: array of Julian Days By: R.G. Stockwell on Tue, 11 November 2008 13:57
		Re: array of Julian Days By: R.Bauer on Tue, 11 November 2008 13:51
		Re: array of Julian Days By: R.Bauer on Thu, 13 November 2008 01:32

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