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Re: MAKE_ARRAY question [message #24726 is a reply to message #24725]

Fri, 13 April 2001 11:48

Liam E. Gumley
Messages: 378
Registered: January 2000

Senior Member

Paul van Delst wrote:
> One could also do:
>
> x = MAKE_ARRAY( n_pts, VALUE = 0.0, DOUBLE = double )
>
> i.e value = float if double is not set, but I want to avoid the value assignation. The
> array can be quite large (many millions of points x 2) hence the /NOZERO. The performance
> hit of using the VALUE keyword is noticeable (the /NOZERO has no effect if VALUE is used).

if keyword_set(double) then $
x = dblarr(npts, /nozero) else $
x = fltarr(npts, /nozero)

OR

x = keyword_set(double) ? dblarr(npts, /nozero) : fltarr(npts, /nozero)

Cheers,
Liam.
http://cimss.ssec.wisc.edu/~gumley

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[Message index]

		Re: MAKE_ARRAY question By: Paul van Delst on Fri, 13 April 2001 12:03
		Re: MAKE_ARRAY question By: Liam E. Gumley on Fri, 13 April 2001 11:52
		Re: MAKE_ARRAY question By: Liam E. Gumley on Fri, 13 April 2001 11:48
		Re: MAKE_ARRAY question By: Craig Markwardt on Fri, 13 April 2001 11:38
		Re: MAKE_ARRAY question By: Paul van Delst on Fri, 13 April 2001 10:26
		Re: MAKE_ARRAY question By: Paul van Delst on Fri, 13 April 2001 10:19
		Re: MAKE_ARRAY question By: btt on Fri, 13 April 2001 10:08

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