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Re: Extract a sub-structure from a structure [message #47179 is a reply to message #47178]

Thu, 26 January 2006 08:15

L. Testut
Messages: 16
Registered: January 2006

Junior Member

Hi David,

Even with the parantheses it doesn't work ?
With solution 1 it becomes more tricky to change the type of each
field parameter in the structure ? and what about the memory occupied
by the old complete structure (which I don't need anymore)...or was it
a joke ?

Then

toto=findgen(100)
print,toto[where(toto lt 50)]
toto=toto[where(toto lt 50)]

this sequence works and I've read on this newsgroup that a
de-referenced pointer is lik a variable
so

toto=ptr_new(findgen(100))
print,*toto[where(*toto lt 50)]
*toto=*toto[where(*toto lt 50)]

why this last sequence doesn't work ? even with parantheses ?

Cheers,
Laurent
PS: what is the local time in Fort Collins ?

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[Message index]

		Re: Extract a sub-structure from a structure By: btt on Fri, 27 January 2006 07:29
		Re: Extract a sub-structure from a structure By: L. Testut on Thu, 26 January 2006 09:47
		Re: Extract a sub-structure from a structure By: David Fanning on Thu, 26 January 2006 08:32
		Re: Extract a sub-structure from a structure By: L. Testut on Thu, 26 January 2006 08:15
		Re: Extract a sub-structure from a structure By: David Fanning on Thu, 26 January 2006 07:42
		Re: Extract a sub-structure from a structure By: JD Smith on Fri, 27 January 2006 18:01

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