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Re: Make_array() and using arrays as subscripts [message #46851 is a reply to message #46850]

Tue, 10 January 2006 00:13

peter.albert@gmx.de is currently offline

peter.albert@gmx.de
Messages: 108
Registered: July 2005

Senior Member

Hi Sheldon,

well, reading the title of this posting I don't see where Make_array()
comes into your question, but anyway ... :-)

Like said already, WEHRE always returns a 1-dimensional vector, so here
you loose your dimensions in my_array. If you can be sure that
good_indices always is a factor of 3 (i.e., if a line contains '9999',
all 3 elements are equal to ''9999'), then you can use a simple

my_array = reform(my_array, 3, n_elements(good_indices)/3)

to get things right again.

However, if this is not the case, I can suggest yet another approach
without loops:

good_indices = where(strpos(strjoin(my_array), '9999')) eq -1)

Mind that in this case good_indices is only "valid" on the second
dimension, so at maximum it can have 344 elements. I am just
concatenating each line into one string each and look for the occurence
of '9999' within the string. If this substring does not occur at all,
it's a good line.

Then you can use

my_array = my_array[*, good_indices]

to shrink your array to the good lines without the nodata value.

Cheers,

Peter

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[Message index]

		Re: Make_array() and using arrays as subscripts By: Liberum on Tue, 10 January 2006 01:09
		Re: Make_array() and using arrays as subscripts By: Liberum on Tue, 10 January 2006 01:08
		Re: Make_array() and using arrays as subscripts By: Liberum on Tue, 10 January 2006 01:07
		Re: Make_array() and using arrays as subscripts By: peter.albert@gmx.de on Tue, 10 January 2006 00:13
		Re: Make_array() and using arrays as subscripts By: b_gom on Mon, 09 January 2006 13:24
		Re: Make_array() and using arrays as subscripts By: btt on Mon, 09 January 2006 13:19
		Re: Make_array() and using arrays as subscripts By: peter.albert@gmx.de on Tue, 10 January 2006 01:31

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