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Re: Summer "English" heat or just me: Array slicing [message #85314 is a reply to message #85313]

Wed, 24 July 2013 06:57

Fabzi
Messages: 305
Registered: July 2010

Senior Member

On 07/24/2013 03:46 PM, David Fanning wrote:
> I would if I understood it. :-(

This is what you said 14 years ago ;-)

I think I understood this part:

;-Quoting Henry Chapman----------------------------------------------

There are two behaviours you may want when you try result = array[x,
y,..., z], and x, y, ..., z are 1-d arrays:

1. return a 1-d array with result[i] = array[x[i], y[i],..., z[i]]
2. return a 2-d array with result[i, j,..., k] = array[x[i],
y[j],...,z[k]]

IDL does (1), which requires x, y,...,z all have the same length.
However, IDL does (2) if one of the dimensions is a subscript range.
Since a single number is a subscript range, it will do (2) in that
case. And since 0, written in as an extra dimension is also a subscript
range, IDL will use behaviour (2)
;----------------------------------------------------------- --------

I must admit that I am only really rarely confronted to cases where I
can use this, but it is good to know...

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[Message index]

		Summer "English" heat or just me: Array slicing By: ameigs on Tue, 23 July 2013 08:51
		Re: Summer "English" heat or just me: Array slicing By: Fabzi on Tue, 23 July 2013 09:12
		Re: Summer "English" heat or just me: Array slicing By: Lajos Foldy on Tue, 23 July 2013 09:16
		Re: Summer "English" heat or just me: Array slicing By: Phillip Bitzer on Tue, 23 July 2013 09:45
		Re: Summer "English" heat or just me: Array slicing By: Fabzi on Wed, 24 July 2013 06:44
		Re: Summer "English" heat or just me: Array slicing By: David Fanning on Wed, 24 July 2013 06:46
		Re: Summer "English" heat or just me: Array slicing By: Fabzi on Wed, 24 July 2013 06:57
		Re: Summer "English" heat or just me: Array slicing By: David Fanning on Wed, 24 July 2013 07:19
		Re: Summer "English" heat or just me: Array slicing By: Fabzi on Wed, 24 July 2013 07:25
		Re: Summer "English" heat or just me: Array slicing By: David Fanning on Wed, 24 July 2013 07:30

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