| Replicate array over columns - using transpose? [message #79700] |
Thu, 22 March 2012 03:11 |
Robin Wilson
Messages: 40
Registered: August 2010
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Member |
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Hi all,
I've got an array, a, as follows:
IDL> print, a
10.0000 35.0000 60.0000 85.0000 110.000
I want to replicate this across 4 columns to produce an array like the
following:
10 10 10 10
35 35 35 35
60 60 60 60
85 85 85 85
110 110 110 110
I'm using the CMREPLICATE routine to do this, and get the following:
IDL> print, CMREPLICATE(a, 4)
10.0000 35.0000 60.0000 85.0000 110.000
10.0000 35.0000 60.0000 85.0000 110.000
10.0000 35.0000 60.0000 85.0000 110.000
10.0000 35.0000 60.0000 85.0000 110.000
However, I want to replicate it in the columns as in the example above.
As far as I can see it there are two ways to deal with this: transpose
the array after I've done it (computationally expensive, as I'll be
doing it with far larger arrays in the real program) or transpose it
before running CMREPLICATE. However, if I do this I get an extra
dimension added:
IDL> help, CMREPLICATE(transpose(a), 4)
<Expression> FLOAT = Array[1, 5, 4]
Is there a way to replicate over the columns without adding this extra
dimension? I'm sure I'm missing something simple here.
Cheers,
Robin
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