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Re: really stupid matrix question [message #94838 is a reply to message #94837]

Tue, 31 October 2017 12:51

benjamin.castellani is currently offline

benjamin.castellani
Messages: 7
Registered: October 2017

Junior Member

The first dimension of any array/vector is column index in IDL.

x = findgen(5)

produces an array with 5 Columns and 1 (Implied) Row.

I always remember Matlab is (Row Index, Column Index)--> RC --> RC Cars (childhood toy). IDL is the opposite of Matlab. CR --> ???
Do you have a mnemonic device for this one?

On Tuesday, October 31, 2017 at 11:47:00 AM UTC-6, Ann Nonymous wrote:
> On Tuesday, October 31, 2017 at 1:45:33 PM UTC-4, Ann Nonymous wrote:
>> Thanks for the help everyone. Please allow me another question:
>>
>> x=findgen(5)
>>
>> is x a column vector or a row vector? It prints out like its a row, of course, but I haven't found anything in the documentation that explicitly says which one it is. Saying that the first dimension is stored contiguously is a bit ambiguous.
>
> I suppose it must be a row, since transpose(x) is clearly a column. Never mind. Thanks.

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[Message index]

		really stupid matrix question By: astroboy.20000 on Mon, 30 October 2017 10:49
		Re: really stupid matrix question By: wlandsman on Mon, 30 October 2017 12:46
		Re: really stupid matrix question By: Burch on Mon, 30 October 2017 13:15
		Re: really stupid matrix question By: astroboy.20000 on Tue, 31 October 2017 10:45
		Re: really stupid matrix question By: astroboy.20000 on Tue, 31 October 2017 10:46
		Re: really stupid matrix question By: benjamin.castellani on Tue, 31 October 2017 12:51
		Re: really stupid matrix question By: astroboy.20000 on Wed, 01 November 2017 15:32

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