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Re: Matrices [message #82878 is a reply to message #42151]

Mon, 21 January 2013 12:06

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On 1/21/13 11:39 AM, fd_luni@mail.com wrote:
> Τη Δευτέρα, 21 Ιανουαρίου 2013 5:21:13 μ.μ. UTC+2, ο χρήστης Matthew Argall έγραψε:
>>> myNbyFour [:,0] = [1, 2, 3, 4]
>>
>>
>>
>> Sorry, this should be
>>
>>
>>
>> myNbyFour[0,*] = [1, 2, 3, 4]
>
> Thank you very much for your answers. Maybe I didn't explain very well what I actually wanna do before. Let's say I have four arrays A,B,C,D and E with 100 elements each. Now, I want to create an array which includes the elements of A,B,C and D (100 by 4 matrix).In other words, I want to write the four arrays A,B,C,D into 1 matrix,and a matrix which includes only the elements of E (vertically) so 100 by 1 matrix.
>

IDL> ABCD = [[A], [B], [C], [D]]
IDL> help, ABCD
<Expression> FLOAT = Array[100, 4]
IDL> Ecolumn = reform(E, n_elements(E), 1)
IDL> help, Ecolumn
ECOLUMN FLOAT = Array[100, 1]

Of course, Ecolumn will lose the trailing single dimension if you do
anything with it... but many (but not all!) things you might think of
doing with it won't care.

-Jeremy.

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[Message index]

		matrices with different size By: ikverveelmijdood on Thu, 13 January 2005 08:21
		Re: matrices with different size By: Chris Lee on Thu, 13 January 2005 14:30
		Re: Matrices By: Jeremy Bailin on Mon, 21 January 2013 12:06
		Re: Matrices By: fd_luni on Mon, 21 January 2013 09:55
		Re: Matrices By: fd_luni on Mon, 21 January 2013 09:39
		Re: Matrices By: Matthew Argall on Mon, 21 January 2013 07:21
		Re: Matrices By: Matthew Argall on Mon, 21 January 2013 07:20
		Re: Matrices By: Helder Marchetto on Mon, 21 January 2013 06:48

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