[R] Please help! Matrices and parameter of time

Jeff Newmiller jdnewmil at dcn.davis.CA.us
Tue Apr 1 15:49:31 CEST 2014

This mailing list has a no homework policy (read the Posting Guide, please, which also requests that you post in plain text format only). If this is not homework then you will have to be a bit more specific about what you know and what you don't in order to get useful help. Questions about why you should put certain values in particular locations in your array are not about R and are off topic here.

If you are having difficulty with R syntax for arrays, I recommend reading the Introduction to R document supplied with the software, and experimenting. If you are still having difficulty after doing that, then refer to where you get lost in that document when asking for more help. 

A word of advice: the least obvious thing about arrays to beginners is that they are constructed using one big vector rather than a bunch of little vectors, yet it is possible to extract or change little vectors or arrays from the larger array using indexing.
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On April 1, 2014 1:37:14 AM PDT, ANNA SIMEONIDOU <assymeon2 at hotmail.com> wrote:
>Hi, Well, the solution to my problem maybe is easy, but i have really
>stuck with this.
>I have a process which evolves in three times, so there is the
>parameter of time (t=1,2,3).More particularly i have three 4*4 
>matrices, one for each time. In other words each element has three
>cordinates: time, row and column.
>The problems are these:i don't know how to express these matrices.Also
>i don't know how can i extract each element, for example, if i want the
>element from the matrix corresponding to the 3d time, the  2nd row, the
>3d column, how will i extract this? 
>I would appreciate any help and idea!Thank you!Anna S.
>	[[alternative HTML version deleted]]
>R-help at r-project.org mailing list
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

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