Hello,
Hans Thompson wrote
>
> Thank you to everyone in this forum that has been helping me with the
> basic R skills while I learn to apply them.
>
> I would like to take the coefficient of two coordinates. One of them
> comes from two different columns in a table:
>
>
>>A
> x y
> a 1 3
> b 2 2
> c 3 1
>
> the other is set and for this question I'll just call it (1,1)
>
> I've been trying to find a way to return the coefficient values for a,b,
> and c through (1,1).
>
> Also, it looks like my questions are very basic compared to the others
> being asked on this forum so please let me know if I am out of place. :)
>
Sorry, but I'm not understanding what (1, 1) is. Are those the matrix A
coordinates, (row, col)?
If so, use an index matrix, with two columns. Here is an example.
elm1 <- c(1, 1)
elm2 <- c(2, 1)
inx <- matrix(c(elm1, elm2), ncol=2, byrow=TRUE)
colnames(inx) <- c("Row", "Col")
inx
A[inx]
Hope this helps,
Rui Barradas
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