Displaying 2 results from an estimated 2 matches for "spdiags".
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hpdiags
2011 Feb 25
1
Accessing sub diagonals / spdiag in R ?
Hello, I'm attempting to access a specific number of sub diagonals in a
MATRIX and have been accustomed to using spdiags in MATLAB or Octave. I've
got a solution pieced together using for loops and it works though isn't
vectorized and liable to run very slow
for large matrices.
As an example:
A =
1 2 3 4 5
9 8 7 6 5
4 5 6 7 8
5 4 3 2 1
8 7 6 0 1
The subdiagonals are: 9,5,3,0 4,4,6 5,7 and 8,
I know ab...
2012 Apr 12
3
writing spdiags function for R
Dear R-list,
I am in the process of translating a long function written in Matlab
into R (mainly because I am a big of fan of R, and folks will not
have to pay to use it :). In the translation of this function
I got stack because they use spdiags, which, as far as I can tell
it is not available in R. I have explored the Matrix package, from
which I borrowed some of the functions (e.g., sparseMatrix), but
I could not actually find an equivalent to spdiags (please, let
me know if it is there somewhere).
So, I have written my own spdiags func...