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cholmod_ssdmult
2010 Nov 19
0
Error from sparse pattern matrix product
...emory consumption fails.
m1 <- Matrix(c(rep(1,1000), rep(0,2000)), 1500)
m2 <- as(m1, "ngCMatrix")
Then
m1 %*% c(1,2)
produces the desired matrix product, while
m2 %*% c(1,2)
results in the error
Error in x %*% y :
Cholmod error 'invalid xtype' at file:../MatrixOps/cholmod_sdmult.c, line 82
I might be making a wrong assumption that this should work, or another mistake,
but the error is somewhat cryptic, and reading the help pages and listing the
methods for %*% indicate that matrix products with x of class ngCMatrix
should work. Anyway
object.size(m1)/object.size(m2)
in...