Displaying 3 results from an estimated 3 matches for "matrixops".
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matrixes
2010 Nov 19
0
Error from sparse pattern matrix product
...minimize memory 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)/obje...
2023 Apr 21
0
[Rd] R 4.3.0 is released
...mes df with a large
number of columns. (Thanks to Gabriel Becker's PR#18500,
PR#18503 and discussants, prompted by a report from Toby Dylan
Hocking on the R-devel mailing list.)
* The matrix multiply operator %*% is now an S3 generic, belonging
to new group generic matrixOps. From Tomasz Kalinowski's
contribution in PR#18483.
* New function array2DF() to convert arrays to data frames,
particularly useful for the list arrays created by tapply().
DATES and TIMES:
* On platforms where (non-UTC) datetimes before 1902 (or before
1900 as w...
2023 Apr 21
0
[Rd] R 4.3.0 is released
...mes df with a large
number of columns. (Thanks to Gabriel Becker's PR#18500,
PR#18503 and discussants, prompted by a report from Toby Dylan
Hocking on the R-devel mailing list.)
* The matrix multiply operator %*% is now an S3 generic, belonging
to new group generic matrixOps. From Tomasz Kalinowski's
contribution in PR#18483.
* New function array2DF() to convert arrays to data frames,
particularly useful for the list arrays created by tapply().
DATES and TIMES:
* On platforms where (non-UTC) datetimes before 1902 (or before
1900 as w...