large_matrix {spam} | R Documentation |
The R package spam can handle sparse matrices with up to 2^31-1 non-zero elements. For matrices with more non-zero elements it is necessary to load the spam64 package in addition.
With the help of the R package dotCall64 spam interfaces either the compiled code with 32-bit integers provided in spam or the compiled code with 64-bit integers provided in spam64.
Reinhard Furrer, Florian Gerber, Kaspar Moesinger, Daniel Gerber
F. Gerber, K. Moesinger, R. Furrer (2017), Extending R packages to support 64-bit compiled code: An illustration with spam64 and GIMMS NDVI3g data, Computer & Geoscience 104, 109-119, https://doi.org/10.1016/j.cageo.2016.11.015.
## Not run: ## the following matrices are very large, and hence, ## require much memory and cpu time. library("spam64") s1 <- spam(1, ncol=2^30) # 32-bit matrix s1 s2 <- cbind(s1, s1) # 64-bit matrix s2 s3 <- spam(1, ncol=2^31) # 64-bit matrix s3 ## End(Not run)