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I doubt that R's basic matrix capabilities can handle this, but have a look at the Matrix package, especially if your matrix is some special form. Bert On Tue, Apr 11, 2023, 19:21 Shunran Zhang <szhang at ngs.gen-info.osaka-u.ac.jp> wrote: > Hi all, > > I am currently working with a quite large matrix that takes 300G of > memory. My computer only has 512G of memory. I would need to do a few > arithmetic on it with a scalar value. My current code looks like this...

Hi all, I am currently working with a quite large matrix that takes 300G of memory. My computer only has 512G of memory. I would need to do a few arithmetic on it with a scalar value. My current code looks like this: mat <- 100 - mat However such code quickly uses up all of the remaining memory and got the R script killed by OOM killer. Are there any more memory-efficient way of doing

...On Wed, Apr 12, 2023 at 7:34?AM Bert Gunter <bgunter.4567 at gmail.com> wrote: > I doubt that R's basic matrix capabilities can handle this, but have a look > at the Matrix package, especially if your matrix is some special form. > > Bert > > On Tue, Apr 11, 2023, 19:21 Shunran Zhang < > szhang at ngs.gen-info.osaka-u.ac.jp> > wrote: > > > Hi all, > > > > I am currently working with a quite large matrix that takes 300G of > > memory. My computer only has 512G of memory. I would need to do a few > > arithmetic on it with a scala...

...apped in and out from the disk that allows larger things to be done, albeit often much slower. I also note that you can remove some things you are not using and hope garbage collection happens soon enough. -----Original Message----- From: R-help <r-help-bounces at r-project.org> On Behalf Of Shunran Zhang Sent: Tuesday, April 11, 2023 10:21 PM To: r-help at r-project.org Subject: [R] Matrix scalar operation that saves memory? Hi all, I am currently working with a quite large matrix that takes 300G of memory. My computer only has 512G of memory. I would need to do a few arithmetic on it wit...