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After reading and trying the [compiler instructions](https://github.com/Rdatatable/data.table/wiki/Installation#openmp-enabled-compiler-for-mac) for macOS, I was wondering if `gcc` from homebrew would…
pat-s updated
3 years ago
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A `allow.absent.cols` option for `setnames` would facilitate cases when the user wants to apply a column mapping without necessarily knowing whether all columns will exist. I'm currently using the fol…
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``` r
library(dtplyr)
library(dplyr, warn.conflicts = FALSE)
mtcars %>%
lazy_dt() %>%
group_by(cyl) %>%
summarise(across(everything(), mean))
#> Source: local data table [3 x 12]
#>…
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PR #4671 filed yesterday eve failed to complete CI; I assumed a temporary glitch. Looking now, some 12+ hours later I get nothing but 403s for the URLs by
```sh
curl -fLo /tmp/R-4.0.0-$(lsb_rel…
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I was running a parallelization test for RxODE (v. 0.9.1-4) on my local Windows machine and on a Linux-based cluster (RxODE v. 0.9.1-9 is installed there). When I run it on my Windows machine it doesn…
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Hi I am wondering how I can replace all the 'NA' after joining two DT's. I found a couple of issues here and looked into the docs, but I wasn't able to leverage this into a solution.
The code below…
ghost updated
4 years ago
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Example:
download and unzip [bug.tsv.zip](https://github.com/Rdatatable/data.table/files/5306193/bug.tsv.zip)
```
x=fread('bug.tsv')
x[a%in%c('G20','G40'),b:='b']
```
I can reproduce this in Lin…
webbp updated
4 years ago
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```R
> as.data.table(sum)
Error: C stack usage 15923664 is too close to the limit
```
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We have the amazing package dtplyr that, among other things, helps us speed up `group_by %>% summarise`. Common operations that could be sped up big time in `tidyr` are `unnest` (https://www.r-blogger…
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Likely traced to a bug in data.table::foverlaps reported here
https://github.com/Rdatatable/data.table/issues/4580
I could switch all the code to equivalent non-equijoins but previous timings I've…