ggrothendieck

6 ms·

1.
by ggrothendieck 2y ago
Gas production from the North Sea is low because they imposed onerous windfall surtaxes on it so now it is unattractive to produce.
2.
by ggrothendieck 2y ago
In R `nnls` (nonnegative least squares) does not guarantee integrality but in this case does give one solution and it happens to be integral: `library(nnls); nnls(A, b)`
3.
by ggrothendieck 2y ago
The poorman package (on CRAN) implements a lot of tidyverse with no dependencies. Other packages that provide alternate implementations are datawizard and tidytable.
4.
by ggrothendieck 2y ago
We used to call stuff like this "the warm body clause".
5.
by ggrothendieck 2y ago
David P. Ellerman has a mathematical approach to accounting based on what he refers to as the Pacioli group. A provisional element of the Pacioli group looks like x//y where x and y are non-negative integers and we form equivalenc
6.
by ggrothendieck 3y ago
The HN news title seems inaccurate. This is not necessarily a drop in demand nor is it applicable to all shipping as also suggested by the title. The article suggests it is an oversupply of container ships with very few ships scrapped as o
7.
by ggrothendieck 4y ago
Per Brinch Handsen, Programming a Personal Computer. Book is online. Interpreter, editor and OS in about 10 KLOC. http://pascal.hansotten.com/per-brinch-hansen/ Also https://news.ycombinator.com/item?id
8.
by ggrothendieck 5y ago
Of course it is possible to screw up but if you don't update your packages and record the date that does not seem to be R's fault.
9.
by ggrothendieck 5y ago
The packages that were used in statistics were SAS, SPSS and Stata. perl is not a statistical package and has nowhere near the depth of statistical capabilities of R. Don't forget that I also mentioned the checkpoint package in my pos
10.
by ggrothendieck 5y ago
Is the subset R interpreter you wrote available on the net?
11.
by ggrothendieck 5y ago
1. Before R commercial statistical packages were mainly used. You can, in principle, just use assembler too and develop everything yourself but it isn't practical. Regarding C/C++ and Fortran, many R packages are, in fact, wrappe
12.
by ggrothendieck 5y ago
What needs to be added is that before R the reproducibility problem in science was compounded by the fact that analyses were done with proprietary software limiting communication and replication of those analyses. This was and continues to
13.
by ggrothendieck 5y ago
Furthermore a test just twice as large would be sufficient to determine significance at the 1% level even with a two sided test if the same death rate continued to hold. ivm <- c(3, 247-3) con <- c(10, 249-10) m <- rbind(iv
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by ggrothendieck 5y ago
The Mech Vent and ICU also used two sided tests.
15.
by ggrothendieck 5y ago
Also they say they used the Fisher exact test and got a p value for mortality of 0.09 so it seems they were doing a two-sided test which is the default for fisher.test in R. ivm <- c(3, 247-3) con <- c(10, 249-10) m <- rbin
16.
by ggrothendieck 5y ago
Not being statistically significant is not a proof that it doesn't work -- it only means they could not reject the possibility that the results were due to chance. The possibility that it slashed the death rate by 3x (which is what ha
17.
by ggrothendieck 5y ago
If we look at the secondary endpoints note that 3x as many died in the control group, 2.5x as many needed mechanical ventilation and one third more need to go to the ICU. Ivermectin Control n 247 249 Mec
18.
by ggrothendieck 5y ago
The link refers to dplyr not being able to use databases but actually there is a database backend for it in package dbplyr. See https://dbplyr.tidyverse.org/
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by ggrothendieck 5y ago
> plug a USB device in that has all my media files on it If you have multiple radios (like I do) that would require physically moving the USB from one to another.
20.
by ggrothendieck 5y ago
At the time that CCrane, Grace and others started offering internet radios everyone was using Reciva and articles at the time referred to it as the Microsoft of internet radio so I don't think anyone at the time could have expected its
21.
by ggrothendieck 5y ago
> Grace Digital bricked my three GD streaming devices If you are referring to a Reciva based internet radio the web site which powers them was shut down by the owner of that site, not by Grace Digital. Also, if it is similar to my CC Wi
22.
by ggrothendieck 6y ago
The vroom R package is likely the fastest R package in read speed, not the ones used in this article. vroom was 13.1x faster than R's fread/data.table based on the read performance benchmark in https://cran.r-project.o
23.
by ggrothendieck 6y ago
Personal sound amplification devices already exist at significantly less cost than conventional hearing aids. https://jamanetwork.com/journals/jama/fullarticle/2635618 https://www.nytimes.com/
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by ggrothendieck 6y ago
This may destroy viruses but it does not kill them as viruses are not alive.
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by ggrothendieck 6y ago
Correct. One can write r"(c:\Windows\System32)" . Check out additional examples at the end of the help file: https://github.com/wch/r-source/blob/trunk/src/library/base/...
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by ggrothendieck 6y ago
The new C++ derived syntax for string literals seems to me to be the top new feature. It will make it possible to support markdown, latex, R code and Windows path literals without munging them first.
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by ggrothendieck 7y ago
This is related to the Euphoria language which has a long history so I gather this is not something that was quickly slapped together. http://phix.x10.mx/docs/html/eucompat.htm
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by ggrothendieck 9y ago
The video claims roundabouts reduce accidents but according to the experience here: http://www.regionofwaterloo.ca/en/gettingAround/Roundabout-S... collisions involving injury or fatalities did decrease by 51% at
29.
by ggrothendieck 9y ago
You don't necesssarily need to know the rates. "If blue whales got 1,000 times more cancer than humans, they would likely die before they were able to reproduce and the species would quickly go extinct" yet the species does
30.
by ggrothendieck 9y ago
There is an agent-based model of Balinese irrigation written in NetLogo here: https://www.openabm.org/model/2221/version/3/view

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