Matt Dowle

Matt Dowle has asked 17 questions and find answers to 347 problems.

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Project homepage | Datacamp data.table online course

Matt Dowle questions

Is there a way for R to run a script and on error return non-0 to the shell?
Strange difference between x and get("x")?
Can R create a barplot image with clickable bars to insert on a webpage?
How to run a package's testthat tests
Is there a way to run an expression on.exit() but only if completes normally, not on error?
Is there a way to `source()` and continue after an error?
There is pmin and pmax each taking na.rm, why no psum?
Is this the fastest way to group in Pandas?
Why has data.table defined := rather than overloading <-?
What are the "standard unambiguous date" formats for string-to-date conversion in R?

Matt Dowle answers

fill gaps in a timeseries with averages
How to match two data.frames with an inexact matching identifier (one identifier has to be in the range of the other)
Removing time series with only zero values from a data frame
datatable.integer64 argument is not working for me should it?
grouping on string fields in R
reading csv files in a for loop and assigning dataframe names [duplicate]
left outer join with data.table with different names for key variables
":=" changes another data.table [duplicate]
"object 'ansvals' not found" error - what does it mean?
Should data.table's CJ continue accommodating arguments with duplicate elements?