Matthew Plourde

Matthew Plourde has asked 6 questions and find answers to 301 problems.

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Matthew Plourde questions

Installing plpythonu on Windows
Why are these expressions not identical?
Load, detach, re-load anomaly
as(x, 'double') and as.double(x) are inconsistent

Matthew Plourde answers

Collapse dataframe by name, where integer columns are summed and factor columns are pasted
why R discard decimal when as.numeric is applied?
R Date format with months and days of two digits
regarding the difference, intersection and union of two vectors
Ordered dataframe not same order when ggplotting [duplicate]
How can I use attr<- with lapply?
Merge and paste duplicate columns in R
compare column names and make new table
Reduce List but avoid Null variables
Converting a list of tokens to n-grams