thelatemail

thelatemail has asked 18 questions and find answers to 412 problems.

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About

Full-time data monkey with a haircut accurately represented by my avatar. R, SQL, SAS, whatever life throws at me.
Currently teaching myself some GIS.

thelatemail questions

apply() and calculating proportion of first row for all dataframe rows
R - sequence of continuous cases where end1 == start2
gsub - reduce all repeating characters to one instance
cbind items from multiple lists recursively
rbind data.frames without names
Add multiple output variables using purrr and a predefined function
identify groups of linked episodes which chain together
data.table grouping separately on numeric and text variables
pick a random number, always with increasing value over last random number picked
R draw (abline + lm) line-of-best-fit through arbitrary point

thelatemail answers

R elementwise calculations in dataframe which contains lists
Sum a list of matrices in R
get sum of the product of two columns
Rearranging dataframes in R [duplicate]
Use R to combine duplicate columns
How to create adjacency matrix from grid coordinates in R?
Select rows until last non-missing value by group using data.table
Calculating median for each column of grouped data
How does OR condition work in R?
expand data.frame to long format and increment value