Cath

Cath has asked 22 questions and find answers to 125 problems.

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I want to live in Theory, everything works there.

Cath questions

How to avoid `all` function returning `TRUE` when comparing to `NULL` or an empty object
fuse melt/dcast in one step
fill a data.table based on value in another data.table
Compute with data.table: how many 2x2 non NA values there are among the variables?
split character columns and get names of field in string
Unexpected behaviour of function table with "NaN" values
Reorder rows in data.table in a specific order

Cath answers

Maximum value of one data.table column based on other columns
How to move X axis from top to bottom on coefficient plot in R (coefplot)?
Need regular expression logic
Ignore second or more consecutive 0
Find the index of minimum non negative value in R
Calculating correlation in data frame in R
Names of the countries on the plot with rworldmap
R- Conditional calculation based on reference to values in other row
Split text by sentence but not by special patterns
Finding time differences by id R