Cath

Cath has asked 22 questions and find answers to 119 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

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
Extract row indices of a dataframe whose entries correspond to rows of another dataframe
How to identify the indexes of a series of NA in a vector
How to split each of the columns in a data frame to two column?
Find previous same value in a vector and apply certain conditions
String split and expand the (vector) at the delimiter: R