r Archives - Page 12 of 17

Suppose I have a vector that is nested in a dataframe one or two levels. Is there a quick and dirty way to ...

How can I get the last n characters from a string in R? Is there a function like SQL’s RIGHT? 15 Answers 15

I’d like to check if some variable is defined in R – without getting an error. How can I do this? My attempts ...

A very newbish question, but say I have data like this: test_data <- data.frame( var0 = 100 + c(0, cumsum(runif(49, -20, 20))), var1 ...

I am wondering if there is a function to clear the console in R and, in particular, RStudio I am looking for a ...

I am trying to make a bar graph where the largest bar would be nearest to the y axis and the shortest bar ...

I have a dataframe with a column of p-values and I want to make a selection on these p-values. > pvalues_anova...

I have a large data set and I would like to read specific columns or drop all the others. data <- read.dta("file.dta") I ...

I’m trying to determine if a string is a subset of another string. For example: chars <- "test" value <- "es" I want ...

How would one change this input (with the sequence: time, in, out, files): Time In Out Files 1 2 3 4 2 3 ...