[R] Creating a column based on data in another column

[Dimitris Rizopoulos]

have a look at ?cut(); for instance,

x <- sample(1000, 20, TRUE)

x
cut(x, c(0, 300, 600, 1000), c("A", "B", "C"))


I hope it helps.

Best,
Dimitris


Mehdi Khan wrote:
> hello all,
> 
> I have a data frame and I want to create a column which assigns a letter
> based upon the value in another column.  The data column has velocities
> ranging from 0 to 1000.  So for example, for velocities between 0 and 300
> I'd like to assign the letter "A" in the new column, for 300-600, "B" and so
> on and so forth.  How would I do this?
> 
> Thank you very much!
> 
> Mehdi Khan
> 
> 	[[alternative HTML version deleted]]
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

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