[R] Condition to factor (easy to remember)

[Ista Zahn]

An extremely verbose, but (in my view) easy to understand approach is:

> data.f <- data; data.f[which(data <= 10)] <- levs[1]; data.f[which(data > 10)] <- levs[2]; data.f <- factor(data.f)

-Ista

On Wed, Sep 30, 2009 at 8:31 AM, Dieter Menne
<dieter.menne at menne-biomed.de> wrote:
>
>
>
> David Winsemius wrote:
>>
>>
>>> # Typical C-Programmer style
>>> factor(levs[as.integer(data >10)+1], levels=levs)
>>
>> In your code the as.integer function is superfluous
>
> Oops... done too much c# lately, getting invalid cast challenged.
>
> Dieter
>
>
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-- 
Ista Zahn
Graduate student
University of Rochester
http://yourpsyche.org