Re: [R] Can I get rid of this for loop using apply?

From: hadley wickham <h.wickham_at_gmail.com>
Date: Thu, 24 Apr 2008 09:24:15 -0500

> Great suggestions. I tested the code on an example and the run time was
> reduced from 1 min 12 sec to 3 sec. Also, I like the suggestion to look at
> the quantiles. I will see what insight it provides in terms of detecting
> masked interactions.

Well that's a decent speed up :)

> I have a couple questions about your code.
> First, why not use
> xs <- seq(min(x1), max(x1), length = 100) instead of
> xs <- with(m, seq(min(x1), max(x1), length = 100)) ?

No real reason, just to make it a bit easier when you generalise to other data sets / models

> Second, what is the function geom_line()? I couldn't find it.

It's in ggplot2 - http://had.co.nz/ggplot2/geom_line.html - ?geom_line should find it too though (provided you have version 0.6 of ggplot2)

Hadley

-- 
http://had.co.nz/

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Received on Thu 24 Apr 2008 - 15:16:44 GMT

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