FW: [BioC] Type III Sum of Squares Calculation

Man, Michael Michael.Man at pfizer.com
Thu Oct 23 17:29:11 MEST 2003

Andy, thanks.  -michael

-----Original Message-----
From: 	Liaw, Andy [mailto:andy_liaw at merck.com] 
Sent:	Thursday, October 23, 2003 11:05 AM
To:	'Man, Michael'
Subject:	RE: [BioC] Type III Sum of Squares Calculation

Hi Michael,

> Yes, you can use either Perl or R to do automate the task.  
> The key is to get your data in the right format.  Use apply() 
> when you need do large number of loops because it will save 
> the computing time.  

Just want to mention that apply() uses a for() loop, so cannot be faster
than a for loop.  lapply() does use C level for loop, so is fast.  sapply()
and tapply() both call lapply(), so are fast as well.

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