R loop

Hi

On 6 Feb 2006 at 15:57, ivo welch wrote:

Date sent:      	Mon, 6 Feb 2006 15:57:30 -0500
From:           	ivo welch <ivowel at gmail.com>
To:             	Sean Davis <sdavis2 at mail.nih.gov>
Copies to:      	piet.vanremortel at gmail.com, r-help <r-help at stat.math.ethz.ch>
Subject:        	Re: [R] R loop

data[ data$a == "name2" ]  # does not work and gives a weird
result,  yuck

data[data$a=="name2",]

sorry about this.  I believe a few versions back, one could not subset
data frames, so I did not even check what I wrote.  Works now.

It depends on what you consider few versions back. I started with R 
vesion 1.2.0 about 10 years 

ago and I believe that data frame 
subsetting was done in **very** similar manner as it is performed 
now.

Cheers
Petr

Look at ?order.

I know.  This is why I suggested only that we need a wrapper that
plugs an order() functionality into the sort() function (which
fortunately points in its docs to order)---but novices would find the
sort syntax easier.

regards,

/iaw

Petr Pikal
petr.pikal at precheza.cz