column selection in list

Hi,

Try this,

a = replicate(3, data.frame(x=1:10, y=rnorm(10)), simplify=FALSE)

lapply(a, "[", "y")

HTH,

baptiste

2010/1/22 Ivan Calandra <ivan.calandra at uni-hamburg.de>:
Hi everybody!

I have a (stupid) question but I cannot find a way to do it!

I have a list like:
SPECSHOR_tx_Asfc
$cotau
? SPECSHOR Asfc.median
38 ? ?cotau ? ?381.0247
39 ? ?cotau ? ?154.6280
40 ? ?cotau ? ?303.3219
41 ? ?cotau ? ?351.2933
42 ? ?cotau ? ?156.5327
$eqgre
? ?SPECSHOR Asfc.median
145 ? ?eqgre ? ?219.5389
146 ? ?eqgre ? ?162.5926
147 ? ?eqgre ? ?146.3726
148 ? ?eqgre ? ?127.6413
149 ? ?eqgre ? ?274.2888
$gicam
? ?SPECSHOR Asfc.median
263 ? ?gicam ? ?174.7445
264 ? ?gicam ? ? 83.4821
265 ? ?gicam ? ?157.6005
266 ? ?gicam ? ?153.7519
267 ? ?gicam ? ?344.9775

I would just like to remove the column "SPECSHOR" (or extract the other one)
so that it looks like
$cotau
? ?Asfc.median
38 ? ? ? ?381.0247
39 ? ? ? 154.6280
40 ? ? ? ?303.3219
41 ? ? ? ?351.2933
42 ? ? ? ?156.5327
etc.

How should I do it? I know how to select each element like
SPECSHOR_tx_Asfc[[1]], but I don't know how to select a single column within
an element.

Could you please help me on that?

Thanks
Ivan

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column selection in list

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