I also don't like to use split function because I have like around 800 columns
Date: Thu, 22 Nov 2012 18:08:54 -0800
From: ml-node+s789695n4650496...@n4.nabble.com
To: frespi...@hotmail.com
Subject: RE: Summary statistics for matrix columns
Hi,
How about this:
res<-do.call(cbind,lapply(split(x,col(x)),function(x)
c(summary(x),sd=sd(x),IQR=IQR(x))))
colnames(res)<-colnames(x)
is.matrix(res)
[1] TRUE
res
Col1 Col2 Col3 Col4 Col5 Col6 Col7 Col8
Min. 10.00000 1.00000 17.00000 3.00000 18.00000 11.00000 13.00000 15.00000
1st Qu. 24.75000 29.50000 26.00000 7.75000 40.00000 17.25000 27.50000 34.75000
Median 34.00000 46.00000 42.50000 35.50000 49.50000 23.50000 51.50000 51.50000
Mean 42.50000 42.75000 41.75000 35.75000 44.88000 26.88000 44.75000 50.12000
3rd Qu. 67.75000 58.50000 50.00000 63.25000 54.25000 30.25000 56.25000 70.50000
Max. 74.00000 77.00000 76.00000 70.00000 65.00000 63.00000 79.00000 80.00000
sd 25.05993 27.77846 19.57221 28.40397 16.39196 16.60841 21.97239 25.51995
IQR 43.00000 29.00000 24.00000 55.50000 14.25000 13.00000 28.75000 35.75000
Col9 Col10
Min. 2.00000 6.00000
1st Qu. 24.50000 12.50000
Median 33.50000 48.00000
Mean 34.88000 40.75000
3rd Qu. 45.25000 63.00000
Max. 71.00000 72.00000
sd 24.39811 28.21727
IQR 20.75000 50.50000
A.K.
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