or even:
colSums(!is.na(mat))
Best, Dimitris
----- Original Message ----- From: "Peter Dalgaard" <[EMAIL PROTECTED]>
To: "Dimitris Rizopoulos" <[EMAIL PROTECTED]>
Cc: ""Luis Rideau Cruz"" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Friday, October 15, 2004 1:43 PM
Subject: Re: [R] length with missing values
"Dimitris Rizopoulos" <[EMAIL PROTECTED]> writes:
Hi Luis,
just use:
apply( mat, 2, function(x) length(x[!is.na(x)]) )
or:
apply(!is.na(mat),2,sum)
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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