Aditya,
Please use plan text. HTML is not handled correctly.
Within your last statement it appears you are trying to find the sum of a
logical vector - is.na(). This is what is causing the error.
My guess is that you want to count the number of elements in the second column
that are not NA values. You probably want the following for your last line.
(See ?sum).
nummk <- length(vbm[ !is.na(vbm[ , 2], 2])
## or
nummk <- nrow(vbm[!is.na(vbm[ , 2], ])
## The is.na(vbm[ ,2]) returns a logical vector (for example c(FALSE, TRUE,
TRUE))
Mark
R. Mark Sharp, Ph.D.
Director Primate Records Database
Southwest National Primate Research Center
Director of Scientific Computing
Texas Biomedical Research Institute
P.O. Box 760549
San Antonio, TX 78245-0549
Office telephone: (210)258-9476 (is forwarded to mobile telephone; message are
captured into e-mail.)
Mobile telephone: (210) 218-2868
On Nov 11, 2014, at 3:05 AM, Aditya Singh wrote:
setwd("C:/Documents and
Settings/Administrator/Desktop/Coursera/specdata/specdata")temp=list.files(pattern="*.csv")myfiles=lapply(temp,read.delim)summk=0nummk=0for
(i in 1:10) { vb=data.frame(myfiles[i]) vbm=as.double(vb)
summk=sum(vbm[,2]) nummk=length(vbm[,2]) - sum(is.na(vbm[,2]))}
Aditya
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