Message-ID: <1336501320796-4618267.post@n4.nabble.com>
Date: 2012-05-08T18:22:00Z
From: Rui Barradas
Subject: Help "deleting negative values in a matrix, and do statistic analysis"
In-Reply-To: <1336500746378-4618247.post@n4.nabble.com>
Hello,
york8866 wrote
>
> Hi, John,
>
> the code ran well.
>
> however, somehow, the means were not calculated correctly using the
> following code.
>
> test <- read.csv("Rtestdataset.csv", as.is=T,header=T)
> test <- data.frame(test)
> test
> rowMeans(test)
> apply(test,1,function(y)mean(y>=0))
>
> Is there anything wrong?
> thanks,
>
Yes!!!
It's mean( y[y >= 0] )
Rui Barradas
--
View this message in context: http://r.789695.n4.nabble.com/Help-deleting-negative-values-in-a-matrix-and-do-statistic-analysis-tp4617792p4618267.html
Sent from the R help mailing list archive at Nabble.com.