Let's say your data.frame is called xx

Then try:
apply(xx,2, function(x) {min(na.omit(x))}  )

Does it work ?





On Wed, Sep 16, 2009 at 2:24 AM, Chris Li <chrisli@austwaterenv.com.au>wrote:

>
> Hi all,
>
> I have got a dataset like the following:
>
> a  b  c
> 1      5
> 2
> 3      7
>
> I am taking the minimum of each column and use it as the minimum of the
> y-axis of my graphs. My scripts (simplified version) are like the
> following:
>
> f<-array
> f[1]=a
> f[2]=b
> f[3]=c
> for i in 1:3
> name=f[i]
> ymin<-min(dataset$f[i])
> plot(x,y,ylim=c(ymin,100))
>
> The script stops at b, because the min function returns inf value. What can
> I do to overcome it?
>
> Many thanks,
> Chris
> --
> View this message in context:
> http://www.nabble.com/How-to-calculate-min-of-a-dataset-that-contains-empty-column-tp25463449p25463449.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



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