Re: [R] How to calculate min of a dataset that contains empty column
Presumably there is no reason to attempt plotting an empty column, so best approach is probably to remove the columns that contain no values. Try > f.temp<-f[,-which(apply(f,2,function(x)all(is.na(x] and then run your script for f.temp instead of the original f. Also, you may find you have to use > min(x, na.rm=T) instead of just > min(x) for any other columns that contain NA values as well as real values. Chris Li 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$f[i]) > plot(x,y,ylim=c(ymin,100)) > > The script stops at b, because the min function returns inf value. What > can I do to overcome it? > > Many thanks, > Chris > -- View this message in context: http://www.nabble.com/How-to-calculate-min-of-a-dataset-that-contains-empty-column-tp25463449p25466916.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to calculate min of a dataset that contains empty column
Let's say your data.frame is called xx
Then try:
apply(xx,2, function(x) {min(na.omit(x))} )
Does it work ?
On Wed, Sep 16, 2009 at 2:24 AM, Chris Li wrote:
>
> Hi all,
>
> I have got a dataset like the following:
>
> a b c
> 1 5
> 2
> 3 7
>
> I am taking the minimum of each column and use it as the minimum of the
> y-axis of my graphs. My scripts (simplified version) are like the
> following:
>
> f<-array
> f[1]=a
> f[2]=b
> f[3]=c
> for i in 1:3
> name=f[i]
> ymin<-min(dataset$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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[R] How to calculate min of a dataset that contains empty column
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.
