[R] Question about making histogram and x must be numeric

[jim holtman]

Most likely the value you are using in the 'hist' function is a
factor.  It would help if you included an 'str' of the object you are
using.

On Sun, Nov 18, 2012 at 4:45 PM, 9man <lucas_9man at hotmail.com> wrote:
> Hello all,
>
> I hope someone of you can help me out, I have searched other posts as well
> but I can't find any solution to the problem I'm dealing with.
>
> I want to make a histogram from the data Telephone Lines
>
> MDGdataset <-read.csv("MDG_dataset_2010.csv", header=T)
> MDGdatasetAdapted <- subset(MDGdataset, select = c(Country_Code,
> Country_Name, Year, GNI.per.capita..Atlas.method..current.US..,
> Telephone.lines..per.100.people., Internet.users..per.100.people.))
> MDGdatasetAdapted
> MDGdatasetAdapted <- na.omit(MDGdatasetAdapted)
> names(MDGdatasetAdapted) <- c("Code","Country","Year","GNI","Telephone
> Lines","Internet Users")
>
> Then I do as follows:
>
> hist(MDGdatasetAdapted$Telephone.Lines, ylab="Frequency", xlab="Telephone
> Lines per 100 people", main="Frequency of telephone lines per 100 people",
> nclass=100)
>
> To give an example, the first 2 lines of the MDGdatasetAdapted dataset look
> like this:
>   Country_Code                            Country_Name Year
> GNI.per.capita..Atlas.method..current.US.. Telephone.lines..per.100.people.
> Internet.users..per.100.people.
>
> 1            AFG                             Afghanistan 2010
> 410                              0.1                             3.7
>
> What am I doing wrong for getting the message:
> Error in hist.default(MDGdatasetAdapted$Telephone.Lines, ylab = "Frequency",
> :
>   'x' must be numeric
>
> ??
> Please help me out I would be eternally grateful
>
>
>
> --
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> Sent from the R help mailing list archive at Nabble.com.
>
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-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.