Try this:
a <- scan('dureetasks.txt')
hist(a)
On Sat, Aug 21, 2010 at 10:32 AM, Adel ESSAFI <adeless...@gmail.com> wrote:
> Hi
> In fact, I searching for a simpler solution. I remember that I have done
> this without these functions (but I forgot)
> simply, is there any function that "force" R to take variable a as table ?
>
> Regards
> Adel
>
>
>
> > a=read.table("dureetasks.txt")
> > summary(a)
> V1
> Min. : 1
> 1st Qu.: 77
> Median : 2658
> Mean : 25802
> 3rd Qu.: 42558
> Max. :1575814
> > hist(a);
> Error in hist.default(a) : 'x' must be numeric
>
>
>
> 2010/8/21 Gavin Simpson <gavin.simp...@ucl.ac.uk>
>
> > On Sat, 2010-08-21 at 11:37 +0200, Adel ESSAFI wrote:
> > > Hi list
> > >
> > > I loaded the content of a file dureetasks.txt to variable a. This file
> > > contains an interger per line.
> > > when I print a vector, it displays correctly.
> > > however, when I try to print the histogram, I get this error message
> > >
> > > > a=read.table("dureetasks.txt")
> > > > hist(a)
> > > Error in hist.default(a) : 'x' must be numeric
> > >
> > > Can you help please?
> >
> > class(a)
> >
> > str(a)
> >
> > > a <- data.frame(x = rnorm(100))
> > > hist(a)
> > Error in hist.default(a) : 'x' must be numeric
> >
> > So I suspect a is a data frame with a single column/variable. You need
> > to pass hist the vector from /inside/ a that you want to plot:
> >
> > > with(a, hist(x))
> >
> > is one way to do that. Note that 'x' is used because that is the name of
> > the variable (component really) in a that I want to plot:
> >
> > > names(a)
> > [1] "x"
> >
> > You will need to work out what the correct name is for the component you
> > want to plot. If there was no header to your text file then IIRC the
> > variable will be named X1, but run names(a) and see what it returns.
> >
> > Because we don't have your dureetasks.txt file, there is no way for me
> > to clarify that this is the problem and nothing else. If you can't send
> > us data at the very least use tools like str(a) and class(a), and
> > head(a) to show us what the data look like.
> >
> > HTH
> >
> > G
> >
> > >
> > > regards
> > >
> > >
> > >
> > >
> > > ______________________________________________
> > > R-help@r-project.org mailing list
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> > > 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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> > Dr. Gavin Simpson [t] +44 (0)20 7679 0522
> > ECRC, UCL Geography, [f] +44 (0)20 7679 0565
> > Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk
> > Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/<
> http://www.ucl.ac.uk/%7Eucfagls/>
> > UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
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> >
> >
>
>
> --
> PhD candidate in Computer Science
> Address
> 3 avenue lamine, cité ezzahra, Sousse 4000
> Tunisia
> tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
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>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
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>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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