---------- Forwarded message ----------
From: Adel ESSAFI <adeless...@gmail.com>
Date: 2010/8/21
Subject: Re: [R] basic hist() question
To: Henrique Dallazuanna <www...@gmail.com>
It works fine.
Could you explain to me why it did not worked for read.table?
regards
Adel
2010/8/21 Henrique Dallazuanna <www...@gmail.com>
> 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
>> > > 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.
>> >
>> > --
>> > %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
>> > 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]
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>> <http://www.ucl.ac.uk/%7Eucfagls/>
>>
>> > UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
>> > %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
>> >
>> >
>>
>>
>> --
>> PhD candidate in Computer Science
>> Address
>> 3 avenue lamine, cité ezzahra, Sousse 4000
>> Tunisia
>> tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
>> fax: +216 71 391 166
>>
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>>
>>
>> ______________________________________________
>> 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.
>>
>>
>
>
> --
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
>
--
PhD candidate in Computer Science
Address
3 avenue lamine, cité ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166
--
PhD candidate in Computer Science
Address
3 avenue lamine, cité ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166
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