R help - Apr 2011 - force output dimension of table function

I have a small annoying problem.

When I use the 'table' function on a simple vector it counts the
number of occurences.
So depending on the values of my input vector the function returns a
class of type table with different lengths.

Is there an easy way to tell the table function, the values to expect?

That is
#############
> set.seed(0)
> s<-sample(0:5,5,rep=T)
> s
[1] 5 1 2 3 5
> ts<-table(s)
> ts
s
1 2 3 5
1 1 1 2

##############

And what I wanted was

0 1 2 3 4 5
0 1 1 1 0 2


Thanks

You can do it using factor:

s0<-factor(0:5)
s1<-sample(s0,5,re=T)
s1
   [1] 0 2 2 4 0
   Levels: 0 1 2 3 4 5

table(s1)
   s1
   0 1 2 3 4 5
   2 0 2 0 1 0

Good luck!

-- 
Marcio Pupin Mello

Survey Engineer
Ph.D student in Remote Sensing
National Institute for Space Research (INPE) - Brazil
Laboratory of Remote Sensing in Agriculture and Forestry (LAF)
www.dsr.inpe.br/~mello


Em 4/7/2011 12:37 AM, fisken escreveu:
> I have a small annoying problem.
>
> When I use the 'table' function on a simple vector it counts the
> number of occurences.
> So depending on the values of my input vector the function returns a
> class of type table with different lengths.
>
> Is there an easy way to tell the table function, the values to expect?
>
> That is
> #############
>> set.seed(0)
>> s<-sample(0:5,5,rep=T)
>> s
> [1] 5 1 2 3 5
>> ts<-table(s)
>> ts
> s
> 1 2 3 5
> 1 1 1 2
>
> ##############
>
> And what I wanted was
>
> 0 1 2 3 4 5
> 0 1 1 1 0 2
>
>
> Thanks
>

Hi,

You might try
> table(factor(s, levels = 0:5))
0 1 2 3 4 5
0 1 1 1 0 2

HTH,
Jorge


On Wed, Apr 6, 2011 at 11:37 PM, fisken <> wrote:
> I have a small annoying problem.
>
> When I use the 'table' function on a simple vector it counts the
> number of occurences.
> So depending on the values of my input vector the function returns a
> class of type table with different lengths.
>
> Is there an easy way to tell the table function, the values to expect?
>
> That is
> #############
> > set.seed(0)
> > s<-sample(0:5,5,rep=T)
> > s
> [1] 5 1 2 3 5
> > ts<-table(s)
> > ts
> s
> 1 2 3 5
> 1 1 1 2
>
> ##############
>
> And what I wanted was
>
> 0 1 2 3 4 5
> 0 1 1 1 0 2
>
>
> Thanks
>
> ______________________________________________
> 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.
>
	[[alternative HTML version deleted]]

On Thu, Apr 07, 2011 at 05:37:08AM +0200, fisken wrote:
> When I use the 'table' function on a simple vector it counts the
> number of occurences.
> So depending on the values of my input vector the function returns a
> class of type table with different lengths.
> 
> Is there an easy way to tell the table function, the values to expect?
 
> And what I wanted was
> 
> 0 1 2 3 4 5
> 0 1 1 1 0 2
The solution using factos has already been posted. if you are really
interested in integers only you could also use tabulate():
> tabulate(s)
[1] 1 1 1 0 2

Note that this excludes zero, though.

cu
	Philipp

-- 
Dr. Philipp Pagel
Lehrstuhl f?r Genomorientierte Bioinformatik
Technische Universit?t M?nchen
Wissenschaftszentrum Weihenstephan
Maximus-von-Imhof-Forum 3
85354 Freising, Germany
http://webclu.bio.wzw.tum.de/~pagel/