[R] Display the character variables in a dataset in R

[baptiste auguie]

Hi,

If you have a data.frame, perhaps this can help,


tc = textConnection("carat cut color clarity depth table price x y z
1  0.23     Ideal     E     SI2  61.5    55   326 3.95 3.98 2.43
2  0.21   Premium     E     SI1  59.8    61   326 3.89 3.84 2.31
3  0.23      Good     E     VS1  56.9    65   327 4.05 4.07 2.31
4  0.29   Premium     I     VS2  62.4    58   334 4.20 4.23 2.63
5  0.31      Good     J     SI2  63.3    58   335 4.34 4.35 2.75
6  0.24 'Very Good'     J    VVS2  62.8    57   336 3.94 3.96 2.48")

h = read.table(tc,head=T)
close(tc)

str(h)
'data.frame':	6 obs. of  10 variables:
 $ carat  : num  0.23 0.21 0.23 0.29 0.31 0.24
 $ cut    : Factor w/ 5 levels "Fair","Good",..: 5 4 2 4 2 3
 $ color  : Factor w/ 7 levels "D","E","F","G",..: 2 2 2 6 7 7
 $ clarity: Factor w/ 8 levels "I1","SI2","SI1",..: 2 3 5 4 2 6
 $ depth  : num  61.5 59.8 56.9 62.4 63.3 62.8
 $ table  : num  55 61 65 58 58 57
 $ price  : int  326 326 327 334 335 336
 $ x      : num  3.95 3.89 4.05 4.2 4.34 3.94
 $ y      : num  3.98 3.84 4.07 4.23 4.35 3.96
 $ z      : num  2.43 2.31 2.31 2.63 2.75 2.48

h[ , !sapply(h[2,], is.numeric)]

        cut color clarity
1     Ideal     E     SI2
2   Premium     E     SI1
3      Good     E     VS1
4   Premium     I     VS2
5      Good     J     SI2
6 Very Good     J    VVS2

HTH,

baptiste

2009/8/17 rajclinasia <raj at clinasia.com>:
>
> Hi everyone,
>
> After reading the external file into R it will become a R dataset. Now my
> querry is i want to dispaly only character variables from that dataset.
> please help me in this aspect. if possible send me the code. it will be very
> helpful for us.
>
> Thank you in Advance.
> --
> View this message in context: http://www.nabble.com/Display-the-character-variables-in-a-dataset-in-R-tp25002163p25002163.html
> Sent from the R help mailing list archive at Nabble.com.
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
_____________________________

Baptiste Auguié

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

http://newton.ex.ac.uk/research/emag