R help - Jun 2010 - How to convert data frame row to vector?

Hi,
   I have a data frame that looks like this:

   ID
   Var
   Var2
   Var3
   xxx
   100
   909
   920
   yyy
   110
   720
   710
   zzz
   140
   680
   690

   I can load the file and produce a plot from values from one column.
   > data <- read.csv("test.csv")
   > barplot(data$Var2)
   So far it's fine.
   The data frame however has more columns with integer values in reality and I
   want to plot from consecutive values of the SAME ROW.
   Something like:
   > barplot(data[1, 2:3])
   or more generic:
   > barplot(data[row.id, from.field:to.field])
   Unfortunately this no longer is a vector! I understand that it could contain
   non-numeric values which in my data frame is not the case.
   How can I convert a "horizontal" one-line-data-frame into a vector?
   Any help appreciated,
   best regards,
   J??rg

Hi

r-help-bounces at r-project.org napsal dne 14.06.2010 11:05:39:
> 
>    Hi,
>    I have a data frame that looks like this:
> 
>    ID
>    Var
>    Var2
>    Var3
>    xxx
>    100
>    909
>    920
>    yyy
>    110
>    720
>    710
>    zzz
>    140
>    680
>    690
> 
>    I can load the file and produce a plot from values from one column.
>    > data <- read.csv("test.csv")
>    > barplot(data$Var2)
>    So far it's fine.
>    The data frame however has more columns with integer values in 
reality and I
>    want to plot from consecutive values of the SAME ROW.
>    Something like:
>    > barplot(data[1, 2:3])
>    or more generic:
>    > barplot(data[row.id, from.field:to.field])
E.g. unlist
barplot(unlist(data[row.id, from.field:to.field]))

Regards
Petr

>    Unfortunately this no longer is a vector! I understand that it could 
contain
>    non-numeric values which in my data frame is not the case.
>    How can I convert a "horizontal" one-line-data-frame into a
vector?
>    Any help appreciated,
>    best regards,
>    J??rg
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