[R] selection of multiple subscripts

[e-letter]

On 13/01/2010, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
> On 13/01/2010 7:36 AM, e-letter wrote:
>> Readers,
>>
>> For a data set 'x':
>>
>> 1 a
>> 2 b
>> 3 c
>> 4 d
>> 5 e
>> 6 f
>> 7 g
>> 8 h
>> 9 i
>>
>> How to select multiple subscripts to plot? For example to plot values
>> 1:3 and 9:10:
>>
>> plot(x[1:3,1],x[,2])
>>
>> and
>>
>> plot(x[9:10,1],x[,2])
>>
>> into one plot?
>
> Neither of those will work, because your x[,2] vector is longer than the
> other vector.
>
> What you want is something like this:
>
> plot(col2 ~ col1, data=x[c(1:3, 9:10),])
>
Thanks, I now understand the concatenate function would help but
forgot the syntax. Anyway I've just realised that the search database
for R yields no result for '?concatenate' which is surprising.