On 3/24/06 9:40 AM, "Helen Cattan" <helen.cattan at="" imm.ox.ac.uk="">
wrote:
> Hi
>
>
>
> Please could someone let me know what format I need to read a file
in to use
> mget. When I try read.table from a .txt file I get the following
error but
> it all works fine whenI type in the Ids individually.
>
>
>
>> probeIds <- read.table("mock4hrids.txt")
>
>> probeIds[1:5,1]
>
> [1] 206641_at 204805_s_at 218032_at 200800_s_at 201010_s_at
>
> 1926 Levels: 200004_at 200042_at 200046_at 200049_at 200053_at ...
> 91816_f_at
>
>> chrObj <- buildChromLocation("hgu133a")
>
>> cPlot(chrObj)
>
>> cColor(probeIds, "red", chrObj)
Helen,
cColor(as.character(probeIds[,1]),"red",chrObj)
May be what you are looking for. Note that cColor is looking for a
vector.
In your code, you passed it a data.frame. The as.character may not be
needed, depending on whether or not cColor coerces from the factor
(note the
"1926 levels" stuff above, signifying that the probeIds are stored in
the
data.frame as a factor).
> Error in mget(x, envir, mode, ifnotfound, inherits) :
>
> invalid first argument
>
>> probeIds2 <-
> c("206641_at","204805_s_at","218032_at","200800_s_at","201010_s_at")
>
>> cColor(probeIds2, "red", chrObj)
And, here, you did indeed pass in a character vector, which worked.
Sean
