[R] Unable to Plot using headers.

[stephen's mailinglist account]

>> My data is a 2 column 8000 row table (saved as .txt file) imported into
>> R.
>>
>>>demand=read.delim("C:\\Documents and Settings\\E066582\\My
>> Documents\\R\\R-2.13.0\\bin\\demand.txt")
>>
>> First rows with headers are as shown:
>>
>>> demand[1,]
>>
>>        Date Qty
>>
>> 1 12/31/2006   1
>>
>> With two columns Date/Qty.
>>
>> I attempted to plot and received an error. My headers were not found as
>> an object in R...maybe I'm missing something, but I was under the
>> impression I didn't need to create each header as an object...
>>
>>> plot(Qty, Date)
>>
>> Error in plot(Qty, Date) : object 'Qty' not found
>>
>>> plot(Date, Qty)
>>
>> Error in plot(Date, Qty) : object 'Date' not found

> You need to tell R where to find them, since they aren't R objects.
> (You can see all the actual objects with ls().)
>
> Two of the many options:
>
> with(demand, plot(Qty, Date))
>
> plot(demand$Qty, demand$Date)


does it help to tell R that there is a header row in the file?
demand<-read.delim("path\\demand.txt", header=TRUE)

if you want to address Qty and Date directly you could attach (other
options were given above)
attach(demand)
then
plot(Qty, Date)
should work
-- 
Stephen