On Jan 20, 2010, at 11:10 PM, Tena Sakai wrote:
Hi,
When I emulate what's suggested I get an error (shown below).
What does this mean?
Thank you.
Province <- c(1, 1, 13)
District <- c(1, 2, 2)
df$Distric_Unique <- with(df, paste(Province, District, sep=".") )
Error in eval(substitute(expr), data, enclos = parent.frame()) :
invalid 'envir' argument
You said you had 2 columns, and you wanted something that looked like
a dataframe, so I assumed you were thinking these were columns of a
dataframe. I further assumed you would know enough to substitute
whatever the name of your dataframe might have been for the "df"
object. Since you don't, all you need to do is:
> paste(Province, District, sep=".")
[1] "1.1" "1.2" "13.2"
Regards,
Tena Sakai
tsa...@gallo.ucsf.edu
On 1/20/10 6:45 PM, "David Winsemius" <dwinsem...@comcast.net> wrote:
On Jan 20, 2010, at 9:34 PM, teurlai magali wrote:
Hi
is there a way in R to create a new column vector with the numbers
of 2 others columns simply appended?
Example : I have a column with provinces codes (1 to 19)
I have a second column with districts codes (1 to ##, depending on
the province)
I want to create a third column with a code that would be unique for
each district:
Province District District_Unique
1 1 11
1 2 12
13 2 132
Better to put in a separator. That way you can tell Prov=1, Distr=11
from Prov=11, Distr=1. Try:
df$Distric_Unique <- with(df, paste(Province, District, sep=".") )
I can create a loop, but it becomes complicated with numerous data
Thanks for your help
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