Displaying 2 results from an estimated 2 matches for "_lines_".
2008 Jun 06
2
Plot matrix as many lines
Suppose that I have a matrix like:
m <- rbind(c(1,2,3,4), c(2,3,2,1))
Is there any way to efficiently plot the _lines_ as if
I was doing:
plot(m[1,], type="l")
points(m[2,], type="l", col="red")
(of course, in the "real world" there much more than
just 2 lines and 4 columns...)
Alberto Monteiro
2008 Jun 06
6
Subsetting to unique values
I want to take the first row of each unique ID value from a data frame.
For instance
> ddTable <-
data.frame(Id=c(1,1,2,2),name=c("Paul","Joe","Bob","Larry"))
I want a dataset that is
Id Name
1 Paul
2 Bob
> unique(ddTable)
Will give me all 4 rows, and
> unique(ddTable$Id)
Will give me c(1,2), but not accompanied by the name column.