That's no table that's a data.frame :).
For what you want probably the easiest way is
aggregate. Type ?aggregate for the help information
Based on your example and assuming the data is called
"mydata" this shold do what you want.
aggregate(mydata[,2:3], by=list(item=mydata$Item),
sum)
---
Note that read.table() reads a table and returns a _data frame_. So it is
the _data frame_ that you want to change (a table is something else in R).
This is a simple application of aggregate(), e.g.
> aggregate(z[-1], list(Item=z$Item), sum)
Item X3d_Plot XY_plot
111 2
2
Hi all:
Im kind of new on R and I need help changing a table. The thing is, i read a
file on R using the read.table command and the table looks like this:
Item 3d Plot XY plot
001 1 0
001 0 1
001 0
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