How to select a range of observations using R

Question

I need to select a range of observations from variable "position" and keep getting errors.

Here is what I have been trying:

newfile <- myfile[which(myfile$position (18300000:18400000), ]

and this error comes up:

Error: unexpected numeric constant in "newfile <- myfile[which(myfile$position 18300000"

please give more information on what you want to do and on the variable `position`. Is it logical, do you want to simply select the rows 183.. to 184... from the dataframe? — Mark Heckmann, Jan 07 '14 at 11:22

Keniajin · Answer 1 · 2014-01-07T11:56:20.930

0

Maybe you can try

newfile <- myfile [myfile$position] [18300000:18400000, ]

if its the vertical position

edited Jan 07 '14 at 11:56

answered Jan 07 '14 at 11:23

Keniajin

score 0 · Accepted Answer · answered Jan 07 '14 at 11:31

0

Almost there, you have to specify that you want the varaible %in% the range:

newfile <- myfile[myfile$position %in% (18300000:18400000), ]

Note that you don't need to use which for this.

answered Jan 07 '14 at 11:31

James

2 Answers2