I want to use weka
to predict future instances. I have a csv
file and a small portion of it is as following:
I used r
to read the file but I am not sure how to substitute the zeros with "No error" and anything besides zero to "Error". I would have left like this but unfortunately weka
is not able to predict instances with numbers as the status.
Edit 2: I tried your solution and even though it changed the numbbers to error/no error, it erased the other columns. Did I do something wrong? I also wrote it to a file so it would be easier to see.
Edit 3:
dput(data)
structure(list(BoxType = structure(c(3L, 3L, 6L, 6L, 3L, 8L,
3L, 3L, 6L, 4L, 4L, 3L, 3L, 4L, 6L, 6L, 3L, 6L, 2L, 4L, 3L, 3L,
8L, 3L, 6L, 8L, 2L, 3L, 8L, 8L, 3L, 8L, 2L, 2L, 8L, 8L, 2L, 3L,
8L, 3L, 4L, 3L, 3L, 3L, 2L, 2L, 6L, 4L, 3L, 4L, 4L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 3L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 3L, 4L, 2L, 6L, 6L, 4L, 4L, 4L, 6L, 3L, 4L, 6L, 3L,
3L, 2L, 2L, 6L, 3L, 3L, 3L, 2L, 6L, 8L, 3L, 8L, 3L, 4L, 3L, 8L,
6L, 2L, 6L, 6L, 3L, 3L, 4L, 3L, 4L, 4L, 2L, 4L, 2L, 3L, 2L, 6L,
3L, 3L, 4L, 3L, 3L, 6L, 3L, 6L, 3L, 3L, 4L, 6L, 4L, 4L, 3L, 4L,
4L, 2L, 6L, 2L, 6L, 6L, 3L, 3L, 4L, 3L, 4L, 6L, 3L, 4L, 6L, 6L,
4L, 4L, 3L, 6L, 4L, 4L, 3L, 4L, 6L, 3L, 6L, 2L, 3L, 2L, 2L, 6L,
4L, 4L, 3L, 6L, 4L, 3L, 4L, 4L, 4L, 3L, 3L, 3L, 3L, 2L, 6L, 6L,
6L, 3L, 2L, 3L, 3L, 4L, 4L, 3L, 6L, 3L, 4L, 3L, 3L, 3L, 3L, 8L,
6L, 3L, 6L, 2L, 8L, 2L, 3L, 3L, 6L, 3L, 2L, 2L, 3L, 4L, 6L, 2L,
6L, 3L, 3L, 4L, 6L, 3L, 4L, 4L, 4L, 2L, 4L, 3L, 6L, 3L, 3L, 3L,
4L, 3L, 3L, 2L, 4L, 3L, 3L, 3L, 2L, 3L, 4L, 6L, 3L, 3L, 3L, 2L,
3L, 6L, 3L, 3L, 3L, 3L, 3L, 6L, 8L, 4L, 3L, 3L, 2L, 7L, 8L, 6L,
6L, 4L, 6L, 8L, 3L, 2L, 4L, 4L, 6L, 3L, 2L, 6L, 8L, 4L, 6L, 4L,
4L, 4L, 3L, 3L, 3L, 6L, 4L, 4L, 3L, 3L, 3L, 6L, 6L, 3L, 6L, 6L,
6L, 4L, 4L, 3L, 2L, 4L, 3L, 6L, 3L, 4L, 4L, 4L, 4L, 2L, 2L, 3L,
4L, 4L, 3L, 3L, 3L, 3L, 4L, 3L, 6L, 3L, 6L, 6L, 4L, 4L, 2L, 3L,
4L, 4L, 4L, 6L, 6L, 4L, 4L, 4L, 4L, 2L, 3L, 4L, 4L, 3L, 4L, 4L,
4L, 3L, 6L, 3L, 6L, 3L, 6L, 3L, 6L, 6L, 3L, 3L, 3L, 3L, 3L, 6L,
6L, 3L, 6L, 3L, 1L, 1L, 3L, 3L, 3L, 3L, 2L, 3L, 3L, 3L, 6L, 3L,
3L, 3L, 2L, 4L, 4L, 3L, 6L, 3L, 2L, 7L, 3L, 3L, 3L, 2L, 3L, 2L,
3L, 4L, 2L, 2L, 3L, 4L, 3L, 3L, 4L, 1L, 6L, 3L, 2L, 3L, 3L, 7L,
4L, 4L, 3L, 2L, 4L, 2L, 4L, 3L, 3L, 3L, 3L, 6L, 2L, 4L, 2L, 4L,
4L, 4L, 3L, 3L, 3L, 6L, 6L, 3L, 7L, 6L, 3L, 3L, 3L, 4L, 4L, 3L,
6L, 4L, 3L, 7L, 4L, 6L, 6L, 2L, 2L, 4L, 3L, 4L, 4L, 2L, 4L, 4L,
7L, 3L, 4L, 6L, 4L, 6L, 3L, 2L, 3L, 3L, 4L, 4L, 2L, 4L, 3L, 4L,
3L, 3L, 4L, 6L, 2L, 2L, 6L, 6L, 6L, 2L, 3L, 4L, 4L, 3L, 8L, 6L,
4L, 4L, 3L, 3L, 5L, 6L, 2L, 3L, 4L, 8L, 6L, 8L, 4L, 4L, 7L, 4L,
6L, 8L, 4L, 2L, 6L, 6L, 4L, 4L, 1L, 1L, 1L, 1L, 2L, 3L, 3L, 2L,
6L, 8L, 4L, 3L, 1L, 6L, 6L, 1L, 1L, 1L, 4L, 4L, 8L, 3L, 3L, 2L,
2L, 4L, 8L, 6L, 4L, 8L, 3L, 3L, 3L, 5L, 4L, 1L, 2L, 2L, 3L, 4L,
2L, 5L, 4L, 8L, 3L, 8L, 2L, 3L, 4L, 8L, 3L, 6L, 3L, 6L, 6L, 3L,
3L, 8L, 8L, 3L, 6L, 3L, 3L, 2L, 5L, 3L, 6L, 3L, 2L, 3L, 3L, 3L,
4L, 3L, 4L, 3L, 4L, 3L, 2L, 2L, 3L, 6L, 4L, 6L, 3L, 3L, 6L, 3L,
4L, 3L, 2L, 3L, 4L, 4L, 4L, 6L, 6L, 3L, 6L, 4L, 7L, 8L, 6L, 8L,
8L, 4L, 6L, 4L, 4L, 3L, 4L, 2L, 3L, 2L, 4L, 6L, 4L, 6L, 4L, 6L,
4L, 6L, 3L, 4L, 3L, 6L, 4L, 4L, 8L, 4L, 8L, 3L, 3L, 6L, 6L, 3L,
4L, 3L, 3L, 3L, 3L, 6L, 3L, 3L, 3L, 4L, 2L, 4L, 3L, 3L, 6L, 6L,
4L, 3L, 2L, 3L, 6L, 4L, 3L, 3L, 2L, 3L, 2L, 6L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 2L, 3L, 3L, 6L, 6L, 2L, 3L, 6L, 3L, 2L, 3L, 6L,
4L, 3L, 3L, 3L, 6L, 6L, 4L, 3L, 8L, 8L, 4L, 3L, 2L, 2L, 3L, 2L,
3L, 8L, 2L, 3L, 6L, 3L, 3L, 4L, 3L, 3L, 4L, 3L, 3L, 3L, 3L, 8L,
8L, 2L, 3L, 3L, 2L, 2L, 3L, 2L, 2L, 6L, 2L, 3L, 6L, 6L, 8L, 3L,
4L, 3L, 3L, 6L, 6L, 3L, 3L, 3L, 2L, 6L, 2L, 3L, 6L, 8L, 3L, 4L,
4L, 6L, 4L, 8L, 4L, 4L, 2L, 6L, 8L, 6L, 4L, 8L, 3L, 8L, 1L, 8L,
2L, 2L, 2L, 2L, 3L, 3L, 6L, 3L, 3L, 6L, 3L, 3L, 3L, 2L, 3L, 3L,
3L, 2L, 4L, 3L, 4L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 2L, 3L,
3L, 6L, 3L, 3L, 6L, 3L, 2L, 3L, 3L, 3L, 4L, 3L, 3L, 1L, 1L, 1L,
1L, 3L, 3L, 3L, 3L, 6L, 4L, 3L, 3L, 6L, 3L, 6L, 6L, 4L, 6L, 4L,
6L, 4L, 4L, 6L, 6L, 6L, 3L, 6L, 3L, 3L, 3L, 2L, 3L, 3L, 3L, 3L,
2L, 2L, 8L, 4L, 4L, 6L, 4L, 8L, 6L, 4L, 3L, 4L, 3L, 4L, 6L, 4L,
6L, 6L, 6L, 4L, 6L, 6L, 4L, 4L, 4L, 2L, 6L, 4L, 2L, 4L, 4L, 3L,
4L, 6L, 6L, 6L, 3L, 4L, 6L, 4L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 2L,
8L, 4L, 4L, 6L, 2L, 8L, 8L, 4L, 6L, 3L, 4L, 8L, 8L, 5L, 3L, 2L,
4L, 3L, 4L, 6L, 4L, 3L, 4L, 3L, 4L, 4L, 4L, 3L, 3L, 3L, 4L, 3L,
6L, 4L, 6L, 6L, 6L, 2L, 3L, 6L, 6L, 3L, 4L, 3L, 2L, 8L, 4L, 8L,
8L, 3L, 3L, 4L, 6L, 6L, 4L, 6L, 6L, 3L, 4L, 4L, 4L, 3L, 7L, 4L,
6L), .Label = c("", "IPH8005", "ISB7005", "VIP1200", "VIP1216",
"VIP1232", "VIP2262NA", "VIP2502W"), class = "factor"), BoxVendor = structure(c(2L,
2L, 3L, 3L, 2L, 3L, 2L, 2L, 3L, 3L, 3L, 2L, 2L, 3L, 3L, 3L, 2L,
3L, 4L, 3L, 2L, 2L, 3L, 2L, 3L, 3L, 4L, 2L, 3L, 3L, 2L, 3L, 4L,
4L, 3L, 3L, 4L, 2L, 3L, 2L, 3L, 2L, 2L, 2L, 4L, 4L, 3L, 3L, 2L,
3L, 3L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 3L, 4L, 3L, 3L, 3L, 3L, 3L,
3L, 2L, 3L, 3L, 2L, 2L, 4L, 4L, 3L, 2L, 2L, 2L, 4L, 3L, 3L, 2L,
3L, 2L, 3L, 2L, 3L, 3L, 4L, 3L, 3L, 2L, 2L, 3L, 2L, 3L, 3L, 4L,
3L, 4L, 2L, 4L, 3L, 2L, 2L, 3L, 2L, 2L, 3L, 2L, 3L, 2L, 2L, 3L,
3L, 3L, 3L, 2L, 3L, 3L, 4L, 3L, 4L, 3L, 3L, 2L, 2L, 3L, 2L, 3L,
3L, 2L, 3L, 3L, 3L, 3L, 3L, 2L, 3L, 3L, 3L, 2L, 3L, 3L, 2L, 3L,
4L, 2L, 4L, 4L, 3L, 3L, 3L, 2L, 3L, 3L, 2L, 3L, 3L, 3L, 2L, 2L,
2L, 2L, 4L, 3L, 3L, 3L, 2L, 4L, 2L, 2L, 3L, 3L, 2L, 3L, 2L, 3L,
2L, 2L, 2L, 2L, 3L, 3L, 2L, 3L, 4L, 3L, 4L, 2L, 2L, 3L, 2L, 4L,
4L, 2L, 3L, 3L, 4L, 3L, 2L, 2L, 3L, 3L, 2L, 3L, 3L, 3L, 4L, 3L,
2L, 3L, 2L, 2L, 2L, 3L, 2L, 2L, 4L, 3L, 2L, 2L, 2L, 4L, 2L, 3L,
3L, 2L, 2L, 2L, 4L, 2L, 3L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 2L,
2L, 4L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 4L, 3L, 3L, 3L, 2L, 4L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 2L, 2L, 3L, 3L, 3L, 2L, 2L, 2L,
3L, 3L, 2L, 3L, 3L, 3L, 3L, 3L, 2L, 4L, 3L, 2L, 3L, 2L, 3L, 3L,
3L, 3L, 4L, 4L, 2L, 3L, 3L, 2L, 2L, 2L, 2L, 3L, 2L, 3L, 2L, 3L,
3L, 3L, 3L, 4L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 2L,
3L, 3L, 2L, 3L, 3L, 3L, 2L, 3L, 2L, 3L, 2L, 3L, 2L, 3L, 3L, 2L,
2L, 2L, 2L, 2L, 3L, 3L, 2L, 3L, 2L, 1L, 1L, 2L, 2L, 2L, 2L, 4L,
2L, 2L, 2L, 3L, 2L, 2L, 2L, 4L, 3L, 3L, 2L, 3L, 2L, 4L, 3L, 2L,
2L, 2L, 4L, 2L, 4L, 2L, 3L, 4L, 4L, 2L, 3L, 2L, 2L, 3L, 1L, 3L,
2L, 4L, 2L, 2L, 3L, 3L, 3L, 2L, 4L, 3L, 4L, 3L, 2L, 2L, 2L, 2L,
3L, 4L, 3L, 4L, 3L, 3L, 3L, 2L, 2L, 2L, 3L, 3L, 2L, 3L, 3L, 2L,
2L, 2L, 3L, 3L, 2L, 3L, 3L, 2L, 3L, 3L, 3L, 3L, 4L, 4L, 3L, 2L,
3L, 3L, 4L, 3L, 3L, 3L, 2L, 3L, 3L, 3L, 3L, 2L, 4L, 2L, 2L, 3L,
3L, 4L, 3L, 2L, 3L, 2L, 2L, 3L, 3L, 4L, 4L, 3L, 3L, 3L, 4L, 2L,
3L, 3L, 2L, 3L, 3L, 3L, 3L, 2L, 2L, 3L, 3L, 4L, 2L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 3L, 3L, 3L, 3L, 1L, 1L, 1L,
1L, 4L, 2L, 2L, 4L, 3L, 3L, 3L, 2L, 1L, 3L, 3L, 1L, 1L, 1L, 3L,
3L, 3L, 2L, 2L, 4L, 4L, 3L, 3L, 3L, 3L, 3L, 2L, 2L, 2L, 3L, 3L,
1L, 4L, 4L, 2L, 3L, 4L, 3L, 3L, 3L, 2L, 3L, 4L, 2L, 3L, 3L, 2L,
3L, 2L, 3L, 3L, 2L, 2L, 3L, 3L, 2L, 3L, 2L, 2L, 4L, 3L, 2L, 3L,
2L, 4L, 2L, 2L, 2L, 3L, 2L, 3L, 2L, 3L, 2L, 4L, 4L, 2L, 3L, 3L,
3L, 2L, 2L, 3L, 2L, 3L, 2L, 4L, 2L, 3L, 3L, 3L, 3L, 3L, 2L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 3L, 4L, 2L, 4L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 3L, 2L, 3L, 3L, 3L, 3L, 3L, 3L,
2L, 2L, 3L, 3L, 2L, 3L, 2L, 2L, 2L, 2L, 3L, 2L, 2L, 2L, 3L, 4L,
3L, 2L, 2L, 3L, 3L, 3L, 2L, 4L, 2L, 3L, 3L, 2L, 2L, 4L, 2L, 4L,
3L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 4L, 2L, 2L, 3L, 3L, 4L, 2L,
3L, 2L, 4L, 2L, 3L, 3L, 2L, 2L, 2L, 3L, 3L, 3L, 2L, 3L, 3L, 3L,
2L, 4L, 4L, 2L, 4L, 2L, 3L, 4L, 2L, 3L, 2L, 2L, 3L, 2L, 2L, 3L,
2L, 2L, 2L, 2L, 3L, 3L, 4L, 2L, 2L, 4L, 4L, 2L, 4L, 4L, 3L, 4L,
2L, 3L, 3L, 3L, 2L, 3L, 2L, 2L, 3L, 3L, 2L, 2L, 2L, 4L, 3L, 4L,
2L, 3L, 3L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 3L, 3L, 3L, 3L,
3L, 2L, 3L, 1L, 3L, 4L, 4L, 4L, 4L, 2L, 2L, 3L, 2L, 2L, 3L, 2L,
2L, 2L, 4L, 2L, 2L, 2L, 4L, 3L, 2L, 3L, 4L, 4L, 2L, 2L, 2L, 2L,
2L, 2L, 4L, 4L, 2L, 2L, 3L, 2L, 2L, 3L, 2L, 4L, 2L, 2L, 2L, 3L,
2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L, 3L, 2L, 2L, 3L, 2L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 3L, 2L, 2L, 2L,
4L, 2L, 2L, 2L, 2L, 4L, 4L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L,
3L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 3L,
3L, 4L, 3L, 3L, 2L, 3L, 3L, 3L, 3L, 2L, 3L, 3L, 3L, 2L, 2L, 2L,
2L, 2L, 2L, 4L, 4L, 3L, 3L, 3L, 3L, 4L, 3L, 3L, 3L, 3L, 2L, 3L,
3L, 3L, 3L, 2L, 4L, 3L, 2L, 3L, 3L, 3L, 2L, 3L, 2L, 3L, 3L, 3L,
2L, 2L, 2L, 3L, 2L, 3L, 3L, 3L, 3L, 3L, 4L, 2L, 3L, 3L, 2L, 3L,
2L, 4L, 3L, 3L, 3L, 3L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 3L,
3L, 3L, 2L, 3L, 3L, 3L), .Label = c("", "CISCO", "MOTOROLA",
"PACE"), class = "factor"), Receiver_TotalVideoDecoderErrors = c(3L,
204L, 0L, 0L, 3393L, 909L, 1556L, 48L, 0L, 0L, 0L, 182L, 19L,
0L, 0L, 0L, 77L, 0L, 0L, 0L, 6L, 1002L, 10L, 0L, 0L, 6938L, 0L,
299L, 49L, 245L, 0L, 41L, 0L, 0L, 717L, 31L, 0L, 75L, 37L, 71L,
0L, 40L, 0L, 0L, 0L, 0L, 0L, 0L, 1L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 0L, 1230L, 1230L, 1230L, 1230L, 1230L, 1230L, 1230L, 1230L,
1230L, 1230L, 1230L, 1230L, 1230L, 1230L, 1230L, 1230L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 22L, 0L, 0L, 1384L, 95L, 0L, 0L,
0L, 437L, 119L, 910L, 0L, 0L, 8679L, 20L, 68L, 7L, 0L, 0L, 16L,
0L, 0L, 0L, 0L, 74L, 1L, 0L, 82L, 0L, 0L, 0L, 0L, 0L, 21L, 0L,
0L, 279L, 40L, 0L, 1483L, 3L, 0L, 132L, 0L, 0L, 171L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 90L, 0L, 0L, 0L, 0L,
0L, 111L, 0L, 0L, 0L, 0L, 0L, 18L, 0L, 0L, 0L, 217L, 0L, 0L,
1687L, 0L, 0L, 25L, 0L, 0L, 0L, 0L, 0L, 60L, 0L, 0L, 7L, 0L,
0L, 0L, 0L, 1L, 20L, 0L, 0L, 0L, 0L, 0L, 230L, 0L, 169L, 0L,
0L, 0L, 889L, 0L, 3L, 0L, 48L, 2951L, 10L, 531L, 0L, 0L, 0L,
0L, 0L, 232L, 0L, 0L, 125L, 0L, 39L, 0L, 0L, 262L, 0L, 0L, 0L,
0L, 1270L, 6L, 0L, 0L, 88L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 297L,
124L, 419L, 0L, 483L, 280L, 0L, 0L, 127L, 93L, 368L, 0L, 209571L,
0L, 0L, 21L, 62L, 11L, 0L, 501L, 0L, 169L, 34L, 32L, 25L, 188L,
0L, 1596L, 0L, 41L, 183L, 0L, 805L, 3L, 0L, 0L, 0L, 0L, 297L,
90L, 0L, 0L, 0L, 0L, 691L, 0L, 0L, 4L, 0L, 0L, 0L, 0L, 0L, 23L,
52L, 0L, 0L, 0L, 0L, 58L, 18L, 93L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 9L, 0L, 0L, 11381L, 0L, 34L, 0L, 0L, 26L, 0L, 0L, 0L, 318L,
0L, 0L, 36L, 0L, 6534L, 22L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
0L, 18L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 35L, 0L, 0L,
30L, 0L, 0L, 0L, 51L, 0L, 7L, 0L, 84L, 0L, 9L, 0L, 0L, 48L, 65L,
23L, 0L, 60312L, 0L, 0L, 28L, 0L, 32L, 0L, 0L, 283L, 406L, 44L,
0L, 0L, 0L, 2L, 824L, 0L, 0L, 2487L, 95L, 0L, 0L, 0L, 0L, 0L,
56L, 0L, 1L, 4640L, 12L, 3626L, 0L, 0L, 0L, 420L, 0L, 0L, 0L,
49L, 0L, 78L, 8L, 0L, 0L, 0L, 380L, 0L, 0L, 7L, 1194L, 0L, 0L,
0L, 0L, 0L, 0L, 0L, 29L, 489L, 584L, 47L, 2L, 0L, 0L, 0L, 0L,
0L, 0L, 899L, 120L, 0L, 0L, 0L, 26L, 656L, 0L, 0L, 0L, 50L, 0L,
0L, 0L, 0L, 0L, 6L, 14L, 0L, 0L, 0L, 0L, 0L, 0L, 89L, 0L, 0L,
0L, 0L, 0L, 104L, 0L, 0L, 0L, 0L, 0L, 217L, 0L, 50L, 14L, 0L,
0L, 0L, 0L, 21L, 0L, 73L, 403L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L,
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)), .Names = c("BoxType", "BoxVendor", "Receiver_TotalVideoDecoderErrors"
), class = "data.frame", row.names = c(NA, -999L))
ifelse
wayAssuming your CSV has been loaded into a data frame called boxdata
with the same column names as in the CSV:
ifelse(boxdata$Receiver_TotalVideoDecoderErrors, 'Error', 'No error')
The best way to demonstrate ifelse
is by example:
x <- 1:5
x_lessthan_4 <- x < 4
x_lessthan_4
# [1] TRUE TRUE TRUE FALSE FALSE
if_lessthan_4 <- -x
if_lessthan_4
# [1] -1 -2 -3 -4 -5
if_notlessthan_4 <- x + 100
if_notlessthan_4
# [1] 101 102 103 104 105
ifelse(test = if_notlessthan_4,
yes = if_lessthan_4,
no = if_notlessthan_4)
# [1] -1 -2 -3 104 105
Hopefully it's clear what this function does. Obviously you don't need to always name the arguments as long as they're in the right order; I'm just doing it here so you can see exactly what's going on.
However, you'll notice that the expression
ifelse(boxdata$Receiver_TotalVideoDecoderErrors, 'Error', 'No error')
does not conform to this standard. It works because two things happen "under the hood":
test
is "coerced" to logical, so if I pass in something like test = c(1, 3, 0)
the value of test
will be replaced with as.logical(test)
, so test = c(1, 3, 0)
becomes test = c(TRUE, TRUE, FALSE)
.yes
and no
are "recycled" if they are shorter than test
, and truncated if they are longer.Recycling is again best demonstrated by example:
test <- c(TRUE, FALSE, TRUE, TRUE, FALSE)
yes <- c(1, 2, 3)
no <- c(99, 100, 101, 102, 103, 104)
c(length(test), length(yes), length(no))
# [1] 5 3 6
ifelse(test, yes, no)
# [1] 1 100 3 1 103
These things are documented, but they're easy to miss if you're not used to reading the R help files.
And finally, the help file also says this, which is worth pointing out:
Missing values in
test
give missing values in the result.
This means that ifelse(c(NA, 1, 0, 1), 99, 100)
returns c(NA, 99, 100, 99)
.
So
ifelse(boxdata$Receiver_TotalVideoDecoderErrors, 'Error', 'No error')
is equivalent to
test <- as.logical(boxdata$Receiver_TotalVideoDecoderErrors)
yes <- rep('Error', length(test))
no <- rep('No error', length(test))
ifelse(test, yes, no)
Or let argument recycling to do the work for you. Shorter and more efficient, but maybe less readable to someone who isn't familiar with R:
c('No error', 'Error')[as.logical(boxdata$Receiver_TotalVideoDecoderErrors) + 1]
or
c('Error', 'No error')[!as.logical(boxdata$Receiver_TotalVideoDecoderErrors) + 1]
First, the statement
as.logical(boxdata$Receiver_TotalVideoDecoderErrors) + 1
is equivalent to:
i <- as.logical(boxdata$Receiver_TotalVideoDecoderErrors)
i <- as.numeric(i) # FALSE -> 0, TRUE -> 1
i <- i + rep(1, length(i))
Finally, recycling is applied to subsetting as well:
c('No error', 'Error')[c(1, 2, 1, 1, 2)]
# [1] "No error" "Error" "No error" "No error" "Error"
So the entire thing is equivalent to:
i <- as.logical(boxdata$Receiver_TotalVideoDecoderErrors)
i <- as.numeric(i)
i <- i + rep(1, length(i))
c('No error', 'Error')[i]
This way doesn't need much explanation. It's a lot more typing but it's easy to read and it's flexible:
x <- boxdata$Receiver_TotalVideoDecoderErrors
x[x > 0] <- 'Error'
x[x == 0] <- 'No error'