factor level
Tell me how this works out for you. I think R is seeing your "newXaxis" variable as a character variable because there is some non-numeric string in there, then it converts to factor. Try setting stringsAsFactors=FALSE in the read.csv and see if it is then read as character. If it is, try your command again: mydata[,"newXaxis"]<-as.numeric(mydata[,"newXaxis"]) I don't know if this will work. Just guessing. Mike
On Fri, 1 May 2009, phoebe kong wrote:
Hi All, I have problem about the factor features. I read in a .cvs file, a column which is supposed to be numeric, but it becomes factor level data after reading in. mydata[,"newXaxis"] [1] 0 0.430010601 11.23198508 25.00940297 37.75338045 45.98289639 [7] 48.92328133 52.51142822 61.12359751 63.85832121 70.98927949 77.16550181 [13] 97.73545713 113.6588007 118.6588007 129.9635717 151.8944844 178.7997437 [19] 206.45806 248.5916724 309.2463405 373.436891 441.0136089 508.6003268 [25] 586.8717683 670.5198381 760.8728108 854.0728565 948.6242311 1048.159042 [31] 1150.177895 1257.016622 1262.016622 1273.775731 1295.941555 1331.142905 [37] 1368.605796 1419.096727 1478.299769 1557.275945 1636.262122 1641.262122 [43] 1642.586431 44 Levels: 0 0.430010601 10030.11259 10096.32795 10167.4591 ... newXaxis I tried to convert this column to numeric using command: mydata[,"newXaxis"]<-as.numeric(mydata[,"newXaxis"]) However, it turned out a batch of integer numbers.
as.numeric(mydata[,"newXaxis"])
[1] 1 2 31 202 230 245 250 256 271 276 292 307 337 33 46 82 124 186 [19] 191 201 213 228 240 253 266 280 305 317 332 15 39 64 65 71 80 87 [37] 92 97 112 Does anyone know how to remove the factor and remain the actual numeric data? Thanks a lot! Phoebe [[alternative HTML version deleted]]
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