Re: [R] strange behavior, adds new field by non-existent field
?'[' and the look for partial matching On Fri, Mar 19, 2010 at 3:38 PM, Peter Keller keller...@gmail.com wrote: data: tmp1 Date HrMn Temp Q.4 1 19450101 0900 -37.0 1 2 19450101 1000 -35.9 2 3 19450101 1100 -35.9 3 4 19450101 1200 -36.4 4 5 19450101 1300 -36.4 5 6 19450101 1400 -36.4 6 7 19450101 1500 -36.4 7 8 19450101 1600 -37.5 9 Accidentally, I did this (I meant to write Q.4 instead of Q here) tmp1$Q[tmp1$Q!=1 tmp1$Q!= 5]-NA I would have expected it to tank, but still got a new field with the the values I wanted tmp1 Date HrMn Temp Q.4Q 1 19450101 0900 -37.0 11 2 19450101 1000 -35.9 2 NA 3 19450101 1100 -35.9 3 NA 4 19450101 1200 -36.4 4 NA 5 19450101 1300 -36.4 55 6 19450101 1400 -36.4 6 NA 7 19450101 1500 -36.4 7 NA 8 19450101 1600 -37.5 9 NA Can someone explain this? Peter sessionInfo() R version 2.10.1 Patched (2010-03-16 r51294) i386-pc-mingw32 locale: [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lattice_0.18-3 fortunes_1.3-7 zoo_1.6-2 loaded via a namespace (and not attached): [1] grid_2.10.1 tools_2.10.1 -- View this message in context: http://n4.nabble.com/strange-behavior-adds-new-field-by-non-existent-field-tp1603563p1603563.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] strange behavior, adds new field by non-existent field
Hi Peter, I think you want tmp1$Q.4[tmp1$Q.4 != 1 tmp1$Q.4 != 5] - NA tmp1 #Date HrMn Temp Q.4 # 1 19450101 900 -37.0 1 # 2 19450101 1000 -35.9 NA # 3 19450101 1100 -35.9 NA # 4 19450101 1200 -36.4 NA # 5 19450101 1300 -36.4 5 # 6 19450101 1400 -36.4 NA # 7 19450101 1500 -36.4 NA # 8 19450101 1600 -37.5 NA (note the .4 after Q). HTH, Jorge On Fri, Mar 19, 2010 at 3:38 PM, Peter Keller wrote: data: tmp1 Date HrMn Temp Q.4 1 19450101 0900 -37.0 1 2 19450101 1000 -35.9 2 3 19450101 1100 -35.9 3 4 19450101 1200 -36.4 4 5 19450101 1300 -36.4 5 6 19450101 1400 -36.4 6 7 19450101 1500 -36.4 7 8 19450101 1600 -37.5 9 Accidentally, I did this (I meant to write Q.4 instead of Q here) tmp1$Q[tmp1$Q!=1 tmp1$Q!= 5]-NA I would have expected it to tank, but still got a new field with the the values I wanted tmp1 Date HrMn Temp Q.4Q 1 19450101 0900 -37.0 11 2 19450101 1000 -35.9 2 NA 3 19450101 1100 -35.9 3 NA 4 19450101 1200 -36.4 4 NA 5 19450101 1300 -36.4 55 6 19450101 1400 -36.4 6 NA 7 19450101 1500 -36.4 7 NA 8 19450101 1600 -37.5 9 NA Can someone explain this? Peter sessionInfo() R version 2.10.1 Patched (2010-03-16 r51294) i386-pc-mingw32 locale: [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lattice_0.18-3 fortunes_1.3-7 zoo_1.6-2 loaded via a namespace (and not attached): [1] grid_2.10.1 tools_2.10.1 -- View this message in context: http://n4.nabble.com/strange-behavior-adds-new-field-by-non-existent-field-tp1603563p1603563.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] strange behavior, adds new field by non-existent field
This is a property of lists. With the $ form of extraction names may be abbreviated to the minimum number of characters required to specify the component uniquely. This with your tmp1 tmp1$Q [1] 1 2 3 4 5 6 7 9 Levels: 1 2 3 4 5 6 7 9 tmp1$Q. [1] 1 2 3 4 5 6 7 9 Levels: 1 2 3 4 5 6 7 9 tmp1$Q.4 [1] 1 2 3 4 5 6 7 9 Levels: 1 2 3 4 5 6 7 9 If you were to do it another way, e.g. tmp1 - within(tmp1, is.na(Q.4[!(Q.4 %in% c(1,5))]) - TRUE) then you would need to use the full component name, Q.4. (This works too, by the way: tmp1 Date HrMn Temp Q.4 1 19450101 900 -37.01 2 19450101 1000 -35.9 NA 3 19450101 1100 -35.9 NA 4 19450101 1200 -36.4 NA 5 19450101 1300 -36.45 6 19450101 1400 -36.4 NA 7 19450101 1500 -36.4 NA 8 19450101 1600 -37.5 NA you may care to figure out how it does so, though!) On Fri, Mar 19, 2010 at 3:38 PM, Peter Keller wrote: data: tmp1 Date HrMn Temp Q.4 1 19450101 0900 -37.0 1 2 19450101 1000 -35.9 2 3 19450101 1100 -35.9 3 4 19450101 1200 -36.4 4 5 19450101 1300 -36.4 5 6 19450101 1400 -36.4 6 7 19450101 1500 -36.4 7 8 19450101 1600 -37.5 9 Accidentally, I did this (I meant to write Q.4 instead of Q here) tmp1$Q[tmp1$Q!=1 tmp1$Q!= 5]-NA I would have expected it to tank, but still got a new field with the the values I wanted tmp1 Date HrMn Temp Q.4Q 1 19450101 0900 -37.0 11 2 19450101 1000 -35.9 2 NA 3 19450101 1100 -35.9 3 NA 4 19450101 1200 -36.4 4 NA 5 19450101 1300 -36.4 55 6 19450101 1400 -36.4 6 NA 7 19450101 1500 -36.4 7 NA 8 19450101 1600 -37.5 9 NA Can someone explain this? Peter sessionInfo() R version 2.10.1 Patched (2010-03-16 r51294) i386-pc-mingw32 locale: [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] lattice_0.18-3 fortunes_1.3-7 zoo_1.6-2 loaded via a namespace (and not attached): [1] grid_2.10.1 tools_2.10.1 -- View this message in context: http://n4.nabble.com/strange-behavior-adds-new-field-by-non-existent-field-tp1603563p1603563.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
