Re: [R] replace NA value with 0
Hi r-help-boun...@r-project.org napsal dne 17.03.2010 18:01:50: Building on the question how to replace NA with 0. My data set below has date, station 1, flags for station 1, station 2, flags for station 2, etc... I would like to make the values in the station columns equal to 1 and the NA in the station columns equal to 0 and then sum each row for the number of 1 present in the row. head(data.matrix, n=10) date 05AE005 flg_05AE005 05AF010 flg_05AF010 05BM014 flg_05BM014 1 1900-01-01 NANA NANA NA NA 2 1900-01-02 NANA NANA .23 NA 3 1900-01-03 NANA NANA .45 NA 4 1900-01-04 NANA NANA NA NA 5 1900-01-05 NANA NANA NA NA 6 1900-01-06 NANA NANA NA NA 7 1900-01-07 0.75 NA .09NA NA NA 8 1900-01-08 0.87 NA .23NA NA NA 9 1900-01-09 0.26 NA .78NA NA NA 10 1900-01-10 0.23 NA NANA NA NA # figure out which columns the data are in colpos - seq(2, by = 2, length.out = n) What relation is colpos to data.matrix? # make value 1 and NA 0 colpos[!is.na(colpos)] - 1.0 colpos[is.na(colpos)] - 0.0 # sum number of values on a given day rowsum(colpos, ) Do you want by chance to get how many nonnumeric values are in each row of your data frame in station columns? If yes, try colpos - seq(2, 7, by = 2) rowSums(!is.na(data.matrix)[,colpos]) Regards Petr The above script is what i have tried - and does not work. The values are not being replaced with 1s and the NAs with 0s and the rows are not being summed. any help would be greatly appreciated. E -- View this message in context: http://n4.nabble.com/replace-NA-value-with-0- tp834446p1596779.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. __ 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] replace NA value with 0
Building on the question how to replace NA with 0. My data set below has date, station 1, flags for station 1, station 2, flags for station 2, etc... I would like to make the values in the station columns equal to 1 and the NA in the station columns equal to 0 and then sum each row for the number of 1 present in the row. head(data.matrix, n=10) date 05AE005 flg_05AE005 05AF010 flg_05AF010 05BM014 flg_05BM014 1 1900-01-01 NANA NANA NANA 2 1900-01-02 NANA NANA .23NA 3 1900-01-03 NANA NANA .45NA 4 1900-01-04 NANA NANA NANA 5 1900-01-05 NANA NANA NANA 6 1900-01-06 NANA NANA NANA 7 1900-01-07 0.75 NA .09NA NANA 8 1900-01-08 0.87 NA .23NA NANA 9 1900-01-09 0.26 NA .78NA NANA 10 1900-01-10 0.23 NA NANA NANA # figure out which columns the data are in colpos - seq(2, by = 2, length.out = n) # make value 1 and NA 0 colpos[!is.na(colpos)] - 1.0 colpos[is.na(colpos)] - 0.0 # sum number of values on a given day rowsum(colpos, ) The above script is what i have tried - and does not work. The values are not being replaced with 1s and the NAs with 0s and the rows are not being summed. any help would be greatly appreciated. E -- View this message in context: http://n4.nabble.com/replace-NA-value-with-0-tp834446p1596779.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.
[R] replace NA value with 0
Hi, how can I replace NA value with 0: 1991 217 119 103 109 137 202 283 240 146 NA 1992 270 174 149 144 166 239 278 237 275 NA 1993 146 111 104 89 98 131 153 148 175 NA 1994 177 123 146 124 121 200 266 191 240 106 1995 145 98 95 89 95 130 183 161 164 129 1996 145 98 89 90 93 138 158 131 161 161 1991 217 119 103 109 137 202 283 240 146 0 1992 270 174 149 144 166 239 278 237 275 0 1993 146 111 104 89 98 131 153 148 175 0 1994 177 123 146 124 121 200 266 191 240 106 1995 145 98 95 89 95 130 183 161 164 129 1996 145 98 89 90 93 138 158 131 161 161 Best wishes, Alfredo [[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] replace NA value with 0
x[ is.na(x) ] - 0 should work in most cases i think. Gabor On Fri, Sep 14, 2007 at 10:08:19AM +0200, Alfredo Alessandrini wrote: Hi, how can I replace NA value with 0: 1991 217 119 103 109 137 202 283 240 146 NA 1992 270 174 149 144 166 239 278 237 275 NA 1993 146 111 104 89 98 131 153 148 175 NA 1994 177 123 146 124 121 200 266 191 240 106 1995 145 98 95 89 95 130 183 161 164 129 1996 145 98 89 90 93 138 158 131 161 161 1991 217 119 103 109 137 202 283 240 146 0 1992 270 174 149 144 166 239 278 237 275 0 1993 146 111 104 89 98 131 153 148 175 0 1994 177 123 146 124 121 200 266 191 240 106 1995 145 98 95 89 95 130 183 161 164 129 1996 145 98 89 90 93 138 158 131 161 161 Best wishes, Alfredo [[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. -- Csardi Gabor [EMAIL PROTECTED]MTA RMKI, ELTE TTK __ 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] replace NA value with 0
On Fri, Sep 14, 2007 at 09:46:57AM +0100, S Ellison wrote:
Gabor Csardi [EMAIL PROTECTED] 14/09/2007 09:27:03
x[ is.na(x) ] - 0
should work in most cases i think.
... only you probably shouldn't be doing that at all. Words like 'bias'
spring to mind...
Woudn't it be better to accept the NA's and find methods that handle them as
genuinely missing. R is usually quite good at that.
Although in some cases the proper handling of NA values is to treat
them az zeros
I like this list because if you ask a question,
they don't only solve it immediately (in five different ways), but they
persuade you that what you're trying to do is actually
incorrect/stupid/uninteresting or your problem just makes no sense at all.
:)
Gabor
On Fri, Sep 14, 2007 at 10:08:19AM +0200, Alfredo Alessandrini wrote:
Hi,
how can I replace NA value with 0:
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Re: [R] replace NA value with 0
Ted Harding [EMAIL PROTECTED] 14/09/2007 10:59:47
On the contrary! It adds to our collective wisdom.
We all have to suck eggs, and usually can successfully perform the act.
Ted,
Thanks for the kind remarks.
But we'll have to get off the egg topic, or we'll all end up as acknowledged
expert suckers
Steve E
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Re: [R] replace NA value with 0
On 14-Sep-07 09:22:36, S Ellison wrote: Being a chemist, I have to confess that I can't always tell that what I'm about to attempt is barking, trivial, uninteresting or better done a completely different way; myself, I'd rather be warned too often than left to dig my own pit and fall into it ... On NA's vs zero, I usually have the reverse problem in my corner of the world; folk will often call nondetects 'missing', which is also often a silly thing to do; nondetect means 'I looked and it was too low to see' but NA means 'I didn't look'. All that leaves me a bit nervous about replacing NA with 0 and vice versa ... hence the knee-jerk. Apologies if I'm teaching egg-sucking to an expert. S On the contrary! It adds to our collective wisdom. We all have to suck eggs, and usually can successfully perform the act. But it is useful to learn about people's experiences of when it is wise to spit out the result. Thanks, and best wishes, Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 14-Sep-07 Time: 10:59:42 -- XFMail -- __ 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] replace NA value with 0
Seconded. --- Greg Snow [EMAIL PROTECTED] wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gabor Csardi Sent: Friday, September 14, 2007 2:56 AM To: S Ellison Cc: [EMAIL PROTECTED] Subject: Re: [R] replace NA value with 0 I nominate the following paragraph for the fortunes package I like this list because if you ask a question, they don't only solve it immediately (in five different ways), but they persuade you that what you're trying to do is actually incorrect/stupid/uninteresting or your problem just makes no sense at all. :) Gabor __ 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.
