Hello so, here you have the output of the data frame. The data frame comes from a csv file. I could take Gr_2 instead of arcilla, because it is the same value... but curiously, it is a factor as well. > str(caperf) 'data.frame': 556 obs. of 38 variables: $ Hoja : int 818 818 818 818 818 818 818 818 818 818 ... $ idmuestra : Factor w/ 555 levels "1015-I","1015-II",..: 26 27 28 29 31 32 33 34 30 35 ... $ Año : int 1994 1994 1994 1994 1994 1994 1994 1994 1994 1994 ... $ x : int 655500 633050 632200 635000 637150 643700 655300 648000 653400 646200 ... $ y : int 4285800 4283050 4298150 4290000 4294800 4288850 4282700 4290350 4298450 4296650 ... $ CO_gkg1 : num 3.7 6.5 6.3 2.6 12.1 6.9 3.5 10.8 10.3 3.3 ... $ NTgkg_1 : num 0.53 1.01 0.66 0.42 1.3 0.82 0.43 1.31 0.85 0.51 ... $ C_Nratio : num 6.98 6.46 9.55 6.18 9.33 ... $ C03Ca : num 53.6 38 1.2 1.1 21.1 ... $ pHw : num 8 8.4 8.3 8.4 8.45 8.2 8.4 8.4 8.1 8.4 ... $ pHClK : num 7.5 7.4 7.2 7.4 8.3 7.5 7.8 7.4 7.4 7.5 ... $ CCC : num 9.7 14.4 10.5 7.2 12.8 ... $ CEdSm : num 0.62 0.72 0.38 0.36 19.35 ... $ pF1_3atm : num 25.4 21.3 9.1 12.8 24.1 ... $ pF15atm : num 15.3 10.6 5.8 6.1 8.45 11 3.7 18.8 10 14.3 ... $ Gr_2 : Factor w/ 391 levels "0","0.71","0.9",..: 200 31 158 36 142 60 377 263 140 151 ... $ Gr2_20 : num 19.1 39.1 2.9 5.2 NA 12.5 5.7 29.5 17.3 10.5 ... $ Gr20_50 : num 17.6 9.8 4.7 4 NA 10.4 4.2 13.3 12.5 7.8 ... $ Gr50_100 : num 14.1 12.2 7.6 9 NA 9.1 6.1 8.5 9.1 18.9 ... $ Gr100_250 : num 13.4 17.1 28.7 46.2 NA 20.8 28.7 13.6 16.8 32.9 ... $ Gr250_500 : num 7.1 5.7 28.8 15.2 NA 24.7 23.4 3.8 11.4 6.9 ... $ Gr500_1000 : num 4 1.8 5 3.9 NA 4.2 14.3 0.9 8.9 2.1 ... $ Gr1000_2000 : num 1.4 2 1.9 4 NA 4.1 8.9 0.4 4.8 0.9 ... $ arcilla : Factor w/ 391 levels "0","0.71","0.9",..: 201 32 158 37 NA 61 377 263 141 151 ... $ limo : num 36.7 48.9 7.6 9.2 0 22.9 9.9 42.8 29.8 18.3 ... $ arena : num 40 38.8 72 78.3 0 62.9 81.4 27.2 51 61.7 ... $ SUMA : Factor w/ 15 levels "0","100","100.2",..: 2 2 2 2 1 2 2 2 2 2 ... $ codusosuelo : logi NA NA NA NA NA NA ... $ pendiente : Factor w/ 9 levels "0","1","2","3",..: 3 2 3 3 2 4 3 2 2 3 ... $ profutil : logi NA NA NA NA NA NA ... $ profutil.1 : int 50 110 120 40 80 52 30 120 37 80 ... $ pedregosidad: int 0 0 0 2 0 4 4 0 3 3 ... $ Drenaje : int 4 4 4 4 1 4 5 3 4 4 ... $ codsuelo : num 1.1 2.1 3.1 2.1 12.3 2.5 2.5 4.1 2.5 2.1 ... $ textura : logi NA NA NA NA NA NA ... $ m.original : Factor w/ 7 levels "Calizas . dolomías y areniscas",..: 4 7 7 2 2 7 7 7 7 7 ... $ GRUPOPPAL : Factor w/ 13 levels "Arenosoles","Calcisoles",..: 11 2 3 2 12 2 2 4 2 2 ... $ SUELO : Factor w/ 40 levels "Arenosol calcárico",..: 30 3 8 3 36 7 7 10 7 3 ...
In the other side, the variable Drenaje (drainage) that is factor mode, appears as integer. Thanks a lot! Arantzazu Blanco Bernardeau Dpto de Química Agrícola, Geología y Edafología Universidad de Murcia-Campus de Espinardo ---------------------------------------- > Date: Tue, 18 May 2010 17:49:54 +0200 > From: ivan.calan...@uni-hamburg.de > To: > Subject: Re: [R] "Re: Change class factor to numeric" > > Hi, > > I think that providing the output from str(data array or whatever you > have) would help. > Because, for now, we don't have much idea of what you really have. > Moreover, some sample data is always welcomed (using the function dput > for example) > > Ivan > > > Le 5/18/2010 17:36, Arantzazu Blanco Bernardeau a écrit : >> >> sorry I had a mistake sending my question without a subject. I do resend >> again. Please excuse me. >> >>> Hello >>> I have a data array with soil variables (caperf), in which the variable >>> "clay" is factor (as I see entering str(caperf)) . I need to do a >>> regression model, so I need to have arcilla (=clay) as a numeric variable. >>> For that I have entered >>> >>> as.numeric(as.character(arcilla)) >>> >>> and even entering >>> 'as.numeric(levels(arcilla))[arcilla]'the variable is resting as factor, >>> and the linear model is not valid (for my purposes). >>> The decimal commas have been converted to decimal points, so I have no idea >>> of what to do. >>> Thanks a lot >>> >>> >>> Arantzazu Blanco Bernardeau >>> Dpto de Química Agrícola, Geología y Edafología >>> Universidad de Murcia-Campus de Espinardo >>> >>> >>> >>> >>> >>> >>> _________________________________________________________________ >>> Diseñar aplicaciones tiene premio. ¡Si eres desarrollador no esperes más! >>> http://www.imaginemobile.es >>> >> >> _________________________________________________________________ >> Recibe en tu HOTMAIL los emails de TODAS tus CUENTAS. + info >> >> ______________________________________________ >> 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. >> >> > > -- > Ivan CALANDRA > PhD Student > University of Hamburg > Biozentrum Grindel und Zoologisches Museum > Abt. Säugetiere > Martin-Luther-King-Platz 3 > D-20146 Hamburg, GERMANY > +49(0)40 42838 6231 > ivan.calan...@uni-hamburg.de > > ********** > http://www.for771.uni-bonn.de > http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php > > ______________________________________________ > 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.
