I would suggest that unlist(lapply(... should always be preferable to sapply(lapply... if you want to convert data in a data frame to a vector. I can't see any reason to run the same loop twice. But check timings -- maybe I'm overly sensitive to unimportant aesthetics.
Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." H. Gilbert Welch On Wed, Apr 9, 2014 at 12:21 AM, arun <smartpink...@yahoo.com> wrote: > Hi, > Try: > min(sapply(lapply(a,as.character),as.numeric)) > #[1] 2.2194 > > > A.K. > > On Wednesday, April 9, 2014 2:27 AM, Sachinthaka Abeywardana > <sachin.abeyward...@gmail.com> wrote: > > a is ofcourse a subset of data.frame, a ROW of the original table > specifically. > >> str(a) > 'data.frame': 1 obs. of 4 variables: > $ GHP: Factor w/ 51 levels "0.0944","0.1446",..: 33 > $ GP : Factor w/ 51 levels "0.1755","0.3582",..: 29 > $ T : num 2.9 > $ Tn : num 3.3 >> dput(a) > structure(list(GHP = structure(33L, .Label = c("0.0944", "0.1446", > "0.2", "0.4124", "0.7601", "0.871", "0.8849", "0.9176", "1.0168", > "1.0663", "1.0947", "1.1823", "1.1831", "1.2418", "1.2542", "1.3082", > "1.3283", "1.3758", "1.4437", "1.4621", "1.5769", "1.6699", "1.7306", > "1.8366", "1.8456", "1.8651", "1.8972", "1.9595", "2.0781", "2.0802", > "2.1553", "2.2097", "2.2194", "2.3669", "2.3935", "2.5351", "2.5374", > "2.5966", "2.6934", "2.7764", "2.9073", "6.003", "6.0825", "6.1013", > "6.1068", "6.1675", "6.2401", "6.6001", "6.6047", "7.8665", "+AC0-27.0565" > ), class = "factor"), GP = structure(29L, .Label = c("0.1755", > "0.3582", "0.4155", "0.4208", "0.7388", "0.8394", "0.8853", "0.9254", > "0.9423", "0.9695", "0.9757", "0.9793", "0.9896", "1.0422", "1.0519", > "1.116", "1.2482", "1.2691", "1.2735", "1.2788", "1.2948", "1.3141", > "1.3204", "1.4006", "1.5333", "1.6157", "1.9003", "2.6024", "2.6561", > "2.7466", "2.7572", "2.8108", "2.8256", "2.9565", "2.978", "3.0665", > "3.1155", "3.2027", "3.2123", "3.257", "3.4055", "6.0616", "6.0671", > "6.1166", "6.2053", "6.592", "6.6734", "7.005", "7.3159", "8.5777", > "+AC0-20.3347"), class = "factor"), T = 2.9007, Tn = 3.2988), .Names = > c("GHP", > "GP", "T", "Tn"), row.names = 28L, class = "data.frame") > > > On Wed, Apr 9, 2014 at 4:17 PM, Frede Aakmann Tøgersen <fr...@vestas.com> > wrote: >> We can't say because we don't know how a was created. >> >> Please email the output from >> >> str(a) >> >> and >> >> dput(a) >> >> >> >> Yours sincerely / Med venlig hilsen >> >> >> Frede Aakmann Tøgersen >> Specialist, M.Sc., Ph.D. >> Plant Performance & Modeling >> >> Technology & Service Solutions >> T +45 9730 5135 >> M +45 2547 6050 >> fr...@vestas.com >> http://www.vestas.com >> >> Company reg. name: Vestas Wind Systems A/S >> This e-mail is subject to our e-mail disclaimer statement. >> Please refer to www.vestas.com/legal/notice >> If you have received this e-mail in error please contact the sender. >> >> >>> -----Original Message----- >>> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] >>> On Behalf Of Sachinthaka Abeywardana >>> Sent: 9. april 2014 08:11 >>> To: r-help@r-project.org >>> Subject: [R] Not able to convert data.frame to numeric properly >>> >>> I have the following: >>> >>> >>> >a #note that the 28 is a row.name >>> >>> GHP GP T Tn >>> 28 2.2194 2.6561 2.9007 3.2988 >>> >>> >min(as.numeric(a)) >>> 2.9007 >>> >min(as.numeric(as.character(a))) >>> 2.9007 >>> >as.numeric(as.character(a)) #What's going on here??? >>> [1] 33.0000 29.0000 2.9007 3.2988 >>> >>> So basically how do I get this to show the correct value of 2.21 as my >>> minimum value? >>> >>> Thanks, >>> Sachin >>> >>> ______________________________________________ >>> 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. > > ______________________________________________ > 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.