[R] Choosing subset of data.frame
Dear R Forum I have a data frame as beta_results = data.frame(instrument = c(ABC, DEF, JKL, LMN, PQR, STU, UVW, XYZ), beta_values = c(1.27, -0.22, 0.529, 0.011, 2.31, -1.08, -2.7, 0.42)) beta_results instrument beta_values 1 ABC 1.270 2 DEF -0.220 3 JKL 0.529 4 LMN 0.011 5 PQR 2.310 6 STU -1.080 7 UVW -2.700 8 XYZ 0.420 Through some other process, I am getting instrument names as say (which may change each time I run this process and hence I can't hard code it). instru = c(JKL, STU, XYZ) Now I want the subset of beta_results, (say beta_results_A) pertaining to only instru i.e beta_results_A = instrument beta_values 3 JKL 0.529 6 STU -1.080 8 XYZ 0.420 I did try beta_results_A = beta_results[instru] or beta_results_A = subset(beta_results, beta_results$instrument = instru] but I guess it's failing. Kindly guide Regards Katherine [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Choosing subset of data.frame
Hi. Try this: beta_results[beta_results$instrument%in%instru, ] and see help page ?%in% Hope this helps Andrija On Thu, Jun 20, 2013 at 12:45 PM, Katherine Gobin katherine_go...@yahoo.com wrote: Dear R Forum I have a data frame as beta_results = data.frame(instrument = c(ABC, DEF, JKL, LMN, PQR, STU, UVW, XYZ), beta_values = c(1.27, -0.22, 0.529, 0.011, 2.31, -1.08, -2.7, 0.42)) beta_results instrument beta_values 1ABC 1.270 2DEF -0.220 3JKL 0.529 4LMN 0.011 5PQR 2.310 6STU -1.080 7UVW -2.700 8XYZ 0.420 Through some other process, I am getting instrument names as say (which may change each time I run this process and hence I can't hard code it). instru = c(JKL, STU, XYZ) Now I want the subset of beta_results, (say beta_results_A) pertaining to only instru i.e beta_results_A = instrument beta_values 3JKL 0.529 6STU -1.080 8XYZ 0.420 I did try beta_results_A = beta_results[instru] or beta_results_A = subset(beta_results, beta_results$instrument = instru] but I guess it's failing. Kindly guide Regards Katherine [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Choosing subset of data.frame
HI, You could also use: beta_results[!is.na(match(beta_results[,1],instru)),] # instrument beta_values #3 JKL 0.529 #6 STU -1.080 #8 XYZ 0.420 #If there are no duplicates, this could also work beta_results[match(instru,beta_results[,1]),] # instrument beta_values #3 JKL 0.529 #6 STU -1.080 #8 XYZ 0.420 A.K. - Original Message - From: Katherine Gobin katherine_go...@yahoo.com To: r-help@r-project.org r-help@r-project.org Cc: Sent: Thursday, June 20, 2013 6:45 AM Subject: [R] Choosing subset of data.frame Dear R Forum I have a data frame as beta_results = data.frame(instrument = c(ABC, DEF, JKL, LMN, PQR, STU, UVW, XYZ), beta_values = c(1.27, -0.22, 0.529, 0.011, 2.31, -1.08, -2.7, 0.42)) beta_results instrument beta_values 1 ABC 1.270 2 DEF -0.220 3 JKL 0.529 4 LMN 0.011 5 PQR 2.310 6 STU -1.080 7 UVW -2.700 8 XYZ 0.420 Through some other process, I am getting instrument names as say (which may change each time I run this process and hence I can't hard code it). instru = c(JKL, STU, XYZ) Now I want the subset of beta_results, (say beta_results_A) pertaining to only instru i.e beta_results_A = instrument beta_values 3 JKL 0.529 6 STU -1.080 8 XYZ 0.420 I did try beta_results_A = beta_results[instru] or beta_results_A = subset(beta_results, beta_results$instrument = instru] but I guess it's failing. Kindly guide Regards Katherine [[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.
