[R] Creating a new column with the number of the observation
I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[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] Creating a new column with the number of the observation
Hi. Here is one approach: x - rep(c(A, B, C), c(3,1,2)) DF - data.frame(x, stringsAsFactors=FALSE) cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T)) Andrija On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.comwrote: I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Creating a new column with the number of the observation
Here is another approach: x - rep(c(A, B, C), c(3,1,2)) DF1 - data.frame(x) cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x) 1:length(x))) Note the difference between DF (in previous solution) and DF1 str(DF) str(DF1) Andrija On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic djandr...@gmail.comwrote: Hi. Here is one approach: x - rep(c(A, B, C), c(3,1,2)) DF - data.frame(x, stringsAsFactors=FALSE) cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T)) Andrija On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.comwrote: I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[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] Creating a new column with the number of the observation
Absolutely fantastic! Thank you for the TWO approachs. 2014-05-28 19:13 GMT-03:00 Andrija Djurovic djandr...@gmail.com: Here is another approach: x - rep(c(A, B, C), c(3,1,2)) DF1 - data.frame(x) cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x) 1:length(x))) Note the difference between DF (in previous solution) and DF1 str(DF) str(DF1) Andrija On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic djandr...@gmail.comwrote: Hi. Here is one approach: x - rep(c(A, B, C), c(3,1,2)) DF - data.frame(x, stringsAsFactors=FALSE) cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T)) Andrija On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.comwrote: I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Marcos Martins Santos mmsantos...@gmail.com -- Tel. (85) 3044-7436 Cel. (85) 9636-6612 -- Skype: marcosmartinssantos [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Creating a new column with the number of the observation
Hi, If it ordered by the variable x, you could also try: within(DF1, new_c-sequence(table(x))) A.K. On Wednesday, May 28, 2014 6:14 PM, Andrija Djurovic djandr...@gmail.com wrote: Here is another approach: x - rep(c(A, B, C), c(3,1,2)) DF1 - data.frame(x) cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x) 1:length(x))) Note the difference between DF (in previous solution) and DF1 str(DF) str(DF1) Andrija On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic djandr...@gmail.comwrote: Hi. Here is one approach: x - rep(c(A, B, C), c(3,1,2)) DF - data.frame(x, stringsAsFactors=FALSE) cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T)) Andrija On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.comwrote: I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[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. __ 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] Creating a new column with the number of the observation
Perfect! Thank you a lot! 2014-05-28 21:57 GMT-03:00 arun smartpink...@yahoo.com: Hi, If it ordered by the variable x, you could also try: within(DF1, new_c-sequence(table(x))) A.K. On Wednesday, May 28, 2014 6:14 PM, Andrija Djurovic djandr...@gmail.com wrote: Here is another approach: x - rep(c(A, B, C), c(3,1,2)) DF1 - data.frame(x) cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x) 1:length(x))) Note the difference between DF (in previous solution) and DF1 str(DF) str(DF1) Andrija On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic djandr...@gmail.com wrote: Hi. Here is one approach: x - rep(c(A, B, C), c(3,1,2)) DF - data.frame(x, stringsAsFactors=FALSE) cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T)) Andrija On Wed, May 28, 2014 at 10:46 PM, Marcos Santos mmsantos...@gmail.com wrote: I have a data frame like this: Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130 I need to create an index column that show the number of the observation for each category. I have three observations in the category A, one in category B, one in category C and two in category D. The new matrix should be like this: Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C 80 1 D 120 1 D 130 2 Please, could anyone help me with this problem? Thank you. -- Marcos Martins Santos mmsantos...@gmail.com -- Skype: marcosmartinssantos [[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. -- Marcos Martins Santos mmsantos...@gmail.com -- Tel. (85) 3044-7436 Cel. (85) 9636-6612 -- Skype: marcosmartinssantos [[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.
