Re: [R] 2013-06-28 coverts to 15884?
On 03/20/2014 08:46 AM, Jason Rupert wrote: MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 rbind(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [,1] [1,] 15884 c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 c(MaxUpdated_row, MaxUpdated_val) [1] 15884 Evidently, I'm again missing something simple, as I would prefer to be able to see the actual date to be shown. I found a work around, but I don't like it, as I have to convert back to date later: c(MaxUpdated_row, as.character(MaxUpdated_val)) Hi Jason, You aren't converting the date to something else, just displaying it as a character vector by using the format function. Whenever you form a vector, R tries to convert everything in it to the same data type. If you _assign_ that vector to something else: mymax-c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) you will have the date type in the MaxUpdated_val and the character type in mymax. Jim __ 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] 2013-06-28 coverts to 15884?
Not sure I follow. I would like the date formatting information preserved as is implemented when using as.character: MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 c(MaxUpdated_row, as.character(MaxUpdated_val)) [1] 2013-06-28 However, when I try to used as.Date(...) I loose the date formatting information: c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 I thought as.Date was an instruction describing how the data element should be represented? Maybe as.character is the only way to preserve the date formatting information in character string format in a vector and then just convert it back later on... Thanks again. On Wednesday, March 19, 2014 5:42 PM, Jim Lemon j...@bitwrit.com.au wrote: On 03/20/2014 08:46 AM, Jason Rupert wrote: MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 rbind(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [,1] [1,] 15884 c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 c(MaxUpdated_row, MaxUpdated_val) [1] 15884 Evidently, I'm again missing something simple, as I would prefer to be able to see the actual date to be shown. I found a work around, but I don't like it, as I have to convert back to date later: c(MaxUpdated_row, as.character(MaxUpdated_val)) Hi Jason, You aren't converting the date to something else, just displaying it as a character vector by using the format function. Whenever you form a vector, R tries to convert everything in it to the same data type. If you _assign_ that vector to something else: mymax-c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) you will have the date type in the MaxUpdated_val and the character type in mymax. Jim [[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] 2013-06-28 coverts to 15884?
Instead of making your initial value of MaxUpdated_row NULL, make it a 0-long Date object. Then c() will work as you wish (but not rbind). E.g., MaxUpdated_row - as.Date(character(0)) MaxUpdated_row - c(MaxUpdated_row, as.Date(2013-06-28, %Y-%m-%d)) MaxUpdated_row - c(MaxUpdated_row, as.Date(2013-07-06, %Y-%m-%d)) str(MaxUpdated_row) Date[1:2], format: 2013-06-28 2013-07-06 Bill Dunlap TIBCO Software wdunlap tibco.com -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Jason Rupert Sent: Wednesday, March 19, 2014 2:47 PM To: R-help@r-project.org Subject: [R] 2013-06-28 coverts to 15884? MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 rbind(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [,1] [1,] 15884 c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 c(MaxUpdated_row, MaxUpdated_val) [1] 15884 Evidently, I'm again missing something simple, as I would prefer to be able to see the actual date to be shown. I found a work around, but I don't like it, as I have to convert back to date later: c(MaxUpdated_row, as.character(MaxUpdated_val)) Any alternatives suggestions are much appreciated. [[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] 2013-06-28 coverts to 15884?
Hello, It works for me: R MaxUpdated_row - NULL R MaxUpdated_val - 2013-06-28 R R R rbind(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [,1] [1,] 15884 R c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 R c(MaxUpdated_row, MaxUpdated_val) [1] 2013-06-28 R Regards, Pascal On Thu, Mar 20, 2014 at 6:46 AM, Jason Rupert jasonkrup...@yahoo.com wrote: MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 rbind(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [,1] [1,] 15884 c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 c(MaxUpdated_row, MaxUpdated_val) [1] 15884 Evidently, I'm again missing something simple, as I would prefer to be able to see the actual date to be shown. I found a work around, but I don't like it, as I have to convert back to date later: c(MaxUpdated_row, as.character(MaxUpdated_val)) Any alternatives suggestions are much appreciated. [[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. -- Pascal Oettli Project Scientist JAMSTEC Yokohama, Japan __ 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] 2013-06-28 coverts to 15884?
On 03/20/2014 09:57 AM, Jason Rupert wrote: Not sure I follow. I would like the date formatting information preserved as is implemented when using as.character: MaxUpdated_row-NULL MaxUpdated_val- 2013-06-28 c(MaxUpdated_row, as.character(MaxUpdated_val)) [1] 2013-06-28 However, when I try to used as.Date(...) I loose the date formatting information: c(MaxUpdated_row, as.Date(MaxUpdated_val, %Y-%m-%d)) [1] 15884 I thought as.Date was an instruction describing how the data element should be represented? Maybe as.character is the only way to preserve the date formatting information in character string format in a vector and then just convert it back later on... As I wrote before, all of the data types in a vector object in R must be the same. So when you catenate (c) two things that are different data types, R coerces them to the same type. Because you are just displaying the values in the vector you have created, it doesn't change the data type of MaxUpdated_val: MaxUpdated_val-as.Date(2013-06-28,%Y-%m-%d) # prints as a formatted date MaxUpdated_val [1] 2013-06-28 # make a vector with a numeric and MaxUpdated_val c(0,MaxUpdated_val) # R coerces the value to numeric and prints both [1] 0 15884 # now assign it to something mynewmax-c(0,MaxUpdated_val) # in mynewmax the value is numeric mynewmax [1] 0 15884 # but MaxUpdated_val is still a date type on its own MaxUpdated_val [1] 2013-06-28 Jim __ 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.
