[R] plot(): I want to display dates on X-axis.
e.g. dat [,1]dat[,2] [1,]300 20060101 [2,]257 20060102 [3,]320 20060103 [4,]311 20060104 [5,]297 20060105 [6,]454 20060106 [7,]360 20060107 [8,]307 20060108 This looks like a matrix ... not a data frame. You defiantly want a data frame. So lets say you have: dat - matrix(c(round(rnorm(8)*100+400),20060101:20060108),ncol=2) #convert it: dat - as.data.frame(dat) #determine the dates: dat$date - as.Date(as.character(dat$V2),%Y%m%d) #plot it: plot(V1 ~ date, dat) __ R-help@stat.math.ethz.ch 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] plot(): I want to display dates on X-axis.
Hi you probably know that the second column are dates but your poor PC does not, so you should to tell him. You have several options: Change the column to suitable date format - see chron package or help pages related to date functions e.g. strptime, as.Date, ... and perform your plot. Change your dat column to character vector and using it as a labels to x axis - see help pages to plot, axes, titles On 5 Mar 2007 at 13:26, d. sarthi maheshwari wrote: Date sent: Mon, 5 Mar 2007 13:26:28 +0530 From: d. sarthi maheshwari [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Subject:[R] plot(): I want to display dates on X-axis. Hi, I want to display dates on my x-axis of the plot. I was trying to use plot() command for the same and passing the values in following manner: The variable dat is a data frame. The first column has numeric values and second column has date. e.g. dat [,1]dat[,2] [1,]300 20060101 [2,]257 20060102 [3,]320 20060103 [4,]311 20060104 [5,]297 20060105 [6,]454 20060106 [7,]360 20060107 [8,]307 20060108 However what did you suppose this command will do? Did you even try to read plot help page? the command I am performing is:: plot(x=dat[1], y=as.character(dat[2])) If you want to plot date on x axis and values on y axis why you did it in opposite way? plot(dat[,2], dat[,1]) after transformation to date format shall do what you want. Regards Petr Kindly suggest some method by which I can perform my task of displaying the first column values on y-axis against dates on x-axis. -- Thanks Regards Sarthi M. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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. Petr Pikal [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch 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] plot(): I want to display dates on X-axis.
Sarthi M. wrote: I want to display dates on my x-axis of the plot. Dates are a problem. There's a standard for dates, but it seems that most users and software didn't catch up :-/ The variable dat is a data frame. The first column has numeric values and second column has date. e.g. dat [,1]dat[,2] [1,]300 20060101 [2,]257 20060102 [3,]320 20060103 [4,]311 20060104 [5,]297 20060105 [6,]454 20060106 [7,]360 20060107 [8,]307 20060108 the command I am performing is:: plot(x=dat[1], y=as.character(dat[2])) Hmmm... When I needed something similar, I did this day: y - dat[,1] # because in a (xy) plot, x is the scale and y the data years - floor(dat[,2] / 1) months - floor(dat[,2] / 100) %% 100 days - dat[,2] %% 1 x - ISOdate(years, months, days) plot(x, y) Kindly suggest some method by which I can perform my task of displaying the first column values on y-axis against dates on x-axis. Of course, you can combine all that into one line, but readability will be blown up: plot(ISOdate(floor(dat[,2] / 1), floor(dat[,2] / 100) %% 100, dat[,2] %% 1), dat[,1]) Alberto Monteiro __ R-help@stat.math.ethz.ch 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] plot(): I want to display dates on X-axis.
You can also do it with the following: plot(as.POSIXct(strptime(as.character(dat[,2]), %Y%m%d)), dat[,1]) On 3/5/07, d. sarthi maheshwari [EMAIL PROTECTED] wrote: Hi, I want to display dates on my x-axis of the plot. I was trying to use plot() command for the same and passing the values in following manner: The variable dat is a data frame. The first column has numeric values and second column has date. e.g. dat [,1]dat[,2] [1,]300 20060101 [2,]257 20060102 [3,]320 20060103 [4,]311 20060104 [5,]297 20060105 [6,]454 20060106 [7,]360 20060107 [8,]307 20060108 the command I am performing is:: plot(x=dat[1], y=as.character(dat[2])) Kindly suggest some method by which I can perform my task of displaying the first column values on y-axis against dates on x-axis. -- Thanks Regards Sarthi M. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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] plot(): I want to display dates on X-axis.
Hi, I want to display dates on my x-axis of the plot. I was trying to use plot() command for the same and passing the values in following manner: The variable dat is a data frame. The first column has numeric values and second column has date. e.g. dat [,1]dat[,2] [1,]300 20060101 [2,]257 20060102 [3,]320 20060103 [4,]311 20060104 [5,]297 20060105 [6,]454 20060106 [7,]360 20060107 [8,]307 20060108 the command I am performing is:: plot(x=dat[1], y=as.character(dat[2])) Kindly suggest some method by which I can perform my task of displaying the first column values on y-axis against dates on x-axis. -- Thanks Regards Sarthi M. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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.
