Re: [R] Join points with arrows based a TIME variable
zhijie zhang wrote: Hi, I have a data set with three variables,X Y and Time. X and Y are the coordinates of points, i want to join these points according to the Time sequence using arrows? Demo Example data: x-c(1:6) y-c(1:6) time-c(6:1) data-cbind(x,y,time) data x y time [1,] 1 16 [2,] 2 25 [3,] 3 34 [4,] 4 43 [5,] 5 52 [6,] 6 61 I hope to join the six points with points' time=1 as starting point and points' time=6 as endpoint. So the sequence is time=1,2,3,4,5,6 and join the corresponding points with arrows. Any ideas on it? data - data.frame(data[order(data[,time]),]) with(data, plot(y ~ x)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) Uwe Ligges [[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] Join points with arrows based a TIME variable
Hi Uwe, It works. Why does the following argument generate different results? with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) #correct,multiple joins with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) #wrong,seems to be only one join From the ?arrows, the second argument should work. What is the problem? Thanks a lot. #codes: x-c(1:6);y-c(1:6);time-c(6:1);data-cbind(x,y,time);data data-data.frame(data[order(data[,time]),]) with(data, plot(x,y)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) with(data, plot(x,y)) with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) 2009/11/4 Uwe Ligges lig...@statistik.tu-dortmund.de zhijie zhang wrote: Hi, I have a data set with three variables,X Y and Time. X and Y are the coordinates of points, i want to join these points according to the Time sequence using arrows? Demo Example data: x-c(1:6) y-c(1:6) time-c(6:1) data-cbind(x,y,time) data x y time [1,] 1 16 [2,] 2 25 [3,] 3 34 [4,] 4 43 [5,] 5 52 [6,] 6 61 I hope to join the six points with points' time=1 as starting point and points' time=6 as endpoint. So the sequence is time=1,2,3,4,5,6 and join the corresponding points with arrows. Any ideas on it? data - data.frame(data[order(data[,time]),]) with(data, plot(y ~ x)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) Uwe Ligges [[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.htmlhttp://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] Join points with arrows based a TIME variable
zhijie zhang wrote: Hi Uwe, It works. Why does the following argument generate different results? with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) #correct,multiple joins In the former you select all elements of the vectors except the first or last one, respectively. In the next call you select just one arguemnt of each vector, namely the first or last one. Uwe Ligges with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) #wrong,seems to be only one join From the ?arrows, the second argument should work. What is the problem? Thanks a lot. #codes: x-c(1:6);y-c(1:6);time-c(6:1);data-cbind(x,y,time);data data-data.frame(data[order(data[,time]),]) with(data, plot(x,y)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) with(data, plot(x,y)) with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) 2009/11/4 Uwe Ligges lig...@statistik.tu-dortmund.de zhijie zhang wrote: Hi, I have a data set with three variables,X Y and Time. X and Y are the coordinates of points, i want to join these points according to the Time sequence using arrows? Demo Example data: x-c(1:6) y-c(1:6) time-c(6:1) data-cbind(x,y,time) data x y time [1,] 1 16 [2,] 2 25 [3,] 3 34 [4,] 4 43 [5,] 5 52 [6,] 6 61 I hope to join the six points with points' time=1 as starting point and points' time=6 as endpoint. So the sequence is time=1,2,3,4,5,6 and join the corresponding points with arrows. Any ideas on it? data - data.frame(data[order(data[,time]),]) with(data, plot(y ~ x)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) Uwe Ligges [[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.htmlhttp://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] Join points with arrows based a TIME variable
Hi Uwe, I mistook the arguments for the function of arrows. I understand now. Thanks again. 2009/11/5 Uwe Ligges lig...@statistik.tu-dortmund.de zhijie zhang wrote: Hi Uwe, It works. Why does the following argument generate different results? with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) #correct,multiple joins In the former you select all elements of the vectors except the first or last one, respectively. In the next call you select just one arguemnt of each vector, namely the first or last one. Uwe Ligges with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) #wrong,seems to be only one join From the ?arrows, the second argument should work. What is the problem? Thanks a lot. #codes: x-c(1:6);y-c(1:6);time-c(6:1);data-cbind(x,y,time);data data-data.frame(data[order(data[,time]),]) with(data, plot(x,y)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) with(data, plot(x,y)) with(data, arrows(x[1], y[1], x[length(x)], y[length(x)])) 2009/11/4 Uwe Ligges lig...@statistik.tu-dortmund.de zhijie zhang wrote: Hi, I have a data set with three variables,X Y and Time. X and Y are the coordinates of points, i want to join these points according to the Time sequence using arrows? Demo Example data: x-c(1:6) y-c(1:6) time-c(6:1) data-cbind(x,y,time) data x y time [1,] 1 16 [2,] 2 25 [3,] 3 34 [4,] 4 43 [5,] 5 52 [6,] 6 61 I hope to join the six points with points' time=1 as starting point and points' time=6 as endpoint. So the sequence is time=1,2,3,4,5,6 and join the corresponding points with arrows. Any ideas on it? data - data.frame(data[order(data[,time]),]) with(data, plot(y ~ x)) with(data, arrows(x[-length(x)], y[-length(x)], x[-1], y[-1])) Uwe Ligges [[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.htmlhttp://www.r-project.org/posting-guide.html 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] Join points with arrows based a TIME variable
Hi, I have a data set with three variables,X Y and Time. X and Y are the coordinates of points, i want to join these points according to the Time sequence using arrows? Demo Example data: x-c(1:6) y-c(1:6) time-c(6:1) data-cbind(x,y,time) data x y time [1,] 1 16 [2,] 2 25 [3,] 3 34 [4,] 4 43 [5,] 5 52 [6,] 6 61 I hope to join the six points with points' time=1 as starting point and points' time=6 as endpoint. So the sequence is time=1,2,3,4,5,6 and join the corresponding points with arrows. Any ideas on it? [[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.
