Re: [R] How to import time-series data
Gabor Grothendieck wrote Try this xyplot.zoo lattice graph. Time series are represented in columns so we transpose the data and convert it to zoo. The screen= argument available in xyplot.zoo groups series into panels: Lines - plant,aphid,1,2,3,4 pumpkin,1-2,0.065566,0.057844,0.08,0.086879 pumpkin,1-3,0.107612,0.097272,0.11663,0.160499 squash,1-4,0.126939,0.115003,0.140275,0.188829 library(zoo) library(lattice) DF - read.csv(text = Lines) z - zoo(t(DF[3:6])) colnames(z) - DF$aphid xyplot(z, screen = DF$plant) Thank you! That gets the data in exactly the shape I was expecting. I was hoping to get the graph showing all lines on one plot, but coloured according to plant. I tried to change screen=DF$plant for groups=DF$plant, but it doesn't work, and I can't figure out from the documentation why it doesn't work (I think I need to more thoroughly understand data types first). Could you point me in the right direction? Thanks so much for your help so far. -- View this message in context: http://r.789695.n4.nabble.com/How-to-import-time-series-data-tp4381372p4383740.html Sent from the R help mailing list archive at Nabble.com. __ 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] How to import time-series data
On Mon, Feb 13, 2012 at 8:23 AM, RichardSmith richardsmith...@gmail.com wrote: Gabor Grothendieck wrote Try this xyplot.zoo lattice graph. Time series are represented in columns so we transpose the data and convert it to zoo. The screen= argument available in xyplot.zoo groups series into panels: Lines - plant,aphid,1,2,3,4 pumpkin,1-2,0.065566,0.057844,0.08,0.086879 pumpkin,1-3,0.107612,0.097272,0.11663,0.160499 squash,1-4,0.126939,0.115003,0.140275,0.188829 library(zoo) library(lattice) DF - read.csv(text = Lines) z - zoo(t(DF[3:6])) colnames(z) - DF$aphid xyplot(z, screen = DF$plant) Thank you! That gets the data in exactly the shape I was expecting. I was hoping to get the graph showing all lines on one plot, but coloured according to plant. I tried to change screen=DF$plant for groups=DF$plant, but it doesn't work, and I can't figure out from the documentation why it doesn't work (I think I need to more thoroughly understand data types first). Could you point me in the right direction? 1. Try this which uses lattice zoo graphics: xyplot(z, screen = 1, col = DF$plant) or with a legend: key - list(space = top, text = levels(DF$plant), points = FALSE, lines = TRUE, col = 1:nlevels(DF$plant)) xyplot(z, screen = 1, col = DF$plant, auto.key = key) 2. or using classic zoo graphics plot(z, screen = 1, col = DF$plant) To add a legend: legend(topleft, legend = levels(DF$plant), col = 1:nlevels(DF$plant), lty = 1) -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ 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] How to import time-series data
Sorry for this very basic question. I have time-series data, laid out as a table (in csv) like this: That is, the first column is the sample ID, and subsequent columns are the data at time interval in days since the start. In Excel, this is a very normal way to lay out time-series data, but I can't find any way to work with it in R. I want to import the data to R so I can, for example, plot the data for each sample. If I import as a matrix or table, R renames the day numbers to e.g. X20 instead of 20. What is the correct way to do this? Many thanks, Richard -- View this message in context: http://r.789695.n4.nabble.com/How-to-import-time-series-data-tp4381372p4381372.html Sent from the R help mailing list archive at Nabble.com. __ 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] How to import time-series data
On Sun, Feb 12, 2012 at 10:52 AM, RichardSmith richardsmith...@gmail.com wrote: Sorry for this very basic question. I have time-series data, laid out as a table (in csv) like this: That is, the first column is the sample ID, and subsequent columns are the data at time interval in days since the start. In Excel, this is a very normal way to lay out time-series data, but I can't find any way to work with it in R. I want to import the data to R so I can, for example, plot the data for each sample. If I import as a matrix or table, R renames the day numbers to e.g. X20 instead of 20. What is the correct way to do this? Many thanks, Richard Something seems to have gone wrong in the posting since we can't see the sample data that seems to be intended to be part of the post. At any rate read.zoo in the zoo package can read series. You may need to use the split= argument if your file defines multiple series tagged by an id column. See ?read.zoo and the Reading Data in Zoo vignette which is online here http://cran.r-project.org/web/packages/zoo/index.html and is an entire document devoted to reading time series. Alternately its available in R through the vignette(zoo-read) command. -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ 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] How to import time-series data
Gabor Grothendieck wrote Something seems to have gone wrong in the posting since we can't see the sample data that seems to be intended to be part of the post. Sorry, I posted via Nabble using the 'raw' command, which got stripped out it seems. Here's a small sample of the data... plant,aphid,1,2,3,4 pumpkin,1-2,0.065566,0.057844,0.08,0.086879 pumpkin,1-3,0.107612,0.097272,0.11663,0.160499 squash,1-4,0.126939,0.115003,0.140275,0.188829 columns named 1,2,3,4 etc. correspond to the weight of an aphid after that many days on that plant. I want to be able to plot the growth of all aphids on one plot, grouped by plant. Gabor Grothendieck wrote At any rate read.zoo in the zoo package can read series. You may need to use the split= argument if your file defines multiple series tagged by an id column. See ?read.zoo and the Reading Data in Zoo vignette which is online here http://cran.r-project.org/web/packages/zoo/index.html and is an entire document devoted to reading time series. Alternately its available in R through the vignette(zoo-read) command. Thanks for the link. I can't see any example in the zoo.read vignette which looks similar. Do I need to transpose my data first, so dates are in one column? If I do that, how do I keep the plant grouping associated with each aphid? Many thanks -- View this message in context: http://r.789695.n4.nabble.com/How-to-import-time-series-data-tp4381372p4381558.html Sent from the R help mailing list archive at Nabble.com. __ 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] How to import time-series data
On Sun, Feb 12, 2012 at 12:35 PM, RichardSmith richardsmith...@gmail.com wrote: Gabor Grothendieck wrote Something seems to have gone wrong in the posting since we can't see the sample data that seems to be intended to be part of the post. Sorry, I posted via Nabble using the 'raw' command, which got stripped out it seems. Here's a small sample of the data... plant,aphid,1,2,3,4 pumpkin,1-2,0.065566,0.057844,0.08,0.086879 pumpkin,1-3,0.107612,0.097272,0.11663,0.160499 squash,1-4,0.126939,0.115003,0.140275,0.188829 columns named 1,2,3,4 etc. correspond to the weight of an aphid after that many days on that plant. I want to be able to plot the growth of all aphids on one plot, grouped by plant. Try this xyplot.zoo lattice graph. Time series are represented in columns so we transpose the data and convert it to zoo. The screen= argument available in xyplot.zoo groups series into panels: Lines - plant,aphid,1,2,3,4 pumpkin,1-2,0.065566,0.057844,0.08,0.086879 pumpkin,1-3,0.107612,0.097272,0.11663,0.160499 squash,1-4,0.126939,0.115003,0.140275,0.188829 library(zoo) library(lattice) DF - read.csv(text = Lines) z - zoo(t(DF[3:6])) colnames(z) - DF$aphid xyplot(z, screen = DF$plant) -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ 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.
