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| '''[[w:R programming language|R]]''' is both a programming language, and a software environment for statistical computing.
| | {{welcome and expand}} |
| | | [[Category:Programming]] |
| | | [[Category:Pages moved from Wikibooks]] |
| == Plotting data with R ==
| | [[Category:How to use R]] |
| This tutorial demonstrates how to plot data from files in R.
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| * Given the data file ''data.txt'' located at ''<path>'':
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| 1970 45 63
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| 1980 52 59
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| 1990 59 52
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| 2000 63 45
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| * This data can easilty be loaded into R using the following commands:
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| setwd("<path>") # change working directory
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| data = read.table("data.txt") # load data
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| * Plotting can then be performed as follows:
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| # Setup empty plot window
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| plot(0, type = "n", main = "Plot Title", xlab = "X axis", ylab = "Y axis", xlim = c(1970,2000), ylim = c(0,100))
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| grid() # add grid
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| lines(data[,1], data[,2], lty = 1) # draw first dataset
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| lines(data[,1], data[,3], lty = 2) # draw second dataset
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| legend("topright", c("first dataset", "second dataset"), lty = c(1, 2) )
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| * Export of the plot to pdf is easilty performed by adding ''pdf("filename.pdf")'' prior to the plotting, and ''dev.off()'' after the plotting.
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| {{stub}}
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