Creating Graphs in R Graphing techniques Sharon style! (I am not sure if this is a good or bad thing...
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Transcript of Creating Graphs in R Graphing techniques Sharon style! (I am not sure if this is a good or bad thing...
Creating Graphs in R
Graphing techniques Sharon style!(I am not sure if this is a good or bad thing but this is what I do...)
Basic graphical tools that I use...
lines(x, y, lty = “solid”, lwd = 1)
points(x , y, pch = 16, cex = 1)
arrows(x0, y0, x1, y1, length, angle, code)
text(x, y, labels, adj)
mtext(text, side, line)
axis(side, at, labels)
lines() This function is used to add lines to existing
graphs. The different line types are:
points() This function is used to add points to existing graphs.
Some of the different points are:
arrows()
code= argument specifies which ends of the arrows have an arrow head. code=1 produces a head at
the start of arrow, code=2 produces a head at
the end of the arrow code=3 produces a head at
both ends.2 4 6 8 10
02
46
810
Index
c(0:10)
text() text() draws the strings (text) given in the
vector labels at the coordinates given by x and y
Can be added to any part of the graph
mtext()
Text is written in one of the four margins of the current figure region or one of the outer margins of the device region.
Elements of the graph lines
points
arrows
text
mtext
axis
axis() This function give you control over the axis
labels. I use this to add the labels etc that I want on
the graph rather than using the default labels etc.
adj
The graph that provided the inspiration
The most important thing... Plan the process. Prepare your data. Work through getting one step correct before
moving to the next step. Don’t get overwhelmed by trying to do
everything at once. If you don’t succeed – try, try, try, try... again!
Useful links... http://users.monash.edu.au/~murray/AIMS-R-
users/ws/ws11.html
https://www.stat.auckland.ac.nz/~ihaka/120/Notes/ch03.pdf
www.zoologi.su.se/education/courseweb/statistics/Pimp_Your_Graph.pdf