Date: Mon, 11 Mar 2013 21:33:33 +0000
From: ruipbarra...@sapo.pt
To: eliza_bo...@hotmail.com
CC: r-help@r-project.org
Subject: Re: [R] plot pch
Hello,
Try the following.
dat <-
structure(list(x = c(52.5211966906669, 49.8818953734405, 45.176643179385,
52.2988909042952, 46.1007828702965, 53.4910266471472, 49.013651970548,
55.1218462810432, 56.922347550005, 50.7531277271902), y =
c(23.953008533893,
45.1590889001506, 62.5358474328017, 39.4861634272874, 49.3108455233261,
46.0010163238786, 46.5779093951996, 37.4552698003145, 46.4057156535496,
56.667549695452), z = c(1, 4, 1, 2, 1, 3, 4, 2, 1, 3), r = 1:10), .Names
= c("x",
"y", "z", "r"), row.names = c(NA, -10L), class = "data.frame")
ch <- c(2, 22, 5, 1, 4) # triangle, rectangle, rhombus, circle, cross.
plot(dat$x, dat$y, pch = ch[dat$z])
axis(4, at = dat$y, labels = seq_along(dat$y)[order(dat$y)])
Also, if you want to see the pch characters, run without worrying about
the warnings (in general a bad tip, not really important here)
plot(1, type = "n", xlim=c(0, 17), ylim=c(0, 17))
for(x in 1:16) for(y in 1:16)
points(x, y, pch = (x - 1)*16 + y)
They go first column with x = 1, from y = 1 to 16, etc.
Hope this helps,
Rui Barradas
Em 11-03-2013 17:43, eliza botto escreveu:
Dear xpeRts,
I would like to ask a question about plotting in R.
I have four columns in which first column contains x-coordinate and second column
contains y-coordinate of certain points, whereas the third column "z" contains
classification number of those points from 1 to 4, it should be noted that this column
doesn't quantify anything, but just classify the points. More precisely like the following
dput(v)
structure(list(x = c(52.5211966906669, 49.8818953734405, 45.176643179385,
52.2988909042952, 46.1007828702965, 53.4910266471472, 49.013651970548,
55.1218462810432, 56.922347550005, 50.7531277271902), y = c(23.953008533893,
45.1590889001506, 62.5358474328017, 39.4861634272874, 49.3108455233261,
46.0010163238786, 46.5779093951996, 37.4552698003145, 46.4057156535496,
56.667549695452), z = c(1, 4, 1, 2, 1, 3, 4, 2, 1, 3), r = 1:10), .Names =
c("x",
"y", "z", "r"), row.names = c(NA, -10L), class = "data.frame")
What i want to do is to locate, in the space of "x" and "y", each point (in classified
section) with different shape for each classified section range from 1 to 4, by command "pch".
There should also be a y-axis on the right end of x-axis (secondary axis), which carries
the the point number as in column "r". As there are ten points so that axis
should range to 10 for the presentation of each point number. More precisely, z=1 should
be located at a point where x=52.52120, y=23.95301 and r=1.
where,
x= x-axis
y=y-axis on the left end of x-axis
r=y-axis on the right end of x-axis (secondary axis)
For points belonging to classification 1 there should be a triangle
For points belonging to classification 2 there should be a rectangle
and so on...
in my orinigal data i have 5 classifications.
i hope i was clear, but in case i my wording is confusing, kindly let me know.
Elisa
[[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.
