The expression 19:15:21:22 evaluates as follows:
19:15:21:22
[1] 19 20 21 22
Warning messages:
1: In 19:15:21 : numerical expression has 5 elements: only the first used
2: In 19:15:21:22 :
The expression 2:2:2:2 evaluates as follows:
2:2:2:2
[1] 2
I'm *guessing* you mean
c(19,15,21,22)
[1] 19 15 21 22
and
c(2,2,2,2)
[1] 2 2 2 2
or
rep(2,4)
[1] 2 2 2 2
I would ignore any other advice you got from the source that
advised you to use expressions like 19:15:21:22 in R.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Mon, 27 Sep 2010, beloitstudent wrote:
Hello forum!
I am currently having trouble getting R to recognize one of my pch
characters. Here's what I have:
legend(120, 40, c("SAL-arterial", "SAL-portal", "GLP-1-arterial",
"GLP-1-portal"), bty="n", col=c("black"), pch=19:15:21:22, pt.bg="white",
pt.cex=2:2:2:2, lty=1, lwd=2, text.col="black", cex=1.3)
Now, SAL-arterial and SAL-portal should be a black circle and square,
respectively. GLP-1-arterial and GLP-1 portal should be a white circle and
square respectively.
The error message I am getting is
"Warning messages:
1: In 19:15:21 : numerical expression has 5 elements: only the first used
2: In 19:15:21:22 :
numerical expression has 3 elements: only the first used"
The SAL-arterial, GLP-1-arterial, and GLP-1-portal all are correct, however,
SAL-portal is not recognized and a small, black circle is placed there
instead of the black square that it should be.
How do I get the legend to match my data? Thanks in advance for your help!
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and provide commented, minimal, self-contained, reproducible code.
