Ha David,
I do not know.
It must be that your AprtoDec object is different from month.abb.
Anyhow it should contain the labels for all twelve months!
If I copy your command in an interactive session I just get the message
that AprtoDec is not defined.
I understand that you type the commands interactively in an R session?
I usually prefer using an editor to write the program, and execute with a
> source("dotplot.R",echo=TRUE)
command.
I like an editor with syntax highlighting and shows matching brackets.
I have attached my dotplot.R to this mail.
Gerrit
Op 09-02-2021 om 21:14 schreef Parkhurst, David F.:
When I enter your line:
df <- expand.grid(site=c("een","twee","drie","vier","vijf"),
month=factor(3:12,levels=1:12,
labels=month.abb, ordered=TRUE))
I get + signs in front of month and label, as expected, and it follows with <
When I convert that to use my own variable names to this:
df <- expand.grid(site=c("CrCr","NFSC","MFSC","SFSC","LMO","MCE","MUE","MLE"),
monames=factor(3:12, levels=1:12,
labels=AprToDec, ordered=TRUE))
I get + signs in front of monames and labels, again as expected, but then it
gives me another + sign. And if I try to add another ), it keeps giving me +
signs. What is happening here?
From: Gerrit Draisma <gdrai...@xs4all.nl>
Date: Tuesday, February 9, 2021 at 6:14 AM
To: Parkhurst, David F. <parkh...@indiana.edu>
Cc: r-help@r-project.org <r-help@r-project.org>
Subject: Re: [R] Need help using lattice
Ha David,
Thanks for your reply.
For your last question, you have to change month into an ordered factor
variable:
library(lattice)
df <- expand.grid(site=c("een","twee","drie","vier","vijf"),
month=factor(3:12,levels=1:12,
labels=month.abb, ordered=TRUE))
df$conc <- rnorm(dim(df)[1])
dotplot(month~conc|site,data=df)
HTH, Gerrit
Op 08-02-2021 om 21:04 schreef Parkhurst, David F.:
That worked nicely; thanks again. Here’s what I used for our data:
library(lattice)
df <-
expand.grid(site=c("CrCr","NFSC","MFSC","SFSC","LMO","MCE","MUE","MLE","MoCe"),months=1:9)
dotplot(months~conc | site, data=df)
The result is attached. Is there a way to replace the month numbers on
the y axes with the names Apr-Dec?
David
library(lattice)
# month is defined as a factor with 12 levels, of which only levels 4 to 12
# are present in the data.
# Note that month.abb is a predefined constant in R.
# Here it provides the labels for all 12 levels.
df <- expand.grid(site=c("CrCr","NFSC","MFSC","SFSC","LMO","MCE","MUE","MLE"),
month=factor(4:12,levels=1:12,
labels=month.abb, ordered=TRUE))
df$conc <- rnorm(dim(df)[1])
# introduce some missing values
i <- sample(1:dim(df)[1],6)
df$conc[i] <- NA
# so there some missing points in the plot
dotplot(month~conc|site,data=df)
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