On Jan 24, 2012, at 11:20 AM, Katarzyna Sawicka wrote:
Dear David,
Thanks for your reply. However, I can't see how this is a case. The
table is read into R from .csv file. The column Date has a factor
format then. If I don't change it to as.Date format and use the same
code, the 'text' function print the mean by the maximum on y ax
regardless to the column Date being chosen for x ax. But if the Date
stays as factor on the x ax function 'plot' returns boxplots (not
what I want), not single points for each value of A,B,C or D
(desired). The problem with 'text' starts when I change the column
'Date' format in order to get the points instead of boxplots. Any
idea how to solve that?
Sorry. I wasn't able to follow that problem statement. Let me ask a
counter question: Are you aware that the x-values in your plot calls
are being converted to the numeric values for the dates?
> as.numeric(Sys.Date())
[1] 15363
So... I (still) think your x-values for 'text' are not matching your x-
values for 'plot' AND you are not supplying your y-values for 'text'
in a sensible manner.
> plot(Sys.Date(), 1)
> text(x=15363, labels="here is today") # nothing plotted
> text(x=15363, y=0.8, labels="here is today") # plotted as expected
Cheers,
Kasia
-----Original Message-----
From: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: 24 January 2012 15:22
To: Katarzyna Sawicka
Cc: r-help@r-project.org
Subject: Re: [R] Adding text to multiple plots
On Jan 24, 2012, at 8:12 AM, ksaw wrote:
Dear R-helpers,
I am trying to add an information about the mean value for each
variable within each plot by adding text to the multiple plots in
this
way:
par(mfrow=c(2,2))
df$Date <- as.Date(df$Date, format="%d/%m/%Y")
for (i in 2:5){
plot(df$Date, df[[i]])
Mean <- mean(na.omit(df[[i]]))
text(x=max(na.omit(df[[i]])), labels=paste("Mean = ", Mean, sep=""))
}
where df is an example table:
Date A B C D
01/12/2008 3 6 3 6
14/12/2008 4 7 4 7
27/12/2008 4 5 65 8
09/01/2009 5 5 7 6
22/01/2009 23 4 8 6
04/02/2009 2 3 5 2
17/02/2009 4 65 4 2
02/03/2009 5 6 3 2
15/03/2009 5 7 3 5
28/03/2009 6 7 2 5
10/04/2009 78 5 2 6
23/04/2009 3 3 1 NA
06/05/2009 4 3 4 6
It does work if the Date is not in a date format. When changing the
Date format into date there is no output from text within a loop.
Most likely because the plot is being constructed with dates as the
x- value and your `text` call has the x's as what you are
considering to be the y-values.
Is there a way
to keep the date format as.Date and be able to print the information
about the mean on each plot?
Many thanks
Kasia
--
View this message in context:
http://r.789695.n4.nabble.com/Adding-text-to-multiple-plots-
tp4323717p
4323717.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________
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.
David Winsemius, MD
West Hartford, CT
David Winsemius, MD
West Hartford, CT
______________________________________________
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.
