I’ll try that. Thank you again.
From: Richard M. Heiberger <r...@temple.edu>
Date: Tuesday, February 2, 2021 at 5:20 PM
To: Parkhurst, David F. <parkh...@indiana.edu>, r-sig-mac@r-project.org
<r-sig-mac@r-project.org>
Subject: Fw: Question about stripchart
months<-c("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec")
monames.factor <- factor(monamescon$monames, levels=months)
stripchart(conc~monames.factor, data=monamescon, vert=TRUE)
read the help file
?factor
and see that the levels factor must contain unique values.
Please always keep the list as a recipient when you respond.
This question belongs on r-h...@r-project.org
because it is not Macintosh specific.
Any followup should be sent to r-h...@r-project.org
________________________________________
From: Parkhurst, David F. <parkh...@indiana.edu>
Sent: Tuesday, February 2, 2021 4:29 PM
To: Richard M. Heiberger
Subject: Re: Question about stripchart
Hmm. I’m guessing that this might work with my stripchart problem:
Define
months<-c("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec")
Then use mofac<-factor(months, months)
Then set up a vector of 73 elements like
mos<-c(mofac[4],mofac[4],…,mofac[12])
Then my call to stripchart would be (conc~mos, …)
Is that what I need to do?
From: Richard M. Heiberger <r...@temple.edu>
Date: Monday, February 1, 2021 at 9:10 PM
To: Parkhurst, David F. <parkh...@indiana.edu>
Subject: Re: Question about stripchart
month.factor <- factor(month.name, month.name)
> month.name
[1] "January" "February" "March" "April" "May" "June"
[7] "July" "August" "September" "October" "November" "December"
> class(month.name)
[1] "character"
> month.factor <- factor(month.name, month.name)
> levels(factor(month.name))
[1] "April" "August" "December" "February" "January" "July"
[7] "June" "March" "May" "November" "October" "September"
> levels(factor(month.factor))
[1] "January" "February" "March" "April" "May" "June"
[7] "July" "August" "September" "October" "November" "December"
>
________________________________________
From: R-SIG-Mac <r-sig-mac-boun...@r-project.org> on behalf of Parkhurst, David
F. <parkh...@indiana.edu>
Sent: Monday, February 1, 2021 8:53 PM
To: r-sig-mac@r-project.org
Subject: [R-SIG-Mac] Question about stripchart
I have E. coli data (variable �conc�) for 73 dates over months from Apr through
Dec (variable �monames�). The data are in order from the April through
December, and are in a data.frame titled "monamescon�. When I run
stripchart(conc~monames, data=monamescon, vert=TRUE), the months come out in
alphabetical order along the x axis. How can I get them to come out in time
order instead?
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