# [R] Side by side strip charts

Peter Ehlers ehlers at ucalgary.ca
Sat Jul 14 02:20:14 CEST 2012

```On 2012-07-13 11:37, Rui Barradas wrote:
> Hello,
>
> Or maybe the argument 'pos' of axis().
>
>
> stripchart(list(sample1=x1,sample2=x2,sample3=x3),
>              method="stack",
>              pch=4,
>              offset=1/2,
>              col="blue",
>              lwd=2,
>              las=1,
>              xlim=c(53, 77),
>              xaxt="n")
> axis(1, at = seq(55, 75, by=5), lwd=2)
> axis(1, at = seq(55, 75, by=5), pos=1.90, lwd=2)
> axis(1, at = seq(55, 75, by=5), pos=2.90, lwd=2)
>
>
>
> Hope this helps,
>

It seemed like a good exercise to try to imitate the plot
posted by the OP (on Nabble) a bit more closely; so here's
my attempt:

## x-axis values to print
myat <- seq(55, 75, 5)

## adjust plot margins to accommodate side 4 labels
par(mar = c(4,2,2,6), oma = rep(1,4))

## do the plot without axes or frame
stripchart(list(sample1=x1,sample2=x2,sample3=x3),
method = "stack",
pch = 4,
offset = 1/2,
col = "blue",
lwd = 2,
xlim = c(53, 77),
axes = FALSE)

## add the axes; tcl=-0.5 is the default; not really needed
axis(1, at = myat, tcl = -0.5)
axis(1, at = myat, pos = 1.90, tcl = -0.5)
axis(1, at = myat, pos = 2.90, tcl = -0.5)

## reprint the axes without labels; ticks are upward
axis(1, at = myat, labels = NA, tcl = 0.5)
axis(1, at = myat, labels = NA, pos = 1.90, tcl = 0.5)
axis(1, at = myat, labels = NA, pos = 2.90, tcl = 0.5)

## do the right-side axis, labels only
axis(4, at = (1:3)-0.1,
labels = paste("Sample",1:3), las = 1, lwd = 0)

## extend horizontal axis lines
abline(h = (1:3)-0.1, lwd = 2)

## add the frame; it's in a bit from the outer edges
## due to the 'oma=' par setting
box("figure")

Peter Ehlers

>
> Em 13-07-2012 19:24, John Kane escreveu:
>> try something like
>> abline(h=1.9)
>>
>> John Kane
>>
>>
>>> -----Original Message-----
>>> Sent: Fri, 13 Jul 2012 09:54:35 -0700 (PDT)
>>> To: r-help at r-project.org
>>> Subject: Re: [R] Side by side strip charts
>>>
>>> OK, got this far:
>>>
>>> x1 <- round(rnorm(10,60,3))
>>> x2 <- round(rnorm(10,65,3))
>>> x3 <- round(rnorm(10,70,3))
>>> stripchart(list(sample1=x1,sample2=x2,sample3=x3),
>>>              method="stack",
>>>              pch=4,
>>>              offset=1/2,
>>>              col="blue",
>>>              lwd=2,
>>>              las=1)
>>>
>>> Any ideas on how to get an axes drawn under each one as in the image?
>>>
>>> Thanks.
>>>
>>> David Arnold
>>> College of the Redwoods
>>> http://msemac.redwoods.edu/~darnold/index.php
>>>
>>> --
>>> View this message in context:
>>> http://r.789695.n4.nabble.com/Side-by-side-strip-charts-tp4636399p4636464.html
>>> Sent from the R help mailing list archive at Nabble.com.
>>>
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