# [R] force axis to extend

Jen plessthanpointohfive at gmail.com
Thu Mar 16 14:27:56 CET 2017

```Hi Jim,

Unfortunately, that doesn't work.   The axis automatically scales to (-30,
25, by 5).

Jen

On Wed, Mar 15, 2017, 10:09 PM Jim Lemon <drjimlemon at gmail.com> wrote:

> Hi Jen,
> It seems way too simple, but does this work?
>
> axis(side=2,at=seq(-35,35,by=5),cex.axis=0.7)
>
> You may want to consider using a pyramid plot for this.
>
> Jim
>
>
> On Thu, Mar 16, 2017 at 11:45 AM, Jen <plessthanpointohfive at gmail.com>
> wrote:
> > Hi,  I'm creating a couple of mirrored bar plots.  Below is data and code
> > for one.
> >
> > My problem is that I need the axis to go from -35 to 35 by 5.  I can't
> get
> > that to happen with the code below.  I need it so all my plots are on the
> > same scale.
> >
> > How can I do that using barplot? For reasons, I can't use ggplot or
> > lattice.
> >
> > Thanks,
> >
> > Jen
> >
> >
> >
> > df <- data.frame(matrix(c(
> > '18-29',        'Females',      23.221039,
> > '30-44',        'Females',      16.665565,
> > '45-59',        'Females',      7.173238,
> > '60+',  'Females',      4.275979,
> > '18-29',        'Males',        -22.008875,
> > '30-44',        'Males',        -15.592936,
> > '45-59',        'Males',        -7.312195,
> > '60+',  'Males',        -3.750173),
> > nrow=8, ncol=3, byrow=T,
> > dimnames=list(NULL, c("Age", "Sex", "Percent"))))
> >
> > df\$Percent <- as.numeric(as.character(df\$Percent))
> >
> > midf <- barplot(height = df\$Percent[df\$Sex == "Females"])
> >
> > # distribution of men and women with solid fill
> >
> > plot(c(0,5),range(df\$Percent),type = "n", axes=FALSE, ann=F)
> >
> > barplot(height = df\$Percent[df\$Sex == "Females"], add = TRUE,axes =
> FALSE,
> > col="#b498ec", ylab="")
> >
> > barplot(height = df\$Percent[df\$Sex == "Males"], add = TRUE, axes = F,
> > col="#f8bb85", ylab="",
> >         names.arg=c("18-29", "30-44", "45-59", "60+"))
> >
> > axis(side=2, at = seq(-35,35,by=5),
> >      labels=format(abs(seq(-35,35,by=5)), scientific=F),
> >      cex.axis=0.7)
> >
> >         [[alternative HTML version deleted]]
> >
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