[R] double-axis labels function of each other

[Jim Lemon]

Hi Hurr,
The problem is with the quotes in xlab="". In your version the quotes are
not ASCII double quotes but some sort of "smart" quotes. Either your email
client has substituted them or more likely, you are editing your code in
something like MS Word and cutting and pasting the result into R. Try just
typing this in R:

plot(x1,x2,type="l",xlab="")

and the first error should not appear. The error with "mtext" is the same
problem. The reason that the x axis label is in the wrong place is that it
is not suppressed in the initial plot.

Jim


On Fri, Apr 3, 2015 at 3:44 PM, Hurr <hill0093 at umn.edu> wrote:

> Thanks, That was good help; I tried this; I hope I didn't copy it wrong:
>
> #try 2 axes at bottom
> x1 <- c(1,2,3,4,5,6,7,8,9)
> x2 <- c(5,1,9,6,3,7,8,2,4)
> par(mar=c(7,4,4,2))
> plot(x1,x2,type="l",xlab=””) #scatter plot x1 on horiz, x2 on vert axis
> require(plotrix)
> fullaxis(1,at=pretty(x1),labels=round(1/pretty(x1),3),tick=TRUE,
>  col=”red”,col.axis=”red”,lwd=4,pos=-0.2)
> mtext(“x1”,side=1,line=4.5)
>
> This is the response I got.
>
> > #try 2 axes at bottom
> > x1 <- c(1,2,3,4,5,6,7,8,9)
> > x2 <- c(5,1,9,6,3,7,8,2,4)
> > par(mar=c(7,4,4,2))
> > plot(x1,x2,type="l",xlab=””) #scatter plot x1 on horiz, x2 on vert axis
> Error: unexpected input in "plot(x1,x2,type="l",xlab=”"
> > require(plotrix)
> > fullaxis(1,at=pretty(x1),labels=round(1/pretty(x1),3),tick=TRUE,
> +  col=”red”,col.axis=”red”,lwd=4,pos=-0.2)
> Error: unexpected input in:
> "fullaxis(1,at=pretty(x1),labels=round(1/pretty(x1),3),tick=TRUE,
>  col=”"
> > mtext(“x1”,side=1,line=4.5)
> Error: unexpected input in "mtext(“"
> >
>
> This works but the X-axis name is not in right place:
>
> #try 2 axes at bottom
> x1 <- c(1,2,3,4,5,6,7,8,9)
> x2 <- c(5,1,9,6,3,7,8,2,4)
> par(mar=c(7,4,4,2))
> plot(x1,x2,type="l") #scatter plot x1 on horiz, x2 on vert axis
> require(plotrix)
> fullaxis(1,at=pretty(x1),labels=round(1/pretty(x1),2),tick=TRUE,
>  lwd=4,pos=-0.2)
>
>
>
>
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>
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