# Re: [R] Graph with values of coordinates of points in x axis

From: Romain Francois <francoisromain_at_free.fr>
Date: Wed 15 Jun 2005 - 18:49:56 EST

Le 15.06.2005 10:35, Massimiliano Tripoli a écrit :

>Hi all,
>
>I want to draw a line with the values of x marked in X axis.
>
>I tried with
>x <- c(0,6,12,18,24,30) #coordinates of points x
>y <- c(2,5,7,5,7,16) #coordinates of points y
>plot(x,type="n",xlab="Months",ylab="Y
>values",main="main",ylim=c(0,16),xlim=c(0,30))
>lines(x,y)
>
>The graph shows by default an increment of the sequence in x axis that I'm
>not able to change.
>I'would like to have 0,6,12,18,24,30 and not 0,10,15,20,25,30.
>Any hint is appreciated.
>
>
Hello, you can do what you want by doing a call to axis, thus in the plot call you have to use : axes=F

x <- c(0,6,12,18,24,30) #coordinates of points x y <- c(2,5,7,5,7,16) #coordinates of points y plot(x,type="n",xlab="Months",ylab="Y
values",main="main",ylim=c(0,16),xlim=c(0,30),axes=F) axis(2)
axis(1,(0:5)*6)
lines(x,y)
box()

Romain

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