R help - Feb 2013 - Range difference of plot two arrays in one plot

Hello all,

When I tried to plot the following two arrays in one figure with the following:

x = c(0,0,0,10,20,30)
y = c(40,50,60,70,80,90)
plot(x, type='o', ylim=c(min(x),max(x)))
par(new=T)
plot(y, type='l', ylim=c(min(y),max(y)))

Found that the first points and last points from those two arrays are
overlapping together, but the value 30 is not equal to 90. How could I draw
those two arrays in one plot with their real values shown in the plot? i.e., x
is in the lower part of the plot and y is in the upper part of the plot.

Thanks very much!

Cheers,

Rebecca



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One method is to follow correct usage of base graphics and only use the plot
function once for each plot. To overlay, use a function like points or lines.

Another approach is to use lattice graphics or ggplot2 and give the data to
higher-level plot routines that know how to plot multiple groups of data
together.
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Sent from my phone. Please excuse my brevity.

"Yuan, Rebecca" <rebecca.yuan at bankofamerica.com> wrote:
>Hello all,
>
>When I tried to plot the following two arrays in one figure with the
>following:
>
>x = c(0,0,0,10,20,30)
>y = c(40,50,60,70,80,90)
>plot(x, type='o', ylim=c(min(x),max(x)))
>par(new=T)
>plot(y, type='l', ylim=c(min(y),max(y)))
>
>Found that the first points and last points from those two arrays are
>overlapping together, but the value 30 is not equal to 90. How could I
>draw those two arrays in one plot with their real values shown in the
>plot? i.e., x is in the lower part of the plot and y is in the upper
>part of the plot.
>
>Thanks very much!
>
>Cheers,
>
>Rebecca
>
>
>
>----------------------------------------------------------------------
>This message, and any attachments, is for the intended
>r...{{dropped:5}}
>
>______________________________________________
>R-help at r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

Hello David,

When I used the same ylim for both plots, I got what I need:

x = c(0,0,0,10,20,30)
y = c(40,50,60,70,80,90)
plot(x, type='o', ylim=c(min(x,y),max(x,y)))
par(new=T)
plot(y, type='l', ylim=c(min(x,y),max(x,y)))

Thanks,

Rebecca

-----Original Message-----
From: David Winsemius [mailto:dwinsemius at comcast.net] 
Sent: Friday, February 01, 2013 11:39 AM
To: Yuan, Rebecca
Subject: Re: [R] Range difference of plot two arrays in one plot


On Feb 1, 2013, at 10:28 AM, Yuan, Rebecca wrote:
> Hello all,
>
> When I tried to plot the following two arrays in one figure with the
> following:
>
> x = c(0,0,0,10,20,30)
> y = c(40,50,60,70,80,90)
> plot(x, type='o', ylim=c(min(x),max(x)))
> par(new=T)
> plot(y, type='l', ylim=c(min(y),max(y)))
>
> Found that the first points and last points from those two arrays are 
> overlapping together, but the value 30 is not equal to 90. How could I 
> draw those two arrays in one plot with their real values shown in the 
> plot? i.e., x is in the lower part of the plot and y is in the upper 
> part of the plot.
>
Use the same ylim for each plot?

-- 

David Winsemius, MD
Alameda, CA, USA

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