How to plot two variables using a secondary Y axis

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How to plot two variables using a secondary Y axis

Felipe Carrillo
          Date  Fo  Co    6/27/2007  57.1  13.9    6/28/2007  57.7  14.3    6/29/2007  57.8  14.3    6/30/2007  57  13.9    7/1/2007  57.1  13.9    7/2/2007  57.2  14.0    7/3/2007  57.3  14.1    7/4/2007  57.6  14.2    7/5/2007  58  14.4    7/6/2007  58.1  14.5    7/7/2007  58.2  14.6    7/8/2007  58.4  14.7    7/9/2007    58.7
    14.8
   
  Hello all:
  I am a newbie to R, and I was wondering how can I plot the Temperature values above using Lattice or ggplot2 code. I want Date(X axis), Degrees F(Y axis) and Degrees C( on a secondary Y axis).
  Thanks
   
   
   
   
   
   
   
   

       
---------------------------------

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Re: How to plot two variables using a secondary Y axis

Sundar Dorai-Raj


Felipe Carrillo said the following on 7/10/2007 7:58 AM:
>           Date  Fo  Co    6/27/2007  57.1  13.9    6/28/2007  57.7  14.3    6/29/2007  57.8  14.3    6/30/2007  57  13.9    7/1/2007  57.1  13.9    7/2/2007  57.2  14.0    7/3/2007  57.3  14.1    7/4/2007  57.6  14.2    7/5/2007  58  14.4    7/6/2007  58.1  14.5    7/7/2007  58.2  14.6    7/8/2007  58.4  14.7    7/9/2007    58.7
>     14.8
>    
>   Hello all:
>   I am a newbie to R, and I was wondering how can I plot the Temperature values above using Lattice or ggplot2 code. I want Date(X axis), Degrees F(Y axis) and Degrees C( on a secondary Y axis).
>   Thanks
>    
>    
>    

For lattice, see this thread:

http://finzi.psych.upenn.edu/R/Rhelp02a/archive/102768.html

HTH,

--sundar

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Re: How to plot two variables using a secondary Y axis

Gabor Grothendieck
In reply to this post by Felipe Carrillo
We assume the Fo and Co represent the same data except in different
units (this seems to be approximately the case) so there is really
only one variable being measured here.  If that's not the case let
me know. Below we read the data, define enough padding around plot
to do what we want, call xyplot, draw the right axis and add the right
y lablel.

library(lattice)
library(grid)  # needed for grid.text

# data

Lines.raw <- "Date  Fo  Co
6/27/2007  57.1  13.9
6/28/2007  57.7  14.3
6/29/2007  57.8  14.3
6/30/2007  57  13.9
7/1/2007  57.1  13.9
7/2/2007  57.2  14.0
7/3/2007  57.3  14.1
7/4/2007  57.6  14.2
7/5/2007  58  14.4
7/6/2007  58.1  14.5
7/7/2007  58.2  14.6
7/8/2007  58.4  14.7
7/9/2007    58.7 14.8
"
# in reality next stmt would be DF <- read.table("myfile.dat", header = TRUE)
DF <- read.table(textConnection(Lines.raw), header = TRUE)
DF$Date <- as.Date(DF$Date, "%m/%d/%Y")

par.settings <- list(
        layout.widths = list(left.padding = 10, right.padding = 10),
        layout.heights = list(bottom.padding = 10, top.padding = 10)
)

xyplot(Co ~ Date, DF, default.scales = list(y = list(relation = "free")),
        ylab = "C", par.settings = par.settings)

trellis.focus("panel", 1, 1, clip.off = TRUE)
  pr <- pretty(DF$Fo)
  at <- 5/9 * (pr - 32)
  panel.axis("right", at = at, lab = pr, outside = TRUE)
  grid.text("F", x = 1.1, rot = 90) # right y axis label
trellis.unfocus()



On 7/10/07, Felipe Carrillo <[hidden email]> wrote:

>          Date  Fo  Co    6/27/2007  57.1  13.9    6/28/2007  57.7  14.3    6/29/2007  57.8  14.3    6/30/2007  57  13.9    7/1/2007  57.1  13.9    7/2/2007  57.2  14.0    7/3/2007  57.3  14.1    7/4/2007  57.6  14.2    7/5/2007  58  14.4    7/6/2007  58.1  14.5    7/7/2007  58.2  14.6    7/8/2007  58.4  14.7    7/9/2007    58.7
>    14.8
>
>  Hello all:
>  I am a newbie to R, and I was wondering how can I plot the Temperature values above using Lattice or ggplot2 code. I want Date(X axis), Degrees F(Y axis) and Degrees C( on a secondary Y axis).
>  Thanks
>
>
>
>
>
>
>
>
>
>
> ---------------------------------
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> [hidden email] 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.
>

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Re: How to plot two variables using a secondary Y axis

hadley wickham
In reply to this post by Felipe Carrillo
On 7/10/07, Felipe Carrillo <[hidden email]> wrote:
>           Date  Fo  Co    6/27/2007  57.1  13.9    6/28/2007  57.7  14.3    6/29/2007  57.8  14.3    6/30/2007  57  13.9    7/1/2007  57.1  13.9    7/2/2007  57.2  14.0    7/3/2007  57.3  14.1    7/4/2007  57.6  14.2    7/5/2007  58  14.4    7/6/2007  58.1  14.5    7/7/2007  58.2  14.6    7/8/2007  58.4  14.7    7/9/2007    58.7
>     14.8
>
>   Hello all:
>   I am a newbie to R, and I was wondering how can I plot the Temperature values above using Lattice or ggplot2 code. I want Date(X axis), Degrees F(Y axis) and Degrees C( on a secondary Y axis).

Hi Felipe,

It's not currently possible with ggplot2, but it is something on my to do list.

Hadley

______________________________________________
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and provide commented, minimal, self-contained, reproducible code.