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Re: [O] Generating boxplot (candlestick) diagrams (babel or orgplot)
From: 
Eric Schulte 
Subject: 
Re: [O] Generating boxplot (candlestick) diagrams (babel or orgplot) 
Date: 
Sun, 08 Jan 2012 09:38:01 0700 
Useragent: 
Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux) 
Karl Voit <address@hidden> writes:
> Hi!
>
> I'm new to babel/gnuplot/orgplot and want to generate classic
> Boxplot[1] diagrams.
>
> My tests failed so far:
>
> #+TBLNAME: mydata
> #+PLOT: title:"Boxplots of mydata" with:candlesticks
>  A  B 
> +
>  5  5 
>  5  6 
>  4  5 
>  5  6 
>  2  4 
>  2  5 
>
> ... with «orgplot/gnuplot» results in:
> #+begin_verse
> gnuplotmode 0.6.0 (gnuplot 4.4)  report bugs with "Cc Cu"
> Starting gnuplot plotting program...Done
>
> #+end_verse
>
> ... with nothing else.
>
>
> #+begin_src gnuplot :var data=mydata :file output.png
> set title "Plot Test"
>
> plot data using 1:2 with candlestick
> #+end_src
>
> ... results in empty output.png file.
>
In more complex examples like these I would recommend using a gnuplot
code block rather than using Orgplot. Gnuplot has an extremely
comprehensive built in help system, typing "help boxplot" at the gnuplot
REPL returns the following.
,
 gnuplot> help boxplot
 Boxplots are a common way to represent a statistical distribution of values.
 Quartile boundaries are determined such that 1/4 of the points have a value
 equal or less than the first quartile boundary, 1/2 of the points have a
value
 equal or less than the second quartile (median) value, etc. A box is drawn
 around the region between the first and third quartiles, with a horizontal
line
 at the median value. Whiskers extend from the box to userspecified limits.
 Points that lie outside these limits are drawn individually.

 Examples

 # Place a boxplot at x coordinate 1.0 representing the y values in
column 5
 plot 'data' using (1.0):5

 ...
`
Also see the help for "candlestick". Using this information the
attached Orgmode file generates a candlestick plot using a Gnuplot code
block.
#+Title: BoxPlots with Gnuplot
#+Options: ^:nil
#+name: sample
 x  box_min  whisker_min  whisker_high  box_high 
++++
 1  2  0  6  4 
 2  3  1  7  5 
 3  4  2  8  6 
 4  5  3  9  7 
 5  6  4  10  8 
 6  7  5  11  9 
#+begin_src gnuplot :var data=sample :results silent
set xrange [0:7]
plot data using 1:2:3:4:5 with candlesticks
#+end_src
Best,
>
>
> What is the problem here? At least the second method should end up
> in an error message or a file with content I guess.
>
> 1. http://en.wikipedia.org/wiki/Boxplot

Eric Schulte
http://cs.unm.edu/~eschulte/