gnuplot-info

[Gnuplot-info] 'column scatter plot'

[Adrian G. <har...@gm...>]

Hello,

I would like to plot (gene expression) values of two groups, say control 
and treated. Each group has several samples. I assign x-value 1 to group 
'control' and 2 to 'treated'.

Example for group 1:
x	expression
1	3
1	5
1	8
1	3.5
1	3.4
1	3.3
1	3.7
1	10
1	6
1	7
1	6.5
(I set y-range to [0:10])

Unfortunately, symbols of expression (y) values that are very close 
overlap, thus, obscuring each other. It would be better to plot it like 
in the graph given here:
http://www.graphpad.com/faq/viewfaq.cfm?faq=145

Can that be done in gnuplot as well? Maybe using an 'if' command? Note: 
There are too many values to do it manually, I'm afraid.

Grateful for any comments,

adrian

Re: [Gnuplot-info] 'column scatter plot'

[Lars H. <la...@ho...>]

> Unfortunately, symbols of expression (y) values that are
> very close overlap, thus, obscuring each other. It would
> be better to plot it like in the graph given here:
> http://www.graphpad.com/faq/viewfaq.cfm?faq=145
>
> Can that be done in gnuplot as well? Maybe using an 'if'
> command? Note: There are too many values to do it
> manually, I'm afraid.

Hi Adrian,
the graph example you give uses equal piont types and sizes 
for all datapoints, which is the most reader-friendly way 
to handle the problem. 
gnuplot offers as well several point symbols as almoust free 
chosen size of these symbols (depends from the abilities of 
the terminal type). Maybe you'd like to consult the fine 
manual on these topis:
  help pointsize
  help style 
  help set style

HTH
Lars

Re: [Gnuplot-info] 'column scatter plot'

[Adrian G. <har...@gm...>]

Hi Lars,

Lars Hoegen wrote:
  Maybe you'd like to consult the fine
> manual on these topis:
>   help pointsize
>   help style 
>   help set style

Thanks for the hints. I'll definitely look into it.

Adrian