gnuplot-py-users

[Gnuplot-py-users] Plot list of PlotItems

[Felix U. <fel...@ui...>]

Hi there,

i have following problem:
i want to plot a number of lines. The number of lines can be set by an 
user option, so i don't know it in advance. I thought of using a list of 
Data PlotItems. Establishing the PlotItem list works, however sending it 
to g.plot fails. Any idea how to do this/ work around it.

Here's a testcode to illustrate what i mean:

   1 import Gnuplot
   2 from numpy import *
   3
   4 g = Gnuplot.Gnuplot(persist=1)
   5 g('set terminal x11 size 1000,680')
   6
   7 y = []
   8 y.append([1,2,3,4,5,6])
   9 y.append([1.1,2.1,3.1,4.1,5.1,6.1])
  10
  11 ga =[]
  12 ga.append(Gnuplot.Data(y[0],binary=0,with_='lines'))
  13 ga.append(Gnuplot.Data(y[1],binary=0,with_='lines'))
  14
  15
  16 # --- This of course works---
  17 #g.plot(ga[0],ga[1])
  18
  19 # --- This is what i want to work :-) ---
  20 g.plot(ga)


Looking forward to your answers!

regards,
Felix

[Gnuplot-py-users] Plot list of PlotItems

[Cuneyt E. <cun...@gm...>]

Hi,

I wan to plot more than one curve in the same graph using same function with
different parameters. The following code works without problem.

from numpy import *
import Gnuplot

gp = Gnuplot.Gnuplot(persist=1)
x = arange(0,1,0.01,dtype='float_')
d1 = Gnuplot.Data(x, ozfonksiyon(omegalar[0],x), title='1. ozdeger',
with_='lines')
d2 = Gnuplot.Data(x, ozfonksiyon(omegalar[1],x), title='2. ozdeger',
with_='lines')
d3 = Gnuplot.Data(x, ozfonksiyon(omegalar[2],x), title='3. ozdeger',
with_='lines')
d4 = Gnuplot.Data(x, ozfonksiyon(omegalar[3],x), title='4. ozdeger',
with_='lines')
d5 = Gnuplot.Data(x, ozfonksiyon(omegalar[4],x), title='5. ozdeger',
with_='lines')
gp.plot(d1,d2,d3,d4,d5)

in this code ozfonksiyon and omegalar are user defined functions. But what I
want is to create plotitems (d1,d2,d3,d4,d5) in a for loop. I modified the
code like below,

for ii in range(n):
    datalar.append("Gnuplot.Data(x, ozfonksiyon(omegalar["+str(ii)+"],x),
with_='lines')")
gp.plot(*datalar)

I get this error.

/usr/bin/python -u  "/media/disk/doktora_tezi/tek_cubuk/python_files/CALISAN
KOD/fix_free_controlled_parametrelerin_degisimi_deneme.py"

gnuplot> plot Gnuplot.Data(x, ozfonksiyon(omegalar[0],x), with_='lines') ,
Gnuplot.Data(x, ozfonksiyon(omegalar[1],x), with_='lines') , Gnuplot.Data(x,
ozfonksiyon(omegalar[2],x), with_='lines') , Gnuplot.Data(x,
ozfonksiyon(omegalar[3],x), with_='lines') , Gnuplot.Data(x,
ozfonksiyon(omegalar[4],x), with_='lines')
                                                    ^
         line 0: ':' expected

What am I doing wrong?


Best regards,

Cuneyt.

Re: [Gnuplot-py-users] Plot list of PlotItems

[Michael H. <mh...@al...>]

On 10/09/2010 11:30 PM, Cuneyt Ertal wrote:
> Hi,
> 
> I wan to plot more than one curve in the same graph using same function
> with different parameters. The following code works without problem.
> 
> from numpy import *
> import Gnuplot
> 
> gp = Gnuplot.Gnuplot(persist=1)
> x = arange(0,1,0.01,dtype='float_')
> d1 = Gnuplot.Data(x, ozfonksiyon(omegalar[0],x), title='1. ozdeger',
> with_='lines')
> d2 = Gnuplot.Data(x, ozfonksiyon(omegalar[1],x), title='2. ozdeger',
> with_='lines')
> d3 = Gnuplot.Data(x, ozfonksiyon(omegalar[2],x), title='3. ozdeger',
> with_='lines')
> d4 = Gnuplot.Data(x, ozfonksiyon(omegalar[3],x), title='4. ozdeger',
> with_='lines')
> d5 = Gnuplot.Data(x, ozfonksiyon(omegalar[4],x), title='5. ozdeger',
> with_='lines')
> gp.plot(d1,d2,d3,d4,d5)
> 
> in this code ozfonksiyon and omegalar are user defined functions. But
> what I want is to create plotitems (d1,d2,d3,d4,d5) in a for loop. I
> modified the code like below,
> 
> for ii in range(n):
>     datalar.append("Gnuplot.Data(x,
> ozfonksiyon(omegalar["+str(ii)+"],x), with_='lines')")
> gp.plot(*datalar)
> 
> I get this error.
> 
> /usr/bin/python -u 
> "/media/disk/doktora_tezi/tek_cubuk/python_files/CALISAN
> KOD/fix_free_controlled_parametrelerin_degisimi_deneme.py"
> 
> gnuplot> plot Gnuplot.Data(x, ozfonksiyon(omegalar[0],x), with_='lines')
> , Gnuplot.Data(x, ozfonksiyon(omegalar[1],x), with_='lines') ,
> Gnuplot.Data(x, ozfonksiyon(omegalar[2],x), with_='lines') ,
> Gnuplot.Data(x, ozfonksiyon(omegalar[3],x), with_='lines') ,
> Gnuplot.Data(x, ozfonksiyon(omegalar[4],x), with_='lines')
>                                                     ^
>          line 0: ':' expected
> 
> What am I doing wrong?

You shouldn't make the elements of the datalar array into strings; leave
them as Python objects:

datalar = []
for ii in range(n):
    datalar.append(
        Gnuplot.Data(x, ozfonksiyon(omegalar[ii],x), with_='lines')
        )
gp.plot(*datalar)

Michael

-- 
Michael Haggerty
mh...@al...
http://softwareswirl.blogspot.com/

Re: [Gnuplot-py-users] Plot list of PlotItems

[Michael H. <mh...@al...>]

Felix Uni wrote:
> i have following problem:
> i want to plot a number of lines. The number of lines can be set by an 
> user option, so i don't know it in advance. I thought of using a list of 
> Data PlotItems. Establishing the PlotItem list works, however sending it 
> to g.plot fails. Any idea how to do this/ work around it.
> [...]
>   19 # --- This is what i want to work :-) ---
>   20 g.plot(ga)

Use

    g.plot(*ga)

to treat the entries in the "ga" list as individual arguments to the
plot() method.

Michael

Re: [Gnuplot-py-users] Plot list of PlotItems

[Felix U. <fel...@ui...>]

AWESOME!!!!!!!

Thanks Michael for your quick reply!!

gnuplot-py rules!

Felix

Michael Haggerty wrote:
> Felix Uni wrote:
>> i have following problem:
>> i want to plot a number of lines. The number of lines can be set by an
>> user option, so i don't know it in advance. I thought of using a list of
>> Data PlotItems. Establishing the PlotItem list works, however sending it
>> to g.plot fails. Any idea how to do this/ work around it.
>> [...]
>>    19 # --- This is what i want to work :-) ---
>>    20 g.plot(ga)
>
> Use
>
>      g.plot(*ga)
>
> to treat the entries in the "ga" list as individual arguments to the
> plot() method.
>
> Michael