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Get a more recent version,
and you will get a more helpful message.

As far as I know, your date strings are
not yet supported by Data?  (See the conversion
done by ``utils.float_array``.)

Cheers,
Alan Isaac

Hello all, I appreciate the answer to one of the big questions last 
week.  I am now experiencing some other difficulties and I sure could 
use some help. I am attempting to plot a set of sensor readings vs. 
time.  I have a mock set of data, and I will show the error message I 
receive when I run it.  Thank you again for the help!

import Gnuplot
g = Gnuplot.Gnuplot(debug=1)
name = 'Plot.png'
g('set term png')
g('set out "' + name)
g('set key outside')
g('set xdata time')

g('set timefmt "%m/%d/%Y"')
g('set title "Yippy"')
mylist = [ ('06/01/2000',  81.75),
('07/01/2000', 52.125),
('08/01/2000', 50.3125),
('09/01/2000', 61.3125),
('10/01/2000', 26.6875),
('11/01/2000', 19.4375),
('12/01/2000', 17),
('01/01/2001', 14.875),
('02/01/2001', 20.6875),
('03/01/2001', 17.8125),
('04/01/2001', 22.09),
('05/01/2001', 25.41),
('06/01/2001', 20.13),
('07/01/2001', 23.64),
('08/01/2001', 19.01)]
plot = Gnuplot.PlotItems.Data(mylist, with="histeps", title="charlie")
g.plot(plot)

Now the error I receive is:
Traceback (most recent call last):
  File "./graphictest.py", line 27, in <module>
    plot = Gnuplot.PlotItems.Data(mylist, with="histeps", title="charlie")
  File "/usr/lib/python2.5/site-packages/Gnuplot/PlotItems.py", line 
513, in Data
    set = utils.float_array(set[0])
  File "/usr/lib/python2.5/site-packages/Gnuplot/utils.py", line 41, in 
float_array
    return Numeric.asarray(m, Numeric.Float)
  File "/usr/lib/python2.5/site-packages/Numeric/Numeric.py", line 134, 
in asarray
    return multiarray.array(a, typecode, copy=0, savespace=savespace)
TypeError: object of type 'float' has no len()

I have attempted to debugg this myself and have been having no luck.  I 
look at the 'float' has no len() and realize that their is some sort of 
casting error perhaps?  Is it looking at the data points and assuming 
that they are strings? I am baffled.

Thank you again for your help.

Gerald Rude

Use with_ instead.

Gil

On Sat, Jul 26, 2008 at 3:13 AM, Gerald Rude <gd...@gm...> wrote:

> Thank you for the wonderful tool you have given us.  Gnuplot.py is
> amazing.  I am having some difficulty though and I would love a
> workaround or solution to a problem I am experiencing.  I am having
> difficulty with "with" being a reserved word in python. For instance:
>
> plot1=Gnuplot.PlotItems.Data(list_tuple, with = "linetype", title =
> "title")
>
> g.plot(plot1)
>
> I receive an error:
> SyntaxError: invalid syntax
> and Idle highlights "with"
>
> Any help would be appreciated.  I was hoping to solve the problem
> without resorting to writing the data to a txt file and then hacking
> together a plot script all the time.
>
>
> Thank you again!
> Gerald Rude
>
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Thank you for the wonderful tool you have given us.  Gnuplot.py is 
amazing.  I am having some difficulty though and I would love a 
workaround or solution to a problem I am experiencing.  I am having 
difficulty with "with" being a reserved word in python. For instance:

plot1=Gnuplot.PlotItems.Data(list_tuple, with = "linetype", title = 
"title")

g.plot(plot1)

I receive an error:
SyntaxError: invalid syntax
and Idle highlights "with"

Any help would be appreciated.  I was hoping to solve the problem 
without resorting to writing the data to a txt file and then hacking 
together a plot script all the time.


Thank you again!
Gerald Rude

Is Gunplot.py 1.8 compatible with 64 bit operating systems?

I am using Python 2.5.2 and gnuplot 4.2 patch level 2 on Ubuntu 8.04 x86_64.
I've seen some old posts expressing problems with gnuplot.py 1.7 and python
2.4. Specifically, my problems arise when I try to use Gnuplot.Data().

Warning: empty x range [0:0], adjusting to [-1:1]
Warning: empty y range [0:0], adjusting to [-1:1]

My code runs on a 32 bit installation.

#!/usr/bin/env python

from numpy.core import numeric
import Gnuplot, Gnuplot.funcutils

list = range(25)
tuplelist = []
for j in range(len(list)):
    a = (list[j],list[j]**2)
    tuplelist.append(a)
print tuplelist
g = Gnuplot.Gnuplot(debug=1)
g.plot(tuplelist)

[Please don't send Gnuplot.py emails directly to me.  I am directing a
CC of this response to the gnuplot-py-users mailing list.]

Pierre Jaury wrote:
> I have used Gnuplot and Gnuplot-Py for a long time on a linux system.
> I recently tried to plot some data from a file under Windows.
> Gnuplot-py returns no error cause everything is reported by gnuplot.exe,
> which seems no to accept filenames containing "\".
> I didn't have a close eye on that problem and simply used replace, but
> it would be nice to report it to gnuplot developpers and to keep
> compatibility.

Good idea.  Please do that.  I suggest that you tell them exactly what
commands are being sent from Gnuplot.py to gnuplot (e.g., by
initializing your Gnuplot object with the debug=1 option) and what
errors result, as they will probably not be familiar with Gnuplot.py
themselves.

Michael

Hi,
   I just started with both gnuplot and gnuplot-py and I'm wondering how 
I can tell the wrapper to execute a command like "plot file using 1:2" ?
My X axis is a timestamp and I'm trying to format it with
set xdata time
set timefmt %s
set format x "..."

All I get is "Need full using spec for x time data"...

Regards,
   Alex