Thank you for the immediate and extremely helpful suggestions. Changing the
string to a tuple works great, and I did not think about using the "label"
keyword in plot. I think this will greatly simplify the plotting.
Thanks again for the "instant gratification". :)
Charles
==========
The 2nd Law of Thermodynamics... If you think things are a mess now, JUST
WAIT!
On Tue, Sep 16, 2008 at 3:28 PM, Jae-Joon Lee <[EMAIL PROTECTED]> wrote:
> ('CO2') is not a tuple but still a single string.
> You may use a list ['CO2'] or put an extra "," to make it a tuple
> ('CO2',).
>
> And, you may consider to use the "label" keyword with your plot command.
> IHTH,
>
> -JJ
>
>
>
> On Tue, Sep 16, 2008 at 5:09 PM, charles reid <[EMAIL PROTECTED]>
> wrote:
> > Hi there -
> >
> > I'm using the latest stable pylab/matplotlib (0.98.3) via OS X 10.5.4. I am
> > plotting a simple array of data, and I'm getting some strange behavior
> when
> > I try to add a legend to the plot.
> > First, the plot without the legend:
> >
> > f=figure(1)
> > title("Equilibrium Concentration vs. Equivalence Ratio")
> > line1 = plot(phi,xeq[1])
> > show()
> >
> > This works fine. However, when I try to add a legend, I get an error. I
> > add this:
> >
> > f=figure(1)
> > title("Equilibrium Concentration vs. Equivalence Ratio")
> > line1 = plot(phi,xeq[1])
> > f.legend(line1,('CO2'),loc=(0.8,0.8))
> > show()
> >
> > And it gives me an error because of the second argument to f.legend:
> >
> >
> ---------------------------------------------------------------------------
> > ValueError Traceback (most recent call
> last)
> >
> > /Users/charles/Documents/school/combustion/problem-2-52/adiabatic.py in
> > <module>()
> > 111 title("Equilibrium Concentrations vs. Equivalence Ratio")
> > 112 line1=plot(phi,xeq[1])
> > --> 113 f.legend(line1,('CO2'),loc=(0.8,0.8))
> > 114 show()
> > 115
> >
> >
> /Library/Python/2.5/site-packages/matplotlib-0.98.3-py2.5-macosx-10.3-i386.egg/matplotlib/figure.pyc
> > in legend(self, handles, labels, *args, **kwargs)
> > 841 """
> > 842 handles = flatten(handles)
> > --> 843 l = Legend(self, handles, labels, *args, **kwargs)
> > 844 self.legends.append(l)
> > 845 return l
> >
> >
> /Library/Python/2.5/site-packages/matplotlib-0.98.3-py2.5-macosx-10.3-i386.egg/matplotlib/legend.pyc
> > in __init__(self, parent, handles, labels, loc, numpoints, prop, pad,
> > markerscale, labelsep, handlelen, handletextsep, axespad, shadow)
> > 180 textleft = left+ self.handlelen+self.handletextsep
> > 181 self.texts = self._get_texts(labels, textleft, top)
> > --> 182 self.legendHandles = self._get_handles(handles,
> self.texts)
> > 183
> > 184 self._drawFrame = True
> >
> >
> /Library/Python/2.5/site-packages/matplotlib-0.98.3-py2.5-macosx-10.3-i386.egg/matplotlib/legend.pyc
> > in _get_handles(self, handles, texts)
> > 246 # centered marker proxy
> > 247
> > --> 248 for handle, label in safezip(handles, texts):
> > 249 if self.numpoints > 1:
> > 250 xdata = np.linspace(left, left + self.handlelen,
> > self.numpoints)
> >
> >
> /Library/Python/2.5/site-packages/matplotlib-0.98.3-py2.5-macosx-10.3-i386.egg/matplotlib/cbook.pyc
> > in safezip(*args)
> > 899 for i, arg in enumerate(args[1:]):
> > 900 if len(arg) != Nx:
> > --> 901 raise ValueError(_safezip_msg % (Nx, i+1, len(arg)))
> > 902 return zip(*args)
> > 903
> >
> > ValueError: In safezip, len(args[0])=1 but len(args[1])=3
> > WARNING: Failure executing file: <adiabatic.py>
> >
> > I don't understand why this doesn't work, because I should be able to
> give a
> > label of arbitrary length. It doesn't work when I replace single quotes
> > with double quotes, either. But I change the length to 1, like it wants:
> >
> > f=figure(1)
> > title("Equilibrium Concentrations vs. Equivalence Ratio")
> > line1=plot(phi,xeq[1])
> > f.legend(line1,('C'),loc=(0.8,0.8))
> > show()
> >
> > Which creates a plot, with a legend, but when I move the mouse over the
> > plot, it has the "thinking" cursor (hourglass). I can't close the
> window
> > using the buttons in the upper left hand corner, I can't close it using
> > close(1), and I can't close it using close('all'). I end up having to
> run
> > 'killall Python' from a command line.
> >
> > I can get the plot with the legend to work, albeit with only ONE
> character
> > for the name, by running (from Python)
> >
> > f=figure(1)
> > title("Equilibrium Concentrations vs. Equivalence Ratio")
> > line1=plot(phi,xeq[1])
> > f.legend(line1,('C'),loc=(0.8,0.8))
> >
> > (without the show() command) in the script, then running show() when the
> > script is done, and I don't get the "thinking" cursor.
> >
> > Note: I have also used the function figlegend() with the exact same
> > results/problems.
> >
> > 1. How can I give a legend name with a length of more than 1 character?
> > What am I doing wrong?
> > 2. What is causing the behavior with the thinking cursor?
> >
> >
> > Also, ultimately I would like to make a plot with 30+ species, instead of
> > just CO2. Is there a way to do this other than doing the following?
> >
> > line1 line2 line3 ........ =
> > plot(phi,xeq[1],phi,xeq[2],phi,xeq[3],...........)
> >
> f.legend((line1,line2,...........),(name[0],name[1],name[2],................),loc=(0.8,0.8))
> >
> > Thanks ahead of time for any suggestions or hints.
> >
> >
> >
> > Charles
> >
> >
> >
> >
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