On 02/19/2012 07:46 PM, Khary Richardson wrote: > Hi Eric, > > Ok I guess I have a bigger problem. The plot window opens,but nothing > is plotted. I thought that the blank window was because the code was > hanging and not plotting. I had it work once and plot, but now I just > get the blank window.
Khary, (Please keep correspondence on the list so others can jump in, and whatever answer emerges is available to others.) You need to provide more information: operating system, mpl version, backend, how you installed it. Some systematic troubleshooting is also in order. Start here: http://matplotlib.sourceforge.net/faq/index.html. Eric > > Khary > > On Mon, Feb 20, 2012 at 12:25 AM, Eric Firing <efir...@hawaii.edu > <mailto:efir...@hawaii.edu>> wrote: > > On 02/19/2012 07:08 PM, surfcast23 wrote: > > > > Hi I wrote the following script, but it hangs right after > plt.show(). I would > > really appreciate it if someone could take a look and let me know > where I'm > > messing up. Thanks in advance > > That's what show() does in a script--it displays the plot and blocks > execution until you close the window. It can be more complicated than > that depending on the version of mpl you are running. So, what version > are you running, and what is the behavior you are trying to achieve? An > animation? > > Eric > > > > > from numpy import * > > import matplotlib.pyplot as plt > > > > #H=p^2/2-cosq > > #p=dp=-dH/dq > > #q=dq=dH/dp > > > > t = 0 > > h = 0.5 > > pfa = [] #Create arrays that will hold > pf,qf values > > qfa = [] > > > > while t< 10: > > q = 1+t > > p = -sin(q+t) > > > > p1 = p > > q1 = q > > p2 = p + h/2*q1 > > q2 = q + h/2*p1 > > p3 = p+ h/2*q2 > > q3 = q+ h/2*p2 > > p4 = p+ h/2*q3 > > q4 = q+ h/2*p4 > > pf = (p +(h/6)*(p1+2*p2+3*p3+p4)) > > qf = (q +(h/6)*(q1+2*q2+3*q3+q4)) > > #pf = log10(pf) #Convert to log scale > > #qf = log10(qf) > > pfa.append(pf) #append arrays > > qfa.append(qf) > > t += h #increase time step > > > > print("test") > > plt.plot(pfa,qfa) > > print("test1") > > plt.show() > > print("tes2t") > > > > > > > > > > > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > <mailto:Matplotlib-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > > -- > StriperCoast SurfCasters Club > ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
