If you want advanced plotting things in SymPy it's often easier to plot your function directly with matplotlib using something like
import numpy as np import matplotlib.pyplot as plt a = np.linspace(-10, 10, 1000) # Replace with your desired range and number of points f = sympy.lambdify(x, expr) plt.plot(a, f(a)) # Modify the matplotlib plot using matplotlib functions here This is more or less what sympy.plot does internally. The key here is that lambdify() will convert a SymPy expression into a NumPy function which can be applied to a numpy linspace and used directly with matplotlib's plot. Aaron Meurer On Thu, Jun 27, 2019 at 1:33 PM Lee Smith <leesmith...@gmail.com> wrote: > Yep. Well I will continue to look into this. Of course, if I just did > everything in matplotlib ... no problemo CODE ON ! > > On Thu, Jun 27, 2019 at 11:59 AM Oscar Benjamin < > oscar.j.benja...@gmail.com> wrote: > >> I guess it depends what environment you use (I used ipython). Looks like >> you're using Jupyter and I'm not sure how to plotting works there. >> >> >> On Thu, 27 Jun 2019 at 19:24, Lee Smith <leesmith...@gmail.com> wrote: >> >>> Thank you ! >>> >>> Actually I tried this and got TWO graphs. One just the grid then the >>> functions! >>> Suggestions? >>> [image: Sympy_grid.PNG] >>> >>> On Wed, Jun 26, 2019 at 3:26 AM Oscar Benjamin < >>> oscar.j.benja...@gmail.com> wrote: >>> >>>> Hi Lee, >>>> >>>> SymPy's plotting module uses matplotlib so it is reasonable to use the >>>> matplotlib API for adding a grid. >>>> >>>> I just tried this and it works fine: >>>> >>>> In [1]: plot(x**2) >>>> Out[1]: <sympy.plotting.plot.Plot at 0x7efd2fab3128> >>>> >>>> In [2]: from matplotlib.pyplot import grid >>>> >>>> In [3]: grid() >>>> >>>> Oscar >>>> >>>> On Wed, 26 Jun 2019 at 01:59, Lee Smith <leesmith...@gmail.com> wrote: >>>> > >>>> > Greetings: >>>> > >>>> > I want to display a grid in a sympy plot. >>>> > >>>> > The sympy.doc page only discusses mesh grids. >>>> > >>>> > On searching through Google, I found only one result that suggested >>>> using matplotlib.pyplot in addition to the sympy.plot(...) method. >>>> > >>>> > This should be simple and I am surprised that it is not asked more. >>>> > >>>> > Thanks in advance, >>>> > lee >>>> > >>>> > -- >>>> > You received this message because you are subscribed to the Google >>>> Groups "sympy" group. >>>> > To unsubscribe from this group and stop receiving emails from it, >>>> send an email to sympy+unsubscr...@googlegroups.com. >>>> > To post to this group, send email to sympy@googlegroups.com. >>>> > Visit this group at https://groups.google.com/group/sympy. >>>> > To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/sympy/01a492c1-f8df-4810-b413-063f65ce4fa1%40googlegroups.com >>>> . >>>> > For more options, visit https://groups.google.com/d/optout. >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "sympy" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to sympy+unsubscr...@googlegroups.com. >>>> To post to this group, send email to sympy@googlegroups.com. >>>> Visit this group at https://groups.google.com/group/sympy. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/sympy/CAHVvXxRSY%3DJ4sLs6wfePiB921ThqpYazi8MWu88mQjMtia7iJQ%40mail.gmail.com >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "sympy" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to sympy+unsubscr...@googlegroups.com. >>> To post to this group, send email to sympy@googlegroups.com. >>> Visit this group at https://groups.google.com/group/sympy. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sympy/CAJTRwDpG6dT9ELCWcUaSP6dmTOznaFHKS6LXOmXsZY%2BpM%3D9wNw%40mail.gmail.com >>> <https://groups.google.com/d/msgid/sympy/CAJTRwDpG6dT9ELCWcUaSP6dmTOznaFHKS6LXOmXsZY%2BpM%3D9wNw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sympy+unsubscr...@googlegroups.com. >> To post to this group, send email to sympy@googlegroups.com. >> Visit this group at https://groups.google.com/group/sympy. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/CAHVvXxQa5nseLq5v04U3Wz06sJnsYa9sNj_8zMPsJznSmB5mYw%40mail.gmail.com >> <https://groups.google.com/d/msgid/sympy/CAHVvXxQa5nseLq5v04U3Wz06sJnsYa9sNj_8zMPsJznSmB5mYw%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at https://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CAJTRwDpLXZVRjds0Nj0YvSHOAC3kLRpy%3D15PQfowXiOPerc3tw%40mail.gmail.com > <https://groups.google.com/d/msgid/sympy/CAJTRwDpLXZVRjds0Nj0YvSHOAC3kLRpy%3D15PQfowXiOPerc3tw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. 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