Below I try to answer the question (basically there is no way for the moment), but could you tell us how you actually expected this figure to look like?
There does not seem to be a satisfactory way to do it. After all DiracDelta is zero at all points besides x=0, so simple sampling will miss this point. If x=0 is actually sampled, it returns infinity which either will cause the code to crash or it will mask the point as a NaN so it will be invisible. A step forward to solving this would be to have some kind of asymptote detector that changes the scale of the plot accordingly. Another way to solve this would be to provide an appropriate api for functions to tell the plotting module that they have such degenerate points. In any case, a lot of work is necessary for the implementation of a satisfactory solution. On 28 July 2013 18:00, <[email protected]> wrote: > Here is my python notebook script > > while the last plot the ipython kernel seems to be busy all the time > > ============== > import sympy > from sympy.plotting import plot > from sympy.abc import t,tau > > u_t = 2 * DiracDelta(t) > g_t = 0.5 * ( Heaviside(t)-Heaviside(t-2) ) > > plot(g_t, (t, -5, 5)) > ============== > > plot( integrate( u_t.subs(t,tau)*g_t.subs(t,t-tau), (tau,-10, 10)), > (t,-10,10)) > plot( integrate( u_t.subs(t,tau)*u_t.subs(t,t-tau), (tau,-10, 10)), > (t,-10,10)) > plot( integrate( g_t.subs(t,tau)*g_t.subs(t,t-tau), (tau,-10, 10)), > (t,-10,10)) > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
