2020-11-23 10:18:57 +0200 received badge ● Scholar (source) 2020-11-23 10:18:53 +0200 received badge ● Supporter (source) 2020-11-23 10:18:50 +0200 commented answer Plot ratio of Bessel functions Thank you! What was confusing me was the scale of the output graph, with the y-axis apparently between 0.0 and 5.0 (no clues about the e6 part in the image). Now it works correctly setting an appropriate ymin and ymax as you suggested. 2020-11-23 00:57:15 +0200 received badge ● Student (source) 2020-11-23 00:30:49 +0200 asked a question Plot ratio of Bessel functions I am new to SageMath and to this page. I'm running this version: SageMath version 9.2, Release Date: 2020-10-24 Using Python 3.8.5. I tried to plot the ratio of two functions related to Bessel functions. First I defined f as the first derivative of bessel_J(1, x) and gas x*bessel_J(1, x): f(x) = bessel_J(1, x) g = derivative(f, x)  Then I defined h as their ratio: h = g / (x*f)  Then, I tried to plot h with: plot(h, (x, 0, 10))  The result is an empty plot, showing only the x, y axes, and this is not correct. Am I doing something wrong? Is it possible to plot such a function and, if yes, how?