Plotting in 2D

2Dplot

asked 2020-09-05 21:38:59 +0100

Alex89
89 ●1 ●3 ●9

updated 2020-09-05 21:42:28 +0100

I have a question about the plots made by SageMath compared to other CAS.

Why does it make the straight line between the two curves? It's like Sage is plotting the vertical asymptote without the user asking for it.

It does this to all the functions in the form of 1/x. I have not seen this type of plotting in Mathematica or Desmos, which made me wonder why the difference. Thanks.

sage: f(x) = x^2/(x+1)
sage: plot(f, (x,-3,2),figsize=10, ymax=8,ymin=-8)

sage: plot(1/(x+1), (x,-3,2),figsize=10, ymax=8,ymin=-8)

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2020-09-05 22:06:16 +0100

Emmanuel Charpentier
7774 ●6 ●51 ●154

Try:

plot(1/(x+1), (x,-3,2),figsize=10, ymax=8,ymin=-8, detect_poles="True")

or (more informative) :

plot(1/(x+1), (x,-3,2),figsize=10, ymax=8,ymin=-8, detect_poles="show")

plot? is your friend...

edit flag offensive delete link

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower

Stats

Asked: 2020-09-05 21:38:59 +0100

Seen: 743 times

Last updated: Sep 05 '20

Plotting in 2D edit

1 Answer