Can I use D[] inside of Plot[]?

Asked May 29 '20 at 14:01

Active May 29 '20 at 14:01

Viewed 26 times

I wanted to make a plot like this:

Plot[-BesselJ[1, z]*Evaluate[D[BesselJ[1, z], {z, 2}]], {z, 0, 5}]

but I got an error. However, when I tried this:

Plot[Evaluate[-BesselJ[1, z]*D[BesselJ[1, z], {z, 2}]], {z, 0, 5}]

it worked. Can someone explain it to me?

asked May 29 '20 at 14:01

Terence Li

1

Have you seen this and this? – J. M.'s missing motivation May 29 '20 at 14:05
2

Evaluate >> Details : "Evaluate only overrides HoldFirst etc. attributes when it appears directly as the head of the function argument that would otherwise be held" – kglr May 29 '20 at 14:07

0 Answers0