Problem with code from Stan Wagon's book

Question

Stan Wagon's Third Edition of Mathematica in Action has this code on page 30:

Manipulate[
  Plot[Sin[x], {x, 0, Pi},
    Method -> {Refinement -> {ControlValue -> (90 - n °)}},
    Mesh -> All,
    MeshStyle -> {Red, PointSize[Large]},
    PlotPoints -> 8],
  {n, 0, 90, 2}]

It does not work. Are Refinement and ControlValue options of the past for Mathematica?

Is there a workaround for this code?

The Cure

Manipulate[
 Plot[Sin[x], {x, 0, Pi},
  Method -> {Refinement -> {ControlValue -> (90 - n) \[Degree]}},
  Mesh -> All,
  MeshStyle -> {Red, PointSize[Large]},
  PlotPoints -> 8],
 {n, 0, 90, 2}
 ]

Folks are correct, the degree symbol was misplaced. However, my real question here is why do Refinement and ControlValue have blue rather than black coloring in my notebook, and why can I not find them in the documentation?

Where I can find the CD version of Stan Wagon - “Mathematica in action” 3rd ed. book? — , Jul 25 '15 at 18:47
(90 -n Degree) looks suspicious. The first part is quite probably supposed to be an angle in degrees (but it isn't now), the second part is in radians. My guess is that it should be (90-n)Degree. — Sjoerd C. de Vries, Jul 25 '15 at 22:06

score 4 · Answer 1 · edited Jul 25 '15 at 23:10

4

David, replace

Method -> {Refinement -> {ControlValue -> (90 - n °)}}

with

Method -> {Refinement -> {ControlValue -> (90 - n) °}}`

edited Jul 25 '15 at 23:10

m_goldberg

107,779
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answered Jul 25 '15 at 20:28

More detail would be helpful – bbgodfrey Jul 25 '15 at 20:41
@bbgodfrey Misplaced parenthesis in OP's code. See my comment above. – Sjoerd C. de Vries Jul 25 '15 at 22:11
@Willinski . Yes, that is definitely a mistake, but my real question here is why do Refinement and ControlValue remain in blue, and why can I not find them in the documentation? – David Jul 26 '15 at 00:53
@David, MaxBend used to be documented, but stopped being documented since version 6 IIRC. – J. M.'s missing motivation Jul 26 '15 at 01:14

Problem with code from Stan Wagon's book

1 Answers1