Where is the ellipticf function?

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Roy Goodman 2017 年 8 月 4 日

According to this MathWorks website:
https://www.mathworks.com/help/symbolic/ellipticf.html
Matlab has an incomplete elliptic integral function.
It doesn't seem to exist in my copy, running 2017a, with symbolic toolbox installed. The website doesn't seem to indicate that this function requires any non-standard toolbox except possibly symbolic math. What gives?

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採用された回答

Star Strider 2017 年 8 月 4 日
It’s there, and will respond if you call it correctly.
MATLAB is case-sensitive:
s = [ellipticF(pi/3, -10.5), ellipticF(pi/4, -pi),...
ellipticF(1, -1), ellipticF(pi/2, 0)]
s =
618.4459e-003 648.5970e-003 896.3938e-003 1.5708e+000
while:
s = [ellipticf(pi/3, -10.5), ellipticF(pi/4, -pi),...
ellipticF(1, -1), ellipticF(pi/2, 0)]
Cannot find an exact (case-sensitive) match for 'ellipticf'
The closest match is: ellipticF in C:\Program
Files\MATLAB\R2017a\toolbox\symbolic\symbolic\@double\ellipticF.m
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Star Strider 2017 年 8 月 4 日
My pleasure.
Interesting about lookfor. I’ll bring this thread to the attention of MathWorks so they can look into it.

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