Calling function that call functions

#1 Posted: 2019/4/2 09:34:25

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Hi. I can't call a function which uses a call for functions too. How to solve that? Example in the attached.

function_1v.sm (17.56 KiB) downloaded 1068 time(s).

Best regards.
Alvaro.

#2 Posted: 2019/4/2 10:09:35

Martin Kraska

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I guess f(a) isn't recognized as a function in the call df(f(a)...) as f(a) evaluates to a number, not a function. Use df(f(x)... instead, with x being something undefined.

Technische Mechanik mit SMath Studio: https://link.springer.com/book/10.1007/978-3-658-50592-9

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Alvaro 2019/4/2 10:14:00

#3 Posted: 2019/4/2 10:13:54

Alvaro

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Hi Martin. You're right! Thanks.
Best regards.
Alvaro.

#4 Posted: 2019/4/2 10:50:57

Alvaro

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Hi. Again, here ... how to solve this other?

bound_ode.sm (16.89 KiB) downloaded 1057 time(s).

Thanks in advanced
Alvaro.

#5 Posted: 2019/4/2 11:11:12

Jean Giraud

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Wrote
Hi. I can't call a function which uses a call for functions too. How to solve that?

Hola Alvaro,
I understand what you are attempting, sorry: can't doctor quick.
IMHO, a better approach would be the coding of the Mathcad
numerical derivative, which returns as scalar as well.
The beginning of the code was given Mathcad 8 Pro.
It is in fact more advanced than the rough Newton as proposed.
If you are willing: I can retrieve this code.

Buenos dias ... Jean

Derivative erf(x).sm (6.5 KiB) downloaded 1057 time(s).

#6 Posted: 2019/4/2 11:24:38

Jean Giraud

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... Ridder numerical derivative code.

Unsolved Ridder Deriv.sm (42.55 KiB) downloaded 1064 time(s).

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