spline - SMath

#1 Pubblicato: 26/09/2024 13:41:44

Valery Ochkov

67 apprezzamenti in 713 post.

Gruppo: User

See please the attach!
Wath is it with spline?
Spline-Mad.sm (999,43 KiB) scaricato 1669 volta(e).

#2 Pubblicato: 27/09/2024 02:59:30

Martin Kraska

1.361 apprezzamenti in 2.275 post.

Gruppo: Moderator

I think this is because lspline() requires equidistant x values and your's aren't.

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

1 utenti hanno apprezzato questo post

Valery Ochkov 27/09/2024 13:31:00

#3 Pubblicato: 27/09/2024 13:35:18

Valery Ochkov

67 apprezzamenti in 713 post.

Gruppo: User

Wrote
I think this is because lspline() requires equidistant x values and your's aren't.

Thank you!
Yes, that's true. But I think it's a bug.
The values should only be sorted in ascending order X!
There is no such bug in Mathcad.
Spline-bug.sm (12,33 KiB) scaricato 1620 volta(e).

#4 Pubblicato: 29/09/2024 22:42:01

Martin Kraska

1.361 apprezzamenti in 2.275 post.

Gruppo: Moderator

Wrote

Wrote
I think this is because lspline() requires equidistant x values and your's aren't.

Thank you!
Yes, that's true. But I think it's a bug.
The values should only be sorted in ascending order X!
There is no such bug in Mathcad.
Spline-bug.sm (12,33 KiB) scaricato 1620 volta(e).

I'd not call it a bug. It is just a helper function of the Mathcad Toolbox Toolbox plugin, not meant being a full-featured multipurpose function. Yet, this restriction would be worth mentioning in the help text.

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

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