at function in SMath

#1 Опубликовано: 07.06.2023 11:25:18

NDTM Amarasekera

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Hello!
What is the advantage of at function in SMath ?
Appreciate if any useful example is provided.
Cheers !

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

#2 Опубликовано: 07.06.2023 12:34:30

Alvaro Diaz Falconi

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Hi Amarasekera, a pleasure to greet you. I'm sure others in this forum will be able to give very good examples, I would just like to add that the 'at' function is more or less similar to the 'eval' in maple, although it also has a 'subs' function, and even another one like 'algsubs', or Mathematica's f /. x -> a notation, and perhaps there you can see how those programs use it and get a better idea of what it might be useful for. I also remember that den derive, which did not have a function like at, could be used instead ... take the limit: lim f for x -> a

Best regards.
Alvaro.

#3 Опубликовано: 07.06.2023 14:01:37

NDTM Amarasekera

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Wrote
Hi Amarasekera, a pleasure to greet you. I'm sure others in this forum will be able to give very good examples, I would just like to add that the 'at' function is more or less similar to the 'eval' in maple, although it also has a 'subs' function, and even another one like 'algsubs', or Mathematica's [b]f /. x -

Hi Alvaro, thank you very much for your kind sentiments and valuable clarifications.

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

#4 Опубликовано: 07.06.2023 15:19:06

Martin Kraska

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Handbook page for at() and Solve(). at() is a convenient alternative for Assign(), which creates assignments based on equations (as returned by Solve, ODE2 or Fit())

at.sm (22 КиБ) скачан 162 раз(а).

_Solve.sm (33 КиБ) скачан 170 раз(а).

2023-06-07 20_12_17-SMath Solver - [_Solve.sm_].png

Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx

#5 Опубликовано: 07.06.2023 16:48:46

Jean Giraud

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Some demo application.
Take care ... Jean.

Solve at(2), at(3).sm (30 КиБ) скачан 161 раз(а).

#6 Опубликовано: 07.06.2023 18:04:21

Jean Giraud

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Electron function added Φ(x,y)
This function has no symbolic solution.
It plots X_Y but for QuickPlot, you need solving.
Cheers ... Jean.

Solve at(2), at(3).sm (47 КиБ) скачан 157 раз(а).

#7 Опубликовано: 07.06.2023 23:33:01

NDTM Amarasekera

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Hi,
Thank you all for the clarifications and examples

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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