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**gourish****Member**- Registered: 2013-05-28
- Posts: 153

hmm... so what's the need for using the interpolation formula..i have enough data to plug into the cubic myself and find the answer... it's really to unnecessary formula don't you think so?

"The man was just too bored so he invented maths for fun"

-some wise guy

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,365

I do not like or use the Lagrange formula. In keeping with the teakettle principle I use simultaneous equations for interpolation. Mathematica uses it in its Interpolating polynomial command and I do not know why.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**gourish****Member**- Registered: 2013-05-28
- Posts: 153

the formula needs a bit unnecessary thing if we can just the use cubic to plug in the given data and find the answer don't you think?

"The man was just too bored so he invented maths for fun"

-some wise guy

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 104,365

There are always more than one way to solve a problem. Lagrange lived in an era where the solution of simultaneous equations was very difficult.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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