Timeline for Fit implicit function
Current License: CC BY-SA 3.0
18 events
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| Apr 13, 2017 at 12:55 | history | edited | CommunityBot |
replaced http://mathematica.stackexchange.com/ with https://mathematica.stackexchange.com/
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| Jun 22, 2013 at 11:22 | vote | accept | dreichler | ||
| Jun 21, 2013 at 8:42 | answer | added | Ray Koopman | timeline score: 3 | |
| Jun 20, 2013 at 10:29 | comment | added | dreichler | I just understood your answer.You're totally right. You implemented a least square fit with almost no code. Really nice:) What do I excactly get with NMinValue of this expression? Really the sum of the squares? | |
| Jun 20, 2013 at 10:15 | comment | added | J. M.'s missing motivation♦ | That's essentially what I did in my answer to the other question... | |
| Jun 20, 2013 at 10:11 | comment | added | dreichler | Thank you very much. It works. To obtain something like $\chi^2$ i must implement the sum of squares myself, don't I? | |
| Jun 20, 2013 at 9:58 | comment | added | J. M.'s missing motivation♦ |
If you're fitting ellipses to data, you might be interested to know that there are special methods like this... but to start you off: NArgMin[{Norm[Function[{x, y}, a x^2 + 2 b x y + c y^2 - e] @@@ pts], b^2 - a c == -1}, {a, b, c, e}].
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| Jun 20, 2013 at 9:52 | comment | added | dreichler | I tried a graphical fit with a manipulate i get roughly a=-0.04, b=-0.97 and d=-0.17 | |
| Jun 20, 2013 at 9:46 | history | edited | dreichler | CC BY-SA 3.0 |
included data
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| Jun 20, 2013 at 9:35 | comment | added | J. M.'s missing motivation♦ |
Okay, but you still need to include pts somewhere, as the rest of us don't have it... on another note, you wouldn't happen to have initial guesses for your parameters, no?
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| Jun 20, 2013 at 9:34 | comment | added | dreichler | I have modified the question, now it shouldn't be a duplicate anymore | |
| Jun 20, 2013 at 9:33 | history | reopened | J. M.'s missing motivation♦ | ||
| Jun 20, 2013 at 9:31 | history | edited | dreichler | CC BY-SA 3.0 |
made changes so it's no duplicate anymore
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| Jun 20, 2013 at 0:07 | history | closed | J. M.'s missing motivation♦ | exact duplicate | |
| Jun 19, 2013 at 21:08 | review | First posts | |||
| Jun 20, 2013 at 0:10 | |||||
| Jun 19, 2013 at 20:58 | comment | added | PlatoManiac | Search the website before asking your question. Here is an example mathematica.stackexchange.com/questions/10089/… . Hope it helps! | |
| Jun 19, 2013 at 20:56 | history | edited | PlatoManiac | CC BY-SA 3.0 |
added 17 characters in body
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| Jun 19, 2013 at 20:49 | history | asked | dreichler | CC BY-SA 3.0 |