Re: [sage-support] Interpolation in Sage
On 07/22/2015 04:04 PM, Santanu Sarkar wrote: > Hello, >I want to find a polynomial f(x_1,x_2,x_3,x_4) explicitly > by interpolation. I know that the degree of f is 2. I have enough data > points. How can I do this in Sage? > I have some code to do this here: http://michael.orlitzky.com/git/?p=sage.d.git;a=blob;f=mjo/interpolation.py It has sage-style tests and examples. Here's a simple example interpolating something that looks like f(x) = x^3: sage: xs = [-2,-1,0,1,2] sage: ys = [-8,-1,0,1,8] sage: f = lagrange_polynomial(x, xs, ys) sage: f 1/3*(x + 2)*(x + 1)*(x - 1)*x - 1/6*(x + 2)*(x + 1)*(x - 2)*x + 1/6*(x + 2)*(x - 1)*(x - 2)*x - 1/3*(x + 1)*(x - 1)*(x - 2)*x sage: f(x = -2) -8 sage: f(x = -1) -1 sage: f(x = 0) 0 sage: f(x = 1) 1 sage: f(x = 2) 8 -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
Re: [sage-support] Interpolation in Sage
Take a look at example 75) https://sagecell.sagemath.org/?q=zeplgw HTH, AJG -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Interpolation in Sage
Hello, I want to find a polynomial f(x_1,x_2,x_3,x_4) explicitly by interpolation. I know that the degree of f is 2. I have enough data points. How can I do this in Sage? -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
