11 questions linked to/from Get polynomial interpolation formula
185 views

### How do I get Mathematica to write the coefficients of polynomial as fractions rather than decimal expansions? [duplicate]

I am trying to have Mathematica find the polynomial of degree $n$ in a single variable which fits the given points $(x_1,y_1),\dots, (x_{n+1},y_{n+1})$. In the examples I am concerned with, the ...
448 views

### A parabola by three points. Interpolation and Plotting [duplicate]

I would like to plot this simple line graph and generate a polynomial equation using Mathematica. Please help values ...
37 views

### Determine Functions Given Data Points [duplicate]

Is it possible for Mathematica to solve for f(x,y) = 0 such that {x,y} contains {{0,0.5}, {1,0.5}, {0.6,0.8}, {0.4,0.2}} ? Do we need to specify f(x,y) first ? ...
186k views

### xkcd-style Plots

I received an email to which I wanted to respond with a xkcd-style graph, but I couldn't manage it. Everything I drew looked perfect, and I don't have enough command over ...
11k views

### What does the construct f[x_] := f[x] = … mean?

This question mentions "x := x = trickery". What does defining a function as f[x_] := f[x] = ... do and what is it good for?
756 views

### Generating a polynomial that's accurate to within an error of no more than 1/10^5

I'm currently stuck on a question for class that asks... "Find a polynomial p[x] that you can use to calculate 6 ArcTan[x] to ...
1k views

### Why does Expand not work within a function?

I'm writing this fairly simple function: ...
347 views

### Selecting points in list that are inside a contour [duplicate]

I have a list of points which form a closed (connected) contour or path in two dimensions. I would like to get all points from a second list which satisfy the requirement that they are inside the ...
324 views

### Fitting in Mathematica: Which function? [closed]

in other programs, there is a possibility to take a data set and to find the function which fits best. Is there also such a possibility in Mathematica? I only could find ...