Linked Questions

0
votes
1answer
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 ...
0
votes
0answers
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 ...
1
vote
0answers
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 ? ...
610
votes
6answers
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 ...
89
votes
5answers
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?
8
votes
4answers
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 ...
7
votes
2answers
1k views

Why does Expand not work within a function?

I'm writing this fairly simple function: ...
2
votes
2answers
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 ...
1
vote
0answers
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 ...
0
votes
1answer
153 views

Finding the equation of curve? [closed]

I am not sure which level cure it will be, what I have is domain and range for it which are as follows. ...
1
vote
1answer
54 views

Finding a polynomial fit to a set of data [closed]

I am trying to find a polynomial to fit the data listed as data = {{0,6.67},{6,17.33},{10,42.67},{13,37.33},{17,30.10},{20,29.31},{28,28.74}} I set this string ...