# polyfit

Fit a polynomial to a set of paired data.

## Syntax

p = polyfit(x,y,n)

[p,s,t] = polyfit(x,y,n)

## Inputs

`x`- Values in first dimension of paired data.
`y`- Values in second dimension of paired data.
`n`- Order of the fit.

## Outputs

- p
- The fitted polynomial coefficients, stored in descending order of powers.
- s
- A structure containing information about the fit. The following are supported.
- t
- A transform vector containing t(1)=mean(x) and
t(2)=std(x). When t is present,
`x`is shifted by t(1) and scaled by t(2) prior to the fit.

## Example

Second order polyfit example.

`p=polyfit([1,2,3,4],[4,8,18,32],2)`

```
p = [Matrix] 1 x 3
2.50000 -3.10000 4.50000
```