# Documentation

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# unmkpp

Piecewise polynomial details

## Syntax

`[breaks,coefs,l,k,d] = unmkpp(pp)`

## Description

`[breaks,coefs,l,k,d] = unmkpp(pp)` extracts, from the piecewise polynomial `pp`, its breaks `breaks`, coefficients `coefs`, number of pieces `l`, order `k`, and dimension `d` of its target. Create `pp` using `spline` or the spline utility `mkpp`.

## Examples

This example creates a description of the quadratic polynomial

`$\frac{-{x}^{2}}{4}+x$`

as a piecewise polynomial `pp`, then extracts the details of that description.

```pp = mkpp([-8 -4],[-1/4 1 0]); [breaks,coefs,l,k,d] = unmkpp(pp) breaks = -8 -4 coefs = -0.2500 1.0000 0 l = 1 k = 3 d = 1```

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