Description Usage Arguments Value See Also

The function `getX`

is used to get the matrix of covariates for the regression based on a specified polynomial order.

1 | ```
getX(samples, derivatives, polyorder)
``` |

`samples` |
An |

`derivatives` |
An |

`polyorder` |
The order of the polynomial. |

The design matrix for the regression (except for the column of 1's for the intercept).

`Phi_fn`

for a very similar function for use in semi-exact control functionals. The function `Phi_fn`

essentially gets the same matrix but with a column of ones added.

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