# hougen

Hougen-Watson model

## Syntax

```yhat = hougen(beta,x) ```

## Description

`yhat = hougen(beta,x) ` returns the predicted values of the reaction rate, `yhat`, as a function of the vector of parameters, `beta`, and the matrix of data, `X`. `beta` must have 5 elements and `X` must have three columns.

`hougen` is a utility function for `rsmdemo`.

The model form is:

`$\stackrel{^}{y}=\frac{{\beta }_{1}{x}_{2}-{x}_{3}/{\beta }_{5}}{1+{\beta }_{2}{x}_{1}+{\beta }_{3}{x}_{2}+{\beta }_{4}{x}_{3}}$`

## References

[1] Bates, D. M., and D. G. Watts. Nonlinear Regression Analysis and Its Applications. Hoboken, NJ: John Wiley & Sons, Inc., 1988.

## Version History

Introduced before R2006a