# Constant fit of coefficients in a TPR model

### Description

Weighted least square estimate of a constant model for time-varying coefficients in a TPR model.

### Usage

1 | ```
cst.fit.ff(fit, idx)
``` |

### Arguments

`fit` |
a fitted object from |

`idx` |
the index of the |

### Value

The estimated constant fit, standard error, z-value and p-value.

### Author(s)

Jun Yan jyan@stat.uconn.edu

### References

Fine, Yan, and Kosorok (2004). Temporal Process Regression. Biometrika.

### See Also

`tpr.test `