Plots quantiles obtained from a quantile regression forest.
Additionally insets the continuous rank probability score (crps), a
useful diagnostic of accuracy.

```
plot.quantreg(x, prbL = .25, prbU = .75,
m.target = NULL, crps = TRUE, subset = NULL, ...)
```

## Arguments

- x
A quantile regression object obtained from calling `quantreg`

.

- prbL
Lower quantile (preferably < .5).

- prbU
Upper quantile (preferably > .5).

- m.target
Character value for multivariate families
specifying the target outcome to be used. If left unspecified, the
algorithm will choose a default target.

- crps
Calculate crps and inset it?

- subset
Restricts plotted values to a subset of the data.
Default is to use the entire data.

- ...
Further arguments passed to or from other methods.

## Author

Hemant Ishwaran and Udaya B. Kogalur