show confidence and prediction bands on plots

```
panel.lmbands(
x,
y,
interval = "confidence",
level = 0.95,
model = lm(y ~ x),
band.col = c(conf = slcol[3], pred = slcol[2]),
band.lty = c(conf = slty[3], pred = slty[2]),
band.show = TRUE,
fit.show = TRUE,
band.alpha = 0.6,
band.lwd = 1,
npts = 100,
...
)
```

## Arguments

- x, y
numeric vectors

- interval
a vector subset of `'confidence'`

and `'prediction'`

- level
confidence level

- model
model to be used for generating bands

- band.col
a vector of length 1 or 2 giving the color of bands

- band.lty
a vector of length 1 or 2 giving the line type for bands

- band.show
logical vector of length 1 or 2 indicating whether
confidence and prediction bands should be shown

- fit.show
logical indicating whether the model fit should be shown

- band.alpha
a vector of length 1 or 2 alpha level for bands

- band.lwd
a vector of length 1 or 2 giving line width for bands

- npts
resolution parameter for bands (increase to get better resolution)

- ...
additional arguments