# Fitted values versus residuals plot

### Description

Plots a scatter plot for the variables of the residuals and fitted values from the linear model, lmfit. A lowess smooth line for the underlying trend, as well as one standard deviation error bounds for the scatter about this trend, are added to this scatter plot. A test for a quadratic relationship between the residuals and the fitted values is also computed.

### Usage

1 | ```
residPlot(lmfit,f=0.5)
``` |

### Arguments

`lmfit` |
an lm object, i.e. the output from "lm()". |

`f` |
the smoother span. This gives the proportion of points in the plot which influence the smooth at each value. Larger values give more smoothness. |

### Value

Returns the plot.

### See Also

"trendscatter"

### Examples

1 2 3 4 |

Want to suggest features or report bugs for rdrr.io? Use the GitHub issue tracker. Vote for new features on Trello.