Description Usage Arguments Author(s) Examples
Constructs a spread versus level plot and displays a resistant fit.
| 1 | spread.level.plot(response,group)
 | 
| response | numeric vector of response values | 
| group | vector of values of the grouping variable | 
Jim Albert
| 1 2 | data(state)
spread.level.plot(state.x77[,"Area"],state.region)
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