If "HARVTEST V1.4" refers to a different utility, it may be confused with: Harvest: Time Tracking Software With Invoicing
It is frequently used alongside other diagnostic tools like the Breusch-Pagan test (for heteroskedasticity) and the Durbin-Watson test (for autocorrelation). Related "Harvest" Software
The test returns an htest object containing the t-statistic , the p-value , and the degrees of freedom .
The test is used to determine if the relationship between variables in a linear regression model is truly linear or if it is instead convex or concave.
When utilizing this test within a regression diagnostic workflow, the following parameters and outputs are typical: formula : A symbolic description of the model to be tested.