lambda_diff | R Documentation |

If you want to test two competing hypotheses, you can use this helper function to create the correct difference lambdas. There is no magic here. The two contrasts are z-standardized first and then subtracted (lambda_preferred - lambda_competing). You can use the new difference lambdas as the input for calc_contrast.

```
lambda_diff(lambda_preferred, lambda_competing, labels = NULL)
```

`lambda_preferred` |
Lambdas of the preferred hypothesis. Has to be a named vector with the names corresponding with the groups in the analyzed data set. Alternatively, use the parameter labels. |

`lambda_competing` |
Lambdas of the competing hypothesis. Has to be a named vector with the names corresponding with the groups in the analyzed data set. Alternatively, use the parameter labels. |

`labels` |
If you provide lambdas without names, you can set the group labels for both contrasts here. |

Lambdas for difference between lambda_preferred and lambda_competing

```
lambda <- lambda_diff(c("A" = 1, "B" = 2, "C" = 3),
c("A" = 1, "B" = 2, "C" = 6))
lambda
# same result
lambda2 <- lambda_diff(c(1, 2, 3), c(1, 2, 6),
labels = c("A", "B", "C"))
lambda2
```

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