Interface PairwiseWilcoxTestOptions

Alternative hypothesis for each comparison of row group against column group. Default "two.sided".

Confidence level of the interval. Default 0.95.

Continuity correction of the normal approximation. Default true. As in R 4.6, also 0 (the same as true) or 1, 2, 3: the continuity correction plus that many Edgeworth terms in the p-value (only without ties and zero differences; with them, the continuity correction only). The interval and estimate use the continuity correction alone. Any other number throws.

Compute an exact p-value (and interval). Default null: exact when the sample size is below 50 (both samples, for two samples; zero differences count). With ties or zero differences the exact test is the conditional (permutation) test given the mid-ranks, as in R 4.6; the signed rank test then ranks the zeros with the other differences and leaves them out of the permutation distribution (Pratt).

The conditional distribution is built once for the p-value and again for each multiset of scores that the interval's search meets. Where that would take more than about 8 seconds, a RangeError suggesting exact: false is thrown before the computation. Measured on a Mac mini (Apple M1, Node 24) with data rounded to one or two decimals: the p-value up to about n = 2400 (one sample) and m = n = 320 (two samples); the interval up to about n = 150 to 300 (one sample; 4 s at n = 150 with 3 decimals, 4.6 s at n = 300 with 1) and m = n = 80 (two samples; 49 x 49 takes 3 s). Ties in few places (or none) cost less.

Location under the null hypothesis (location shift for two samples). Default 0.

p-value adjustment (see pAdjust). Default "holm".

Paired test (signed rank test on x - y). Requires y. Default false.

Tolerance of the root search for the interval and estimate in the normal approximation (R's tol.root). Default 1e-4.