This vignette reports the SPSS-compatibility status of every statistical function in mariposa. It is auto-generated from the test suite and the validation exception registry.
Generated: 2026-09-30
Every numerical comparison between an R-side value and an SPSS reference falls into one of four tiers (Charter §4):
VALIDATION_EXCEPTIONS.mdThe columns show how many SPSS reference values per tier the
validation file checks when it runs. “Total” is the total number of
charter-compliant comparisons. The w_* functions share one
validation file, whose total each of them shows.
The “Internal (Tier 4)” column flags statistics that have no SPSS
reference and are therefore R-only: for the rank-based family the
weighted variant (SPSS NPAR TESTS and
NONPAR CORR ignore WEIGHT BY); for
reliability, McDonald’s omega in all paths (IBM does not
publicly document the SPSS omega algorithm; an SPSS v29 reference run is
pending). Tier-4 statistics are covered by internal regression and
cross-check tests plus a weights-equal-1 invariance suite instead of
SPSS references. (mann_whitney’s weighted variant is a
design-based rank test additionally validated against
survey::svyranktest().) All other statistics of these
functions are SPSS-validated as shown in the tier columns.
| Function | Status | Spec | Display | Exception | Total | Internal (Tier 4) |
|---|---|---|---|---|---|---|
ancova |
compliant | 147 | 653 | 0 | 800 | — |
binomial_test |
compliant | 24 | 34 | 0 | 58 | weighted variant |
center |
not validated | — | — | — | — | — |
chi_square |
compliant | 53 | 182 | 0 | 235 | — |
chisq_gof |
compliant | 51 | 82 | 0 | 133 | — |
codebook |
not validated | — | — | — | — | — |
cramers_v |
not validated | — | — | — | — | — |
crosstab |
compliant | 1419 | 1950 | 0 | 3369 | adjusted standardized residuals (Haberman-formula oracle; SPSS /CELLS=ASRESID reference run pending) |
describe |
compliant | 18 | 270 | 0 | 288 | — |
dunn_test |
compliant | 0 | 6 | 0 | 6 | weighted variant |
efa |
compliant | 21 | 473 | 84 | 578 | — |
factorial_anova |
compliant | 200 | 409 | 0 | 609 | — |
fisher_test |
compliant | 100 | 312 | 0 | 412 | — |
frequency |
compliant | 24 | 126 | 0 | 150 | — |
friedman_test |
compliant | 18 | 38 | 0 | 56 | weighted variant |
goodman_gamma |
not validated | — | — | — | — | — |
kendall_tau |
compliant | 100 | 102 | 0 | 202 | weighted variant |
kruskal_wallis |
compliant | 52 | 45 | 0 | 97 | weighted variant |
levene_test |
compliant | 0 | 144 | 0 | 144 | — |
linear_regression |
compliant | 35 | 567 | 0 | 602 | — |
logistic_regression |
compliant | 12 | 17 | 0 | 29 | all statistics (textbook-formula oracle; no SPSS v29 reference run yet) |
mann_whitney |
compliant | 19 | 74 | 0 | 93 | weighted variant |
mcnemar_test |
compliant | 84 | 59 | 0 | 143 | — |
multiple_response |
compliant | 19 | 33 | 0 | 52 | all statistics (hand-computation oracle; SPSS MULT RESPONSE reference run pending) |
normality_test |
compliant | 6 | 15 | 0 | 21 | all statistics (independent-implementation oracles; SPSS EXAMINE reference run pending) |
oneway_anova |
compliant | 234 | 1209 | 0 | 1443 | — |
pairwise_wilcoxon |
compliant | 106 | 136 | 0 | 242 | weighted variant |
partial_cor |
compliant | 4 | 16 | 0 | 20 | all statistics (residual-regression oracle; SPSS PARTIAL CORR reference run pending) |
pearson_cor |
compliant | 18 | 55 | 0 | 73 | — |
phi |
not validated | — | — | — | — | — |
pomps |
not validated | — | — | — | — | — |
rec |
not validated | — | — | — | — | — |
reliability |
compliant | 45 | 413 | 0 | 458 | McDonald’s omega (all paths) |
row_count |
not validated | — | — | — | — | — |
row_means |
not validated | — | — | — | — | — |
row_sums |
not validated | — | — | — | — | — |
scheffe_test |
compliant | 0 | 1422 | 0 | 1422 | — |
spearman_rho |
compliant | 118 | 120 | 0 | 238 | — |
std |
not validated | — | — | — | — | — |
t_test |
compliant | 9 | 664 | 0 | 673 | — |
tukey_test |
compliant | 0 | 1418 | 0 | 1418 | — |
w_iqr |
compliant | 132 | 312 | 0 | 444 | — |
w_kurtosis |
compliant | 132 | 312 | 0 | 444 | — |
w_mean |
compliant | 132 | 312 | 0 | 444 | — |
w_median |
compliant | 132 | 312 | 0 | 444 | — |
w_modus |
compliant | 132 | 312 | 0 | 444 | — |
w_quantile |
compliant | 132 | 312 | 0 | 444 | — |
w_range |
compliant | 132 | 312 | 0 | 444 | — |
w_sd |
compliant | 132 | 312 | 0 | 444 | — |
w_se |
compliant | 132 | 312 | 0 | 444 | — |
w_skew |
compliant | 132 | 312 | 0 | 444 | — |
w_var |
compliant | 132 | 312 | 0 | 444 | — |
wilcoxon_test |
compliant | 48 | 66 | 0 | 114 | weighted variant |
| ID | Function | Statistic | Tolerance | Reason |
|---|---|---|---|---|
| EXC-001 | efa |
ML loadings, sums of squares, % of variance | 0.002 | SPSS stops the ML iteration at its convergence criterion (.001); mariposa iterates to the optimum. |
| EXC-002 | efa |
ML communalities / SS where SPSS did not converge | 0.05 | The SPSS reference runs end without convergence (3 factors from 6 items, df = 0, Heywood cases). |
An exception covers an identified algorithmic difference to SPSS, not a bug: its tolerance is what the two algorithms agree to. Statistics outside an exception are asserted at Spec or Display tier, or are listed as Internal (Tier 4) in the table above.
The following functions are in SPSS-validation scope (per Charter §9)
but do not yet have a test-<fn>-spss-validation.R
file:
centercodebookcramers_vgoodman_gammaphipompsrecrow_countrow_meansrow_sumsstdA function is SPSS-compatible when:
NA placeholders in its
spss_values blockFunctions with non-zero Legacy counts are mid-migration and not yet Charter-compliant; their assertions may pass but do not yet enforce the documented tolerance policy.
All validation runs SPSS v29 syntax scripts in
tests/spss_reference/syntax/ against
tests/spss_reference/data/, saves the output to
tests/spss_reference/outputs/, and asserts the R-side
computation matches via assert_spss() from the validation
helpers in tests/testthat/. Inline cached values in test
files cite their source line via trailing
# <output_file>:<line> comments; the dev-only
script tests/spss_reference/verify_inline.R audits this
citation chain before every release.