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var_grid(), dig_grid() - allow to specify xvars only and then make all combinations of them
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dig_baseline_contrasts()
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dig_conditional_contrasts()
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dig_level_contrasts()
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dig_post_hoc_contrasts()
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dig_paired_baseline_contrasts()
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dig_paired_conditional_contrasts()
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dig_paired_level_contrasts()
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dig_paired_post_hoc_contrasts()
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dig_correlations()
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dig_correlation_contrasts()