使用期限*
许可形式单机版
原产地美国
介质下载
适用平台Windows
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New Matrix Format
Categorical values can now be either numerical or text with a maximum of 20 characters
Blocked Indicator Species Analysis
Dufrêne and Legendre’s (1997) method for Indicator Species Analysis can be adapted to a randomized block experiment or a paired-sample design. The data are pre-relativized by species within blocks (or pairs), such that the sum across groups equals one for each block. If a species is absent from a block, the abundances are maintained at zero. The relativization alters the relative abundance portion of the Indicator Value (IV) index to focus on within block differences. Then the ISA is run as usual. The randomization test differs from regular ISA in that instead of an unconstrained permutation of group identifiers, groups are randomly permuted within blocks.
* Flexible Menu-driven parameter setup options allowing appropriately tailored analyses
* NMS (NMDS) features Built-in randomization test, real-time stress plots
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