I am working on Mixed-species flocks. Therefore, I have to analyze association between two species at once. I have to calculate Cole's(1949) coefficient of association between two species. Is there a software to calculate this formula?
Cole, L. C. (1949). The measurement of Interspecific associaton. Ecology, 30(4), 411-424.
Hello, to study a relationship between categorical variables we can rely on the examination of the appropriate percentages. To summarize and measure the strength of a relationship, we can use Association coefficients.
An association coefficient or correlation coefficient is an index of how strong a relationship between two variables is; a value of 0 indicates no relationship, whereas a value of, normally, 1 represents the maximum (a few coefficients have a maximum lower than 1, some can exceed 1 in particular conditions). Coefficients meant for ordinal or higher levels of measurement are signed to indicate a positive or negative association (direction of the relationship).
There is a large number of association coefficients; they differ for two reasons:
Measurement level requirements: there are nominal coefficients, ordinal coefficients etc.
Statistical approach: There are several types based on different statistical ideas, for instance there is a family derived from the χ^2 statistic.
For more info see attached paper.
Good luck.!
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