Each row of the data set is a set of 90 measurements at a river in some place in Europe. There are 11 predictors. The response is the logarithm of the abundance of a certain class of algae. Description: The columns are: 1. season, categorical (1,2,3,4 for winter, spring, summer and autumn) 2. river size (categorical) (1,2,3 for small, medium and large) 3. fluid velocity (categorical) (1,2,3 for low, medium and high) 4-11 (numerci): content of nitrogen in the form of nitrates, nitrites and ammonia, and other chemical compounds. Col. 12 ia the response: abundance of a type of algae (type 6 in the complete file). For simplicity we deleted the rows with missing values and took the logarithm of the response.
data(algae)An object of class "data.frame".
Format 90 rows, 12 columns (3 categorical, 9 numeric)
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