To obtain the minimum elevation angles in flight direction shown in Fig. 2, all observations with azimuth angles between 350° and 10° are used, while the aft direction contains all observations between 170° and 190°.
The Gini index is a measure of variability computed for each node in a decision tree, and will be 0 for a node that contains all observations assigned to same group (i.e., MHC type).
Starting from the root node containing all observations, each tree recursively splits observations into more homogeneous subsets.
Starting from the root node containing all observations each split allocates them into mutually exclusive subsets (decision nodes) until a node has no further splits, resulting in terminal nodes (see Figure 2).
These successive clustering operations produced a binary clustering tree (dendrogram), whose roots contained all the observations.
Given these new expectations, the maximum possible χ2 value will be when the group with the "nk" expectation (the larger expectation) contains 0 observations and the other group (the smaller expectation) contains all n observations.
Define an N x 1 vector "y," with N = IJK that contains all the observations sorted by trait within environment for each population.
For example, using the first set, the data can be divided so that the training set contains all the observations in { S2,...,S k }, and the testing set those in S1.
Another major goal of the comparative biology stream was to have student teams create an electronic notebook containing all of their observations of the ten animals.
3 This is a reasonable hypothesis since the smoothing lag should be selected to account for, at least, the observations containing all the energy of the symbols transmitted at time t.
