Custom Prior Probabilities
Use this text field to specify the assumed prior probabilities for each of the classes.
Values must be entered using the following syntax:
level1=0.X level2=0.Y ... leveln=0.Z
where:
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level1 through leveln are the names of all of the levels of the dependent variable, |
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0.X, 0.Y ... 0.Z, represent the prior probability of each level and are numbers between 0.0 and 1.0, |
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if the level is numeric or contains special characters, that level must be enclosed within single quotation marks (for example, ‘1’=0.2), |
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individual levels are delimited by a space, |
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The prior probabilities should sum to one (1.0). If they do not, all values are rescaled such that they do sum to one (1.0). |
To Specify the Custom Prior Probabilities:
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Choose Automated as the Mode for generating the model. |
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Type the classes to be modeled and their probabilities as described above. |
For example, if the class variable has three levels A, B, and C, with prior probabilities of 0.2, 0.2, and 0.6, respectively, then specify A=0.2 B=0.2 C=0.6, as shown below:
