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If it is a vector then the previous code returned NULL, and therefore the if statement did not return a logical\n* Changed detc so that if if the parameter predictors is just vector it gets coerced into a matrix with one column so that it doesn't fail the assert. This seems reasonable given that the response is expected to be factor and is coerced into one if it isn't.\n* Removed the URLs from the ovarianCancer man pages because they are no longer valid and I can't find a sensible alternative. 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