## S3 method for class 'summary.lm':
fortify(model, data = NULL, level = 0.95, ...)## S3 method for class 'summary.glm':
fortify(model, data = NULL, level = 0.95, ...)
## S3 method for class 'TukeyHSD':
fortify(model, data, ...)
## S3 method for class 'TukeyHSD':
fortify(model, data, ...)
fortify(TukeyHSD(lm(age ~ substance, data=HELPrct)))
fortify(TukeyHSD(lm(age ~ substance, data=HELPrct)))
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