October 2017
Beginner to intermediate
572 pages
26h 1m
English
book
Machine Learning with R Cookbook - Second Edition
by AshishSingh Bhatia, Yu-Wei, Chiu (David Chiu)
Content preview from Machine Learning with R Cookbook - Second Edition
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How to do it...
Perform the following steps to use the Cox proportional hazards regression model:
- The Cox proportional hazard model is good for most cases and its syntax looks much like lm and glm functions.
> coxph(formula=Surv(time, status)~sex, data=cancer) Output Call: coxph(formula = Surv(time, status) ~ sex, data = cancer) coef exp(coef) se(coef) z p sex -0.531 0.588 0.167 -3.18 0.0015 Likelihood ratio test=10.6 on 1 df, p=0.00111 n= 228, number of events= 165 > coxph(formula=Surv(time, status)~sex + age, data=cancer) Output Call: coxph(formula = Surv(time, status) ~ sex + age, data = cancer) coef exp(coef) se(coef) z p sex -0.513219 0.598566 0.167458 -3.065 0.00218 age 0.017045 1.017191 0.009223 1.848 0.06459 Likelihood ratio test=14.12 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.