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Question: > quantiles spline_4

> quantiles <- quantile(data$age, probs = c(0.05, 0.35, 0.65, 0.95)) > spline_4 <- lm(death ~ bs(age, knots = quantiles), data = data) Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : NA/NaN/Inf in 'y' In addition: Warning message: In storage.mode(v) <- "double" : NAs introduced by coercion

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