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January 17, 2016 22:18
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| loocv = function(formula, data) { | |
| pred = rep(NA, nrow(data)) | |
| for(i in 1:nrow(data)) { | |
| fit = lm(formula = formula, data = data[-i, ]) | |
| pred[i] = predict(fit, data[i, ]) | |
| } | |
| data.frame(obs = data[, all.vars(formula)[1]], pred = pred) | |
| } |
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