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@xccds
xccds / gbm.R
Last active July 13, 2018 02:07
Learn Gradient Boosting Model by coding
# Learn Gradient Boosting Model by coding
# good slide
# http://www.ccs.neu.edu/home/vip/teach/MLcourse/4_boosting/slides/gradient_boosting.pdf
# http://cran.r-project.org/web/packages/gbm/gbm.pdf
#1 Gradient Boosting for Regression
# generate data
generate_func = function(n=1000,size=0.5){
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# 读取
df = read.csv('2014data.csv',stringsAsFactors =FALSE)
df1 = df[4:53]
df2 = df[54:57]
# 整理
library(plyr)
df1_names = names(df1)
names(df1) = paste0('x',1:ncol(df1))