我要用C++实现这段代码 求大神帮解释下R语言代码的意思

Question

OrgData=read.csv("DownlinkPower_train.csv",header=T)
TestData=read.csv("DownlinkPower_test.csv",header=T)

#remove abnormal data, optional //移除异常数据
OrgData = subset(OrgData, OrgData[,1] > 0)
TestData = subset(TestData, TestData[,1] > 0)

OrgData_colname = colnames(OrgData) //
OrgData = cbind(OrgData,1) //cbind 是合并矩阵？
colnames(OrgData) = c(OrgData_colname, "intercepts")
OrgData_colname = colnames(OrgData)

#
#nnls
#
x1 = as.matrix(OrgData[,2:dim(OrgData)[2]])
y1 = OrgData[,1]

求会R语言的大神 帮我解释下这段代码 越详细越好 谢谢！！！