我不确定如何使用rpy2在python中重现以下R代码。我不确定如何在训练模型时实现R语法 type.measure =" class" ,并且我的R代码的最后两行丢失了在python中尝试。
library("foreach")
library("glmnet")
library(datasets)
data(iris)
y <- as.numeric(iris[,5])
X <- iris[1:4]
model_lambda <- cv.glmnet(as.matrix(X), as.factor(y), alpha=0,
family="multinomial", type.measure="class")
best_s <- model_lambda$lambda.1se
prediction <- predict(model_lambda,newx=as.matrix(X), type="class" , s=best_s)
未完成的python代码:
import numpy as np
import rpy2.robjects as robjects
from rpy2.robjects.packages import importr
importr('foreach')
glmnet = importr('glmnet')
import rpy2.robjects.numpy2ri as numpy2ri
numpy2ri.activate()
from sklearn import datasets
iris = datasets.load_iris()
X = iris.data
y = iris.target
model_lambda = glmnet.cv_glmnet(X, robjects.FactorVector(y), alpha=1, family="multinomial")
答案 0 :(得分:2)
如果R函数中的参数是在函数签名中定义的,则rpy2的importr
会将点转换为下划线。否则,可以使用python运算符**
(请参阅http://rpy2.readthedocs.io/en/version_2.8.x/robjects_functions.html#functions)