Question

我正在使用糖尿病数据集。我正在尝试拟合从我先前在训练集上获得的“最佳”模型，并报告该模型的测试错误。代码如下

library(nclSLR)
library(leaps)
library(glmnet)
data(diabetes)
set.seed(1)
(n = nrow(diabetes))
(p = ncol(diabetes) - 1)

train = diabetes [1:350,]
test = diabetes [351:442,]

grid=10^seq(10,-2,length=100)


best.subset=c("sex", "bmi", "map", "tc", "ldl", "ltg")

diabetes = diabetes[,best.subset]


#Train lm model
lm.mod=lm(sex~., diabetes[train,])

我在最后一行出现错误。它显示了

Error in xj[i] : invalid subscript type 'list'.

我尝试取消列表（），但仍然无法正常工作。

Answer 1

问题在于我们使用import subprocess import time def execute(command): print('start command: {}'.format(command)) process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE) print('wait') wait = 10 while process.poll() is None and wait > 0: time.sleep(1) wait -= 1 print('done') if wait == 0: print('terminate') process.terminate() print('communicate') stdout, stderr = process.communicate() print('rc') exit_code = process.returncode if exit_code != 0: print('got bad rc') if __name__ == '__main__': execute(['ping','-n','15','127.0.0.1']) # correctly times out execute(['ping','-n','5','127.0.0.1']) # correctly runs within the time limit # incorrectly times out execute(['C:\\dev\\jdk8\\bin\\java.exe', '-jar', 'JMXQuery-0.1.8.jar', '-url', 'service:jmx:rmi:///jndi/rmi://localhost:18080/jmxrmi', '-json', '-q', 'java.lang:type=Runtime;java.lang:type=OperatingSystem'])即行索引作为data.frame。在这里，我们需要已经创建的data.frame的子集，即“火车”

xj [i]中的错误：R中的下标类型“列表”无效

1 个答案: