This is a programming question. I am not understanding how to print out 1 element of a vector. My code is given below:
这是一个编程问题。我不明白如何打印出矢量的1个元素。我的代码如下：
# creating a range of values to test for accuracy
thresh=seq(0,1,by=0.05)
acc = matrix(0,1,20)
# computing accuracy for different threshold values from 0 to 1 step by 0.05
for (i in 1:21){
matrix = confusion.matrix(obs,pred,threshold=thresh[i])
acc[i]=(matrix[1,1]+matrix[2,2])/nrow(test)
acc[i]}
max(acc)
library(nnet)
which.is.max(acc)
acc
#Q how can I print only thresh[12] the first max(acc)?
there may be more than one thresh with the max(acc).
print(thresh)
???
???
1 个解决方案
#1
2
If I understand what you're asking, this should work. Here's a simple example.
如果我明白你在问什么，这应该有效。这是一个简单的例子。
a <- c(1,2,3,3)
thresh <- c(1,2,3,4)
# run at command line
> thresh[a==max(a)]
[1] 3 4
#1
2
If I understand what you're asking, this should work. Here's a simple example.
如果我明白你在问什么，这应该有效。这是一个简单的例子。
a <- c(1,2,3,3)
thresh <- c(1,2,3,4)
# run at command line
> thresh[a==max(a)]
[1] 3 4