R 如何仅拾取值大于0的属性 f
这将得到所有大于零的值：R 如何仅拾取值大于0的属性 f,r,R,这将得到所有大于零的值： f<-function(data) + { + braz<-read.csv("braz.csv",header=T) + index<-1:nrow(braz) + tindex<-sample(index,trunc(length(index)*.7)) + trainbraz<-braz[tindex,] + testbraz<-braz[-ti
f<-function(data)
+ {
+ braz<-read.csv("braz.csv",header=T)
+ index<-1:nrow(braz)
+ tindex<-sample(index,trunc(length(index)*.7))
+ trainbraz<-braz[tindex,]
+ testbraz<-braz[-tindex,]
+ weights<-chi.squared(Class~.,trainbraz)
+ return(weights)
}
f() #after running the function the require result is shown below. i want a code to be inserted in this function which will give me only values greater than 0
attr_importance
Word1 0.0000000
Word2 0.0000000
Word3 0.0000000
Word4 0.0000000
Word5 0.0000000
Word6 0.0000000
Word7 0.4224098
Word8 0.0000000
Word9 0.0000000
Word10 0.0000000
Word11 0.3544805
Word12 0.2957039
Word13 0.0000000
Word14 0.0000000
Word15 0.0000000
Word16 0.0000000
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Word19 0.0000000
Word20 0.0000000
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Word30 0.2886572
Word31 0.0000000
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Word202 0.6386000
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Word212 0.0000000
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Word572 0.0000000
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Word608 0.5150927
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Word616 0.0000000
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Word2,0.0000000
Word3,0.0000000
Word4,0.0000000
Word5,0.0000000
Word6,0.0000000
Word7,0.4224098
Word8,0.0000000
Word9,0.0000000
Word10,0.0000000
Word11,0.3544805
Word12,0.2957039
Word13,0.0000000
Word14,0.0000000
Word15,0.0000000
Word16,0.0000000
Word17,0.0000000
Word18,0.0000000
Word19,0.0000000
Word20,0.0000000
Word21,0.0000000
Word22,0.0000000
Word23,0.0000000
Word24,0.0000000
Word25,0.0000000
Word26,0.0000000
Word27,0.0000000
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Word29,0.0000000
列表> df[df[,2] > 0,]
Word1 X0.0000000
6 Word7 0.4224098
10 Word11 0.3544805
11 Word12 0.2957039
> df[df[,2] > 0,1] # get words only
[1] "Word7" "Word11" "Word12"
fI似乎不知道你的列名是什么。带十进制数的列的名称是什么？@user1477388第一个列名是属性，第二个是值。这里列名不重要。我需要的是在函数中传递一个变量，该变量将只拾取那些值大于零的属性\n这很好。但是我想在上面声明的函数中运行代码。我无法创建新文档。我想通过在运行上述函数后获得的值之上运行函数来获得结果，然后尝试使用您编辑的myData，在函数运行期间，我无法添加新文档。在函数结束时，我需要的答案将仅是值大于零的属性。我希望您理解我的问题。整个代码必须在函数中。我将只调用函数并显示值。
> df[df[,2] > 0,]
Word1 X0.0000000
6 Word7 0.4224098
10 Word11 0.3544805
11 Word12 0.2957039
> df[df[,2] > 0,1] # get words only
[1] "Word7" "Word11" "Word12"
f<-function(data) {
braz<-read.csv("braz.csv",header=T)
index<-1:nrow(braz)
tindex<-sample(index,trunc(length(index)*.7))
trainbraz<-braz[tindex,]
testbraz<-braz[-tindex,]
weights<-chi.squared(Class~.,trainbraz)
weightsGreaterThanZero <- weights[weights > 0]
return(weightsGreaterThanZero)
}