[问题类型]:
程式咨询(我想用R 做某件事情，但是我不知道要怎么用R 写出来)
[软件熟悉度]:
入门(写过其他程式，只是对语法不熟悉)
[问题叙述]:
不好意思 原始资料中 有些空白被填上- ? NA这种
但实际上他是遗漏值, 有没有什么方式可以把它们取代成空白
让is.na判断成是遗漏值, 谢谢!!
[程式范例]:
wdbc=read.table("DM_Assignment_2_Kidney.csv", header=F,sep=",")
wdbc1=wdbc
names(wdbc) <- c("Age","Blood Pressure","Specific
Gravity","Albumin","Sugar","Red Blood Cells","Pus Cell","Pus Cell
clumps","Bacteria","Blood Glucose Random","Blood Urea","Serum
Creatinine","Sodium","Potassium","Hemoglobin","Packed Cell Volume","White
Blood Cell Count","Red Blood Cell Count","Hypertension","Diabetes
Mellitus","Coronary Artery Disease","Appetite","Pedal Edema","Anemia","Class")
for(i in 1:25)(
wdbc1[,i]<-gsub("[?]",NA, wdbc[,i])
)
[关键字]:
遗漏值