Therefore, we have our dataset which is not in factors. I’ll now store this data in another variable asfactors. I can do that very quickly using the as.factor() command, whichconverts any vector into a factor. This is important for now because our goal here is to work withfactors. ...
new 数据如下所示: 每一列都是因子型: 现在想把数据框每一列都转为数值型,则可以使用命令:new1=apply(new,2,function(x) as.numeric(as.character(x))) 转完后,如下所示:
R语言使用factor函数将字符串向量转化为因子向量、使用levels函数查看因子的水平 mydata mydata$gen...
Combineas.characterandas.numericFunctions to Convert Factor to Numeric in R The factor levels can be converted to the integer type by combiningas.characterandas.numericfunctions.as.characterreturns factor levels as character strings. Then we can call theas.numericfunction to coerce string to numbers....
直接用as.numeric转换会有问题，转换后的内容不是你想要的：2）因子中 levels和lables的区别 levels代表...
If you have a vector of factors it is easy to get the factor level; however, I always forget how to extract the factor value. I ran into the answer here. > x x [1] 1.61 1.12 1.26 0.09 -0.13 0.16 -0.03 -0.1 0.09 -0.47 [11] A B Levels: -0.03 0.09 -0.1 -0.1
#convert all character columns to factor df <- as.data.frame(unclass(df), stringsAsFactors = TRUE) #display classes of each column sapply(df, class) a b c d "factor" "factor" "factor" "numeric" 安利一个R语言的优秀博主及其CSDN专栏: ...
# Create a factor vector.x=factor(c(15,15,20,25,30,30,30))# See that these are 4 levels of factors.# They are not numbers.str(x)# Convert the factor vector to numeric.as.numeric(x)# This is not the result we want. 输出: ...
The example code shows what happens when a factor column is converted to numeric. Example code: # Create a factor vector.x=factor(c(15,15,20,25,30,30,30))# See that these are 4 levels of factors.# They are not numbers.str(x)# Convert the factor vector to numeric.as.numeric(x)#...
Our previous studies indicated that cloned T cells obtained from Peyer's patches (PP) (Lyt-1+, 2-, Ia+, and H-2K/D+) evoked immunoglobulin (Ig) class switching of PP B cells from sIgM to sIgA cells in vitro; however, these switch T cells... H Kawanishi,L Saltzman,W Strober -...