来自 reshape2 包的熔化函数

Question

I keep getting a message saying that "objects are masked from 'package:data.table': dcast, melt" "Error: id variables not found in data: b". I tried to use the :: method and hoping it would work but it's not. What are other solutions out there? Any inputs are appreciated! Thank you!

library(reshape2)
mdat <- reshape2::melt (data2, id = 'b')
head(mdat)

Answer 1

Try this, Define idvar instead of id :

#Code
reshape2::melt(iris,idvar='Species')

In your case:

#Code2
mdat <- reshape2::melt (data2, idvar = 'b')

Answer 2

We can use pivot_longer from tidyr as tidyr functions mostly supercede the reshape2 package functions

library(tidyr)
pivot_longer(data2 cols = -b)