dplyr mutate in zoo object

问题

I was trying to apply the dplyr mutate in zoo object. But, it generated an error:

Error in UseMethod("mutate") : 
  no applicable method for 'mutate' applied to an object of class "zoo". 

I googled and saw that it has not been yet resolved. A recent discussion on this is here.

I would appreciate if any one could help me in this regard.

回答1:

zoo has a transform method:

library(zoo)
z <- zoo(cbind(a = 1:3, b = 4:6))

transform(z, a = a + 1, c = a + b)

giving:

  a b c
1 2 4 5
2 3 5 7
3 4 6 9

or using z from above, the following gives the same result:

library(magrittr)
z %>% transform(a = a + 1, c = a + b)

Next time please provide sample code, inputs and expected outputs.

来源：https://stackoverflow.com/questions/28886253/dplyr-mutate-in-zoo-object