How to tidy this dataset?

Question

I have the dataset below that I want to tidy up.

     user_id                topic may june july august september october
1     192775                 talk           


        

Answer 1

With:

library(tidyr)
df %>% gather(month, val, may:october) %>% spread(topic, val)

you get:

  user_id     month bark harp talk walk
1  192775    august    0    0    2  146
2  192775      july    0    0    0  128
3  192775      june    0    0    0  123
4  192775       may    0    0    2  165
5  192775   october    0    1    1  105
6  192775 september    0    0    2  113

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Another option is to use recast from the reshape2-package:

library(reshape2)
recast(df, user_id + variable ~ topic, id.var = c('user_id','topic'))