Weird error in combination with dplyr::rowwise / df grouped by row about treemap HOT 3 CLOSED

Hi Stephan,

Seems like dplyr and data.table bite each other:

df <- data.frame(x=1:2, y=3:4, z=c("foo", "bar"))
class(df)
[1] "data.frame"
df <- df %>% rowwise %>% mutate(y = x+y) # for this example only
class(df)
[1] "rowwise_df" "tbl_df" "tbl" "data.frame"
dfDT <- as.data.table(df)
class(dfDT)
[1] "rowwise_df" "tbl_df" "tbl" "data.table" "data.frame"

I will have a look at it, a good reason for me to learn dplyr:)

Best,
Martijn

On 15/02/12 4:46 PM, Stephan Renatus wrote:

Hi,

The following behaviour confused me a lot today (maybe just for future
reference)

library(dplyr)
library(treemap)
df <- data.frame(x=1:2,y=3:4,z=c("foo","bar"))
treemap(df,index="z",vSize="x",type="index")# all good!

df <- df %>%rowwise %>% mutate(y = x+y)# for this example only
df
Source: local data frame [2 x 3]
Groups:

x y z
1 1 4 foo
2 2 6 bar

class(df)
[1]"rowwise_df" "tbl_df" "tbl" "data.frame"
treemap(df,index="z",vSize="x",type="index")
Error in :=(vColor.temp,1):
Check that is.data.table(DT)== TRUE.Otherwise,:= and :=(...)are defined for use in j,once only and in particular ways.See help(":=").
ungroup(df) %>% treemap(index="z",vSize="x",type="index")# all good!

I don't suggest that treemap does the ungroup'ing, but I'd not have
expected it to be that harmful ;)

Thanks!

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#14.

from treemap.

dplyr works now!

from treemap.

Thanks @mtennekes :)

from treemap.