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dcast.data.table( drop = FALSE) does not fill missing factors #893

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matthieugomez opened this issue Oct 15, 2014 · 2 comments
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dcast.data.table( drop = FALSE) does not fill missing factors #893

matthieugomez opened this issue Oct 15, 2014 · 2 comments
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@arunsrinivasan
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bug
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v1.9.6

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@matthieugomez
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dcast.data.table( drop = FALSE) does not add columns for missing levels in a factor variable

library(data.table)
library(reshape2)
df <- data.table(
    x = factor("a", levels = c("a", "b")),
    y = factor("b", levels = c("a", "b")),
    z = 1
  )
dcast(df, y~x, drop = FALSE)
dcast.data.table(df, y~x, drop = FALSE)
@arunsrinivasan arunsrinivasan added this to the v1.9.8 milestone Oct 20, 2014
@arunsrinivasan arunsrinivasan self-assigned this Oct 20, 2014
arunsrinivasan added a commit that referenced this issue Nov 6, 2014
@arunsrinivasan
Closes #893. dcast handles factor levels correctly on drop=FALSE.
4fe7314
@arunsrinivasan
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Fixed in 4fe7314. Will close after adding README.

@arunsrinivasan arunsrinivasan modified the milestones: v1.9.6, v1.9.8 Dec 13, 2014
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Moved to 1.9.6.

@arunsrinivasan arunsrinivasan mentioned this issue Jan 30, 2015
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