hadleyverse | A package to install packages from the hadleyverse
kandi X-RAY | hadleyverse Summary
kandi X-RAY | hadleyverse Summary
A package to install packages from the hadleyverse
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of hadleyverse
hadleyverse Key Features
hadleyverse Examples and Code Snippets
Community Discussions
Trending Discussions on hadleyverse
QUESTION
Quite often I need to calculate a new column for an R dataframe (in long form), whose value should depend on an aggregate function (e.g. sum) of a group. For instance, I might want to know what fraction of sales a product accounts for on any given day:
...ANSWER
Answered 2017-Feb-13 at 21:16Besides using summarise
to aggregate, you can use mutate
to assign summary stats to the full column:
QUESTION
I need to split strings in half by word count (when there's an odd number of words, the middle word should appear in both the left and right side). I also need to know which side each string came from.
...ANSWER
Answered 2018-Jan-17 at 23:01We can write some helper functions to make this easier
QUESTION
I have two very similar data frames, which ggplot2
sees differently; although the contents are the same the data structures are subtly different. One is a data.frame
, the other a data_frame
. I'd like to understand the difference in how ggplot2
sees them. In the following examples, both are being used in a stat_function
; the data.frame
produces plots while the data_frame
produces errors. This is particularly confusing in light of the interoperability of packages in the Hadleyverse. I first ran into this issue when I found that I was unable to create a plot from a data frame produced by dplyr (dplyr turns data.frames into data_frames) while a data frame I thought was identical (it wasn't, it was a data.frame) worked just fine.
Example 1
First, the working version from the data.frame
.
ANSWER
Answered 2017-Oct-10 at 16:22ggplot
was seeing a data frame where it expected a value.
This resulted from differences between the data types returned by the subsetting square-bracket operator applied when applied to a data.frame
or a tibble
(the data frame preferred by Hadley's dplyr
). Subsetting a data.frame
can change types by default, e.g. returning a vector or value. Subsetting a tibble
will return a tibble
unless the user requests re-casting explicitly, e.g. by using pull
or double-brackets [[]]
. The error message "Non-numeric argument to mathematical function" should have been a clue.
The following code demonstrates this by appropriately re-casting the tibble
s.
library(ggplot2)
library(dplyr)
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