data.table: Extension of `data.frame`
Convert all character columns to factors? x. A data.table. i. Integer logical or character vector
data.table
powerful Python data analysis toolkit - pandas
23 juin 2022 To manually store data in a table create a DataFrame. When using a Python dictionary of lists
pandas
Cheat Sheet: The pandas DataFrame Object
from pandas import DataFrame Series Typically
Pandas DataFrame Notes pages
Apply functions with purrr : : CHEAT SHEET
Map functions apply a function iteratively to each element of a list or vector. Unnests a nested data frame. 1 Make a list column. 3 Simplify the list.
R purrr
dplyr.pdf
27 avr. 2022 across() returns a tibble with one column for each column in .cols ... orders the rows of a data frame by the values of selected columns.
dplyr
S4Vectors: Foundation of vector-like and list-like containers in
18 août 2022 Also another. DataFrame can hold metadata on the columns. For a class to be supported as a column
S Vectors
Creating Lists! Using the Powerful INTO Clause with PROC SQL to
Lists can be invaluable for numerous operations in SAS® including columns in a data set or removing all rows containing particular values of a variable.
Pandas DataFrame Notes
The columns are made up of pandas Series objects. Maths on the whole DataFrame (not a complete list) ... Boolean row selection by values in a column.
pandas dataframe notes
BBmisc: Miscellaneous Helper Functions for B. Bischl
10 mars 2022 convertRowsToList. Convert rows (columns) of data.frame or matrix to lists. Description. For each row one list/vector is constructed
BBmisc
str2str: Convert R Objects from One Structure to Another
5 sept. 2021 as.data.frame.array which converts the (3D+) array to a matrix first; ... TRUE then all columns in the returned list of data.frames will be ...
str str
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