R select first n rows

Cheat sheet DataTable R - Amazon S3

R For Data Science General form:Cheat Sheet data.table Learn R for data science Interactively at www.DataCamp.com data.table DataCamp Learn Python for Data Science Interactively

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November 9th,2019

Exploring Data and Descriptive Statistics (using R)

Release the mouse button and select Copy Here. • Right‐click on the new icon and select Properties. Edit the Targetfield on the Shortcuttab to read "C:\Program Files\R\R‐2.5.1\bin\Rgui.exe" ‐‐sdi(including the quotes exactly as shown, and assuming that you've installed R to the default location).

November 9th,2019

Introduction to the data.table package in R

Introduction to the data.table package in R Revised: October 2, 2014 (A later revision may be available on thehomepage) Introduction This vignette is aimed at those who are already familiar with creating and subsetting data.frame

November 9th,2019

Introduction to R - University of California, Berkeley

Introduction to R Phil Spector Statistical Computing Facility Department of Statistics University of California, Berkeley 1 Some Basics There are three types of data in R: numeric, character and logical. R supports vectors, matrices, lists and data frames. Objects can be assigned values using an equal sign (=) or the special <-operator.

November 9th,2019

Package ‘fastDummies’ - R

Package ‘fastDummies’ September 3, 2019 Type Package Title Fast Creation of Dummy (Binary) Columns and Rows from Categorical Variables Version 1.5.0 Description Creates dummy columns from columns that have categorical variables (character or fac-tor types). You can also specify which columns to make dummies out of, or which columns to ig-nore.

November 9th,2019

Cheat sheet DataTable R - Amazon S3

R For Data Science General form:Cheat Sheet data.table Learn R for data science Interactively at www.DataCamp.com data.table DataCamp Learn Python for Data Science Interactively

November 9th,2019

Using iloc and loc to select rows and columns in Pandas ...

Using a boolean True/False series to select rows in a pandas data frame – all rows with first name of ^Antonio _ are selected. As before, a second argument can be passed to .loc to select particular columns out of the data frame.

November 9th,2019

The Basics of R for Windows - School of Public Health

The Basics of R for Windows We will use the data set timetrial.repeated.dat to learn some basic code in R for Windows. Commands will be shown in a different font, …

November 9th,2019

Data Transformation with dplyr : : CHEAT SHEET

w Summarise Cases group_by(.data, ..., add = FALSE) Returns copy of table grouped by … g_iris <- group_by(iris, Species) ungroup(x, …) Returns ungrouped copy

November 9th,2019

Manipulação de dados com o dplyr

Detalhes do dplyr I O dplyr é a gramática para manipulação de dados. I Tem um conjunto consistente de verbos para atuar sobre tabelas. I Verbos: mutate(),select() filter() arrange()

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