课程

Introduction to Writing Functions in R

基础技能水平

更新时间 2024年8月

Take your R skills up a notch by learning to write efficient, reusable functions.

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RProgramming

4 小时

14 视频

52 练习

4,350 经验值

52,910

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课程描述

Being able to write your own functions makes your analyses more readable, with fewer errors, and more reusable from project to project. Function writing will increase your productivity more than any other skill! In this course you'll learn the basics of function writing, focusing on the arguments going into the function and the return values. You'll be writing useful data science functions, and using real-world data on Wyoming tourism, stock price/earnings ratios, and grain yields.

先决条件

Introduction to the Tidyverse Intermediate R

1

How to Write a Function

Learn why writing your own functions is useful, how to convert a script into a function, and what order you should include the arguments.

Why you should use functions

50 经验值

Calling functions

100 经验值

The benefits of writing functions

50 经验值

Converting scripts into functions

50 经验值

Converting a script to a function

100 经验值

Your first function: tossing a coin

100 经验值

Inputs to functions

100 经验值

Multiple inputs to functions

100 经验值

Y kant I reed ur code?

50 经验值

Data or detail?

100 经验值

Renaming GLM

100 经验值

2

All About Arguments

Learn how to set defaults for arguments, how to pass arguments between functions, and how to check that users specified arguments correctly.

Default arguments

50 经验值

Numeric defaults

100 经验值

Logical defaults

100 经验值

NULL defaults

100 经验值

Categorical defaults

100 经验值

Passing arguments between functions

50 经验值

Harmonic mean

100 经验值

Dealing with missing values

100 经验值

Passing arguments with ...

100 经验值

Checking arguments

50 经验值

Throwing errors with bad arguments

100 经验值

Custom error logic

100 经验值

Fixing function arguments

100 经验值

3

Return Values and Scope

Learn how to return early from a function, how to return multiple values, and understand how R decides which variables exist.

Returning values from functions

50 经验值

Returning early

100 经验值

Returning invisibly

100 经验值

Returning multiple values from functions

50 经验值

Returning many things

100 经验值

Returning metadata

100 经验值

Environments

50 经验值

Creating and exploring environments

100 经验值

Do variables exist?

100 经验值

Scope and precedence

50 经验值

Can a function find its variables?

100 经验值

Can you access variables from inside functions?

100 经验值

Variable precedence 1

50 经验值

Variable precedence 2

50 经验值

4

Case Study on Grain Yields

Apply your function writing skills to a case study involving data preparation, visualization, and modeling.

Grain yields and unit conversion

50 经验值

Converting areas to metric 1

100 经验值

Converting areas to metric 2

100 经验值

Converting yields to metric

100 经验值

Applying the unit conversion

100 经验值

Visualizing grain yields

50 经验值

Plotting yields over time

100 经验值

A nation divided

100 经验值

Plotting yields over time by region

100 经验值

Modeling grain yields

50 经验值

Running a model

100 经验值

Making yield predictions

100 经验值

Do it all over again

100 经验值

Congratulations

50 经验值

Introduction to Writing Functions in R

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