Download and install RStudio

Try basic aspects of R

Assigning values to objects

Store the results of your computation as an object using the left arrow <-

The convention we will use in this unit is snake_case, where we separate multiple words by an underscore, and use all lower case. The most important thing though is to be consistent with your names.

本单元我们将使用 snake_case 命名规范，即用下划线分隔多个单词，并全部使用小写字母。不过，最重要的是确保名称保持一致。 * R语言大小写敏感

Using functions

runif() : random number generator function

Computing summaries

use mean() to compute mean

use range() to compute range

more information about function

Tasks for you

• Look up the help file for the function set seed

  

• How could you use it to ensure you get the same random numbers?

  using same seed

  

• You may have noticed the numbers you generated at your R console are different from the ones presented earlier. Why is that?

  i don’t use seed before