1. Aprender
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  2. Cursos
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  3. R from scratch
  • 1

    The R way

    Gratuito

    R is a language that allows you to define your data analysis in words. This may be an unfamiliar way of working, but experience shows that this approach quickly leads to a large increase in power and efficiency.

  • 2

    Data frames and functions

    We use functions to examine data frames.

  • 3

    Working with columns

    Data frames contain data, arranged in columns. In this chapter we get the column data and analyze it, using descriptive statistics.

  • 4

    Looking at data with plots

    R has very powerful tools for looking at data with plots. We explore some simple plots.

Initializing

Exercicio

Columns as variables

This is a little revision and expansion on variables.

In the exercise you have just done, you displayed all the values for the mat_mort_ratio column with:

gender_data$mat_mort_ratio

Instead of printing out the values in the column, we may want to point to these values with a variable name. We do this in exactly the same way as we do when setting other variables. For example, here we give the name mat_mort_vals to the mat_mort_ratio column.

mat_mort_vals <- gender_data$mat_mort_ratio

Instruções

100 XP

Make a new variable health_exp_col that points to the health_exp_per_cap column in the gender_data data frame. Display the contents of your new health_exp_col variable.