Logical expressions and subsets
Logical expressions which use the and (&), or (|), not (!), etc. operators are a powerful tool when creating more complicated filters based on certain criteria.
In this exercise, you'll combine several 'relational operators' – equals-to (==), less than (<), greater than or equal to (>=), etc. – to write an expression that determines if the index of the maunaloa dataset falls within a certain range. You'll then take that expression and use it to extract the observations of maunaloa within that range.
Este ejercicio forma parte del curso
Manipulating Time Series Data in R
Instrucciones del ejercicio
Write a logical expression for if the index of
maunaloais greater than or equal to1990and if the index is less than or equal to2010; assign this tosubset.Use square brackets (
[and]) to extract values frommaunaloathat match the expression defined insubsetand assign the result tomaunaloa_subset.Generate an autoplot of
maunaloa_subset.
Ejercicio interactivo práctico
Prueba este ejercicio completando el código de muestra.
# Complete the logical expression
subset <- ___ &
___
# Extract the subset of maunaloa
___ <- ___
# Autoplot the subsetted maunaloa dataset
___