Line Plot with Durations .................................
7-37
Scatter Plot with Dates and Durations ......................
7-39
Plots that Support Dates and Durations .....................
7-40
Core Functions Supporting Date and Time Arrays ..............
7-41
Convert Between Datetime Arrays, Numbers, and Text ..........
7-42
Overview ............................................
7-42
Convert Between Datetime and Character Vectors .............
7-42
Convert Between Datetime and String Arrays .................
7-44
Convert Between Datetime and Date Vectors .................
7-44
Convert Serial Date Numbers to Datetime ...................
7-45
Convert Datetime Arrays to Numeric Values ..................
7-45
Carryover in Date Vectors and Strings ........................
7-47
Converting Date Vector Returns Unexpected Output ............
7-48
Categorical Arrays
8
Create Categorical Arrays ...................................
8-2
Convert Text in Table Variables to Categorical ..................
8-6
Plot Categorical Data .....................................
8-10
Compare Categorical Array Elements ........................
8-16
Combine Categorical Arrays ................................
8-19
Combine Categorical Arrays Using Multiplication ..............
8-22
Access Data Using Categorical Arrays ........................
8-24
Select Data By Category .................................
8-24
Common Ways to Access Data Using Categorical Arrays .........
8-24
Work with Protected Categorical Arrays ......................
8-30
Advantages of Using Categorical Arrays ......................
8-34
Natural Representation of Categorical Data ..................
8-34
Mathematical Ordering for Character Vectors .................
8-34
Reduce Memory Requirements ............................
8-34
Ordinal Categorical Arrays .................................
8-36
Order of Categories ....................................
8-36
How to Create Ordinal Categorical Arrays ...................
8-36
Working with Ordinal Categorical Arrays ....................
8-38
Core Functions Supporting Categorical Arrays ................
8-39
x
Contents
7-37
Scatter Plot with Dates and Durations ......................
7-39
Plots that Support Dates and Durations .....................
7-40
Core Functions Supporting Date and Time Arrays ..............
7-41
Convert Between Datetime Arrays, Numbers, and Text ..........
7-42
Overview ............................................
7-42
Convert Between Datetime and Character Vectors .............
7-42
Convert Between Datetime and String Arrays .................
7-44
Convert Between Datetime and Date Vectors .................
7-44
Convert Serial Date Numbers to Datetime ...................
7-45
Convert Datetime Arrays to Numeric Values ..................
7-45
Carryover in Date Vectors and Strings ........................
7-47
Converting Date Vector Returns Unexpected Output ............
7-48
Categorical Arrays
8
Create Categorical Arrays ...................................
8-2
Convert Text in Table Variables to Categorical ..................
8-6
Plot Categorical Data .....................................
8-10
Compare Categorical Array Elements ........................
8-16
Combine Categorical Arrays ................................
8-19
Combine Categorical Arrays Using Multiplication ..............
8-22
Access Data Using Categorical Arrays ........................
8-24
Select Data By Category .................................
8-24
Common Ways to Access Data Using Categorical Arrays .........
8-24
Work with Protected Categorical Arrays ......................
8-30
Advantages of Using Categorical Arrays ......................
8-34
Natural Representation of Categorical Data ..................
8-34
Mathematical Ordering for Character Vectors .................
8-34
Reduce Memory Requirements ............................
8-34
Ordinal Categorical Arrays .................................
8-36
Order of Categories ....................................
8-36
How to Create Ordinal Categorical Arrays ...................
8-36
Working with Ordinal Categorical Arrays ....................
8-38
Core Functions Supporting Categorical Arrays ................
8-39
x
Contents