LINE Subcommand (GRAPH command)

LINE creates one of five types of line charts using the keywords SIMPLE, MULTIPLE, DROP, AREA, or DIFFERENCE.

• Only one keyword can be specified, and it must be specified in parentheses.
• When no keyword is specified, the default is either SIMPLE or MULTIPLE, depending on the type of function/variable specification.

SIMPLE. Simple line chart. A simple line chart is defined by a single function and a single BY variable or by multiple functions and no BY keyword. This is the default if no keyword is specified on LINE and the data define a simple line.

MULTIPLE. Multiple line chart. A multiple line chart is defined by a single function and two BY variables or by multiple functions and a single BY variable. This is the default if no keyword is specified on LINE and the data define a multiple line.

DROP. Drop-line chart. A drop-line chart shows the difference between two or more fluctuating variables. It is defined by a single function and two BY variables or by multiple functions and a single BY variable.

AREA. Area line chart. An area line chart fills the area beneath each line with a color or pattern. When multiple lines are specified, the second line is the sum of the first and second variables, the third line is the sum of the first, second, and third variables, and so on. The specification is the same as that for a simple or multiple line chart.

DIFFERENCE. Difference area chart. A difference area chart fills the area between a pair of lines. It highlights the difference between two variables or two groups. A difference area chart is defined by a single function and two BY variables or by two summary functions and a single BY variable. If a second BY variable is used to define the two groups, the variable must be dichotomous.