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SUBROUTINE GRFGA (X1,X,X2, Y1,Y,Y2, N, PL2)
C$ (Graph Array)
C$ Plot a graph by connecting the data points by straight
C$ lines. The points defining the graph are taken from two
C$ arrays, one holding the X-values and the other containing
C$ the Y-values. The respective scales are indicated by the
C$ values to be assigned to the margins of the graph.
C$ Ordinarily the margins would be given rounded values
C$ slightly larger than the extreme data values. However, the
C$ graph may be centered in various ways by assigning one or
C$ more margins considerably larger values. Likewise excerpts
C$ from the graph may be chosen by giving the margins lesser
C$ values than the extremes.
C$
C$ X1..........X lower limit
C$ X(N)........Array of X values
C$ X2..........X upper limit
C$ Y1..........Y lower limit
C$ Y(N)........Array of Y values
C$ Y2..........Y upper limit
C$ N...........Number of points
C$ PL2.........2-D pen movement subroutine, usually PL2CA
C$
C$ For convenience in producing graphs with falling axis
C$ scales, X1 may be larger than X2, and/or Y1 larger than Y2.
C$ (08-JUL-80)