C Library Functions - fline (3)
NAME
fline(3f) - [M_calcomp:scientific] plot a polyline with optional fit (LICENSE:PD)
CONTENTS
Synopsis
Description
Options
Comments
Examples
License
SYNOPSIS
subroutine fline(xarray,yarray,npts,inc,+-lintyp,inteq)
DESCRIPTION
OPTIONS
XARRAY is the name of the array containing the values to be plotted as the abscissa and the appropriate scaling parameters. YARRAY is the name of the array containing the values to be plotted as the ordinates and the appropriate scaling parameters. NPTS is the number of data points to be plotted: if NPTS >0 a straight line is drawn between the points.if NPTS <0 a smooth curve, drawn using a modified spline-fitting technique, is drawn between the points.
INC is the increment between elements in the array to be plotted. INC >1 if the values to be plotted are in a mixed array. (Usually INC = 1.) LINTYP is used to control the type of graph produced: if LINTYP = 0 a line is plotted between successive data points. (No symbols are plotted.)if LINTYP = 1 a line plot is produced, with a symbol at each data point.
if LINTYP = n a line plot is produced, with a symbol at every nth data point.
if LINTYP = -n, connecting lines are not plotted between data points; a symbol appears at every nth data point.
INTEQ is the integer equivalent used to specify the symbol to be plotted at a data point. (Refer to the description of SYMBOL for possible values of INTEQ.)
COMMENTS
The arrays must be dimensioned with at least NPTS + 2 elements. The adjusted minimum value (FIRSTV) and the adjusted delta value (DELTAV), normally provided by the SCALE subroutine, must be stored following the data array.
For the X array, the adjusted minimum is stored in XARRAY (NPTS*INC + 1), and the adjusted delta is in XARRAY (NPTS*INC + INC + 1). Similarly, for the Y array, the minimum is in YARRAY (NPTS*INC + 1), and the delta is in YARRAY (NPTS*INC + INC + 1). Therefore, XARRAY and YARRAY must be dimensioned to be at least NPTS*INC+INC+1 .
If scaling is not required, the user must place the appropriate minimum and delta values in the specified elements in the arrays. For a one-to-one correspondence between array data and plotted data, these values should be 0.0 (minimum) and 1.0 (delta).
EXAMPLES
Sample program
program demo_fline use M_calcomp implicit none ! based on concepts of CALIFORNIA COMPUTER PRODUCTS, 1968 real :: xar(10)=[0.75,1.75,2.25,2.75,3.25,4.25,4.75,5.75,0.0,1.0] real :: yar(10)=[3.25,2.00,5.25,6.50,6.75,6.25,3.25,4.25,0.0,1.0] character(len=50) :: ibcd integer :: inteq call plots(0.0,10.0,0.0,10.0) ! DRAW FRAME call plot(7.0,0.0,2) call plot(7.0,9.0,2) call plot(0.0,9.0,2) call plot(0.0,0.0,2) ! DRAW AXIS ibcd=’SERVICE TIME’ call axis(0.75,0.75,ibcd,-12,5.0,0.0,5.0,1.0) ibcd=’FREQUENCY’ call axis(0.75,0.75,ibcd, 9,7.0,90.0,0.0,100.0) ! DRAW COMMENTS ibcd=’USING FLINE AND SMOOT SUBROUTINES’ call symbol(0.7,8.25,0.14,ibcd,inteq,0.0,34) call plot(5.0,7.8,3) call plot(5.1,7.8,2) ibcd=’SMOOT’ call symbol(5.2,7.80,0.09,ibcd,inteq,0.0, 6) inteq = 1 call symbol(5.0,7.60,0.10,ibcd,inteq,0.0,-1) inteq=999 ibcd=’FLINE’ call symbol(5.2,7.60,0.09,ibcd,inteq,0.0, 5) ! SMOOTHING call smoot(0.75,3.75,0) call smoot(1.75,2.5,-2) call smoot(2.25,5.75,-2) call smoot(2.75,7.0,-2) call smoot(3.25,7.25,-2) call smoot(4.25,6.75,-2) call smoot(4.75,3.75,-2) call smoot(5.75,4.75,-24) ! FLINE IS USED call plot(0.75,3.25,3) call fline(xar, yar, -8,1,1,1) call nframe() end program demo_fline
LICENSE
Public Domain
| Nemo Release 3.1 | fline (3) | February 23, 2025 |
