Annotation of OpenXM_contrib/gnuplot/demo/contours.dem, Revision 1.1
1.1 ! maekawa 1: #
! 2: # $Id: contours.dem,v 1.2 1993/09/27 17:11:16 alex Exp $
! 3: #
! 4: set samples 20
! 5: set isosamples 21
! 6: set xlabel "X axis" -5,-2
! 7: set ylabel "Y axis" 4,-1
! 8: set zlabel "Z axis"
! 9: set title "3D gnuplot demo - contour plot"
! 10: set contour
! 11: splot x*y
! 12: pause -1 "Hit return to continue (1)"
! 13: set cntrparam levels 20
! 14: set title "3D gnuplot demo - contour plot (more contours)"
! 15: replot
! 16: pause -1 "Hit return to continue (2)"
! 17: set cntrparam levels incr -100,10,100
! 18: set title "3D gnuplot demo - contour plot (every 10, starting at -100)"
! 19: replot
! 20: pause -1 "Hit return to continue (3)"
! 21: set cntrparam levels disc -75,-50,0
! 22: set title "3D gnuplot demo - contour plot (at -75, -50, 0)"
! 23: replot
! 24: pause -1 "Hit return to continue (4)"
! 25: set cntrparam levels auto 10
! 26: set title "3D gnuplot demo - contour plot on base grid"
! 27: set contour base
! 28: splot x**2-y**2
! 29: pause -1 "Hit return to continue (5)"
! 30: set title "3D gnuplot demo - contour plot on surface"
! 31: set contour surface
! 32: replot
! 33: pause -1 "Hit return to continue (6)"
! 34: set title "3D gnuplot demo - contour plot on both"
! 35: set contour both
! 36: replot
! 37: pause -1 "Hit return to continue (7)"
! 38: set contour base
! 39: set title "3D gnuplot demo - 2 surfaces
! 40: splot x**2*y**3, x**3*y**2
! 41: pause -1 "Hit return to continue (8)"
! 42: set title "3D gnuplot demo - some more interesting contours"
! 43: splot x*y / (x**2 + y**2 + 0.1)
! 44: pause -1 "Hit return to continue (9)"
! 45: splot [x=-3:3] [y=-3:3] sin(x) * cos(y)
! 46: pause -1 "Hit return to continue (10)"
! 47: set zrange [-0.5:0.5]
! 48: replot
! 49: pause -1 "Hit return to continue (11)"
! 50: set samples 6
! 51: set isosamples 6
! 52: set cntrparam levels 5
! 53: set title "3D gnuplot demo - low resolution (6x6)"
! 54: replot
! 55: pause -1 "Hit return to continue (12)"
! 56: set cntrparam bspline
! 57: set title "3D gnuplot demo - low resolution (6x6) using bspline approx."
! 58: replot
! 59: pause -1 "Hit return to continue (13)"
! 60: set cntrparam order 8
! 61: set title "3D gnuplot demo - low resolution (6x6) raise bspline order."
! 62: replot
! 63: pause -1 "Hit return to continue (14)"
! 64: set cntrparam linear
! 65: set auto
! 66: set title "3D gnuplot demo - low resolution (6x6) using linear contours."
! 67: splot x*y
! 68: pause -1 "Hit return to continue (15)"
! 69: set cntrparam order 4
! 70: set cntrparam bspline
! 71: set title "3D gnuplot demo - low resolution (6x6) using bspline approx."
! 72: replot
! 73: pause -1 "Hit return to continue (16)"
! 74: set samples 25
! 75: set isosamples 26
! 76: set title "3D gnuplot demo - contour of Sinc function"
! 77: splot [-5:5.01] [-5:5.01] sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2)
! 78: pause -1 "Hit return to continue (17)"
! 79: splot [-12:12.01] [-12:12.01] sin(sqrt(x**2+y**2)) / sqrt(x**2+y**2)
! 80: pause -1 "Hit return to continue (18)"
! 81: set cntrparam levels 10
! 82: set xrange [0:15]
! 83: set yrange [0:15]
! 84: set auto
! 85: set zrange [-0.6:0.6]
! 86: set data style lines
! 87: set title "3D gnuplot demo - contour of data grid plotting"
! 88: set parametric
! 89: splot "glass.dat"
! 90: pause -1 "Hit return to continue (19)"
! 91: set zrange [-1.2:1.2]
! 92: set noparametric
! 93: splot "glass.dat" using 1
! 94: pause -1 "Hit return to continue (20)"
! 95: set view 0,0,1
! 96: set nosurface
! 97: set title "3D gnuplot demo - 2D contour projection of last plot"
! 98: replot
! 99: pause -1 "Hit return to continue (21)"
! 100:
! 101: #From: shen@athena.cs.uga.edu (Mingzuo Shen)
! 102: #Subject: Rosenbrock's function: some answers and thanks
! 103: #Date: Wed, 23 Jun 1993 20:50:36 GMT
! 104: #
! 105: # Last night I asked for help with a contour plot for the function:
! 106: #
! 107: # (1-x)**2 + 100 * (y - x**2)**2
! 108: #
! 109: #which should have a minimum at (x=1,y=1). This is the 2D case of a more
! 110: #general function named after Rosenbrock (the book I am reading does not
! 111: #give a reference to any paper/book by this person):
! 112: #
! 113: # for even integer n,
! 114: #
! 115: # f(x) = \sum_{j=1,3,5,\ldots,n} [(1 - x_j)^2 + 100(x_{j+1} - x_j^2)^2]
! 116: #
! 117: #where x is a vector (x1, x2, ..., x_n). This function also have a minimum
! 118: #at (1,1,...,1), which lies at the base of a "banana-shaped valley".
! 119: #Here are the new commands I have tried.
! 120: #
! 121: set auto
! 122: set surface
! 123: set nocontour
! 124: set cntrparam levels 5
! 125: set cntrparam linear
! 126: set samples 100
! 127: set logscale z
! 128: set hidden3d
! 129: set isosamples 20
! 130: set view 70,335,1
! 131: set xlabel "x"
! 132: set ylabel "y"
! 133: set title "Rosenbrock Function"
! 134: splot [0.9:1.1] [0.9:1.1] (1-x)**2 + 100*(y - x**2)**2
! 135: pause -1 "Hit Return to Continue (22)"
! 136:
! 137: set logscale z
! 138: set hidden3d
! 139: set isosamples 60
! 140: set view 20,340,1,2
! 141: set xlabel "x"
! 142: set ylabel "y"
! 143: splot [-1.5:1.5] [-0.5:1.5] (1-x)**2 + 100*(y - x**2)**2
! 144: pause -1 "Hit Return to Continue (23)"
! 145: set contour
! 146: set nosurface
! 147: replot
! 148: pause -1 "Hit Return to Continue (24)"
! 149: #
! 150: # Clean up:
! 151: #
! 152: set nolog
! 153: set surface
! 154: set nocontour
! 155: set cntrparam levels 5
! 156: set cntrparam linear
! 157: set samples 100
! 158: set isosamples 10
! 159: set view 60,30,1,1
! 160: set xrange [-10:10]
! 161: set yrange [-10:10]
! 162: set zrange [-10:10]
! 163: set auto
! 164: set title "" 0,0
! 165: set xlabel "" 0,0
! 166: set ylabel "" 0,0
! 167: set zlabel "" 0,0
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