DISLIN Examples / Visual Basic

Demonstration of CURVE / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 300
  Dim xray([N]), y1ray([N]), y2ray([N]) As Single
  Dim x, stp, fpi As Single
  Dim i, ic As Integer

  fpi = 3.1415926f / 180
  stp = 360.0f / ([N])
  
  For i = 0 To [N]
    xray(i) = i * stp
    x = xray(i) * fpi
    y1ray(i) =  Math.Sin (x)
    y2ray(i) =  Math.Cos (x)
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("xwin")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()

  dislin.axspos (450, 1800)
  dislin.axslen (2200, 1200)

  dislin.name   ("X-axis", "X")
  dislin.name   ("Y-axis", "Y")

  dislin.labdig (-1, "X")
  dislin.ticks (10, "Y")
  dislin.ticks (9, "X")

  dislin.titlin ("Demonstration of CURVE", 1)
  dislin.titlin ("SIN(X), COS(X)", 3)

  ic = dislin.intrgb  (0.95, 0.95, 0.95)
  dislin.axsbgd (ic)

  dislin.graf   (0.0f, 360.0f, 0.0f, 90.0f, -1.0f, 1.0f, -1.0f, 0.5f)
  dislin.setrgb (0.7, 0.7, 0.7)
  dislin.grid (1, 1)

  dislin.color ("fore")
  dislin.title  ()

  dislin.color  ("red")
  dislin.curve  (xray, y1ray, [N] + 1)
  dislin.color  ("green")
  dislin.curve  (xray, y2ray, [N] + 1)

  dislin.color  ("fore")
  dislin.disfin ()

  End Sub
End Class


Polar Plots / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Dim n As Integer = 300 - 1
  Dim m As Integer = 10 - 1
  Dim pi As Single = 3.1415926
  Dim xray (n), x1(n), y1 (n) As Single
  Dim x2 (m), y2 (m) As Single
  Dim a, x, f, stp As Single
  Dim i, ic As Integer

  f = pi / 180.0
  stp = 360.0 / n
  For i = 0 To n
    a = i * stp * f 
    xray(i) = i * stp
    x = xray(i) * f
    y1(i) = a
    x1(i) = Math.Sin (5 * a)
  Next i

  For i = 0 To m
    x2(i) = i + 1
    y2(i) = i + 1
  Next i

  dislin.setpag ("da4p")
  dislin.metafl ("cons")
  dislin.scrmod ("revers")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin ("Polar Plots", 2)
  dislin.ticks  (3, "Y")
  dislin.axends ("NOENDS", "X")
  dislin.labdig (-1, "Y")
  dislin.axslen (1000, 1000)
  dislin.axsorg (1050, 900)

  ic = dislin.intrgb (0.95, 0.95, 0.95)
  dislin.axsbgd (ic)

  dislin.grafp  (1.0, 0.0, 0.2, 0.0, 30.0)
  dislin.color  ("blue")
  dislin.curve  (x1, y1, n)
  dislin.color  ("fore")
  dislin.htitle (50)
  dislin.title  ()
  dislin.endgrf ()

  dislin.labdig (-1, "X")
  dislin.axsorg (1050, 2250)
  dislin.labtyp ("VERT", "Y")
  dislin.grafp  (10.0, 0.0, 2.0, 0.0, 30.0)
  dislin.barwth (-5.0)
  dislin.polcrv ("FBARS")
  dislin.color  ("blue")
  dislin.curve  (x2, y2, m)
  dislin.disfin ()

  End Sub
End Class



Symbols / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim ctit As String = "Symbols"
  Dim i, nl, ny, nxp As Integer 
  Dim v As Single

  dislin.scrmod ("revers")
  dislin.setpag ("da4p")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.height (60)
  nl = dislin.nlmess (ctit)
  dislin.messag (ctit, (2100 - nl)/2, 200)

  dislin.height (50)
  dislin.hsymbl (120)

  ny = 150
  For i = 0 To 23
    If (i Mod 4) = 0 Then
      ny += 400
      nxp = 550
    Else
      nxp += 350
    End If
    v = i
    nl = dislin.nlnumb (v, -1)
    dislin.number (v, -1, nxp - nl/2, ny + 150)
    dislin.symbol (i, nxp, ny)
  Next i
  dislin.disfin ()

  End Sub
End Class

Interpolation Methods / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Dim xray () As Single = {0.0, 1.0, 3.0, 4.5, 6.0, 8.0, 9.0, 11.0, 12.0, _
                           12.5, 13.0, 15.0, 16.0, 17.0, 19.0, 20.0}
  Dim yray () As Single = {2.0, 4.0, 4.5, 3.0, 1.0, 7.0, 2.0, 3.0, 5.0,   _
                           2.0, 2.5, 2.0, 4.0, 6.0, 5.5, 4.0}
  Dim ctit As String = "Interpolation Methods"
  Dim cpol () As String = {"SPLINE", "STEM", "BARS", "STAIRS", "STEP", _
                           "LINEAR"}
  Dim ic, i, nya, nx, ny As Integer

  dislin.setpag ("da4p")
  dislin.scrmod ("reverse")
  dislin.metafl ("xwin")

  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()

  dislin.incmrk (1)
  dislin.hsymbl (25)
  dislin.titlin (ctit, 1)
  dislin.axslen (1500, 350)
  dislin.setgrf ("LINE", "LINE", "LINE", "LINE")

  ic = dislin.intrgb (1.0, 1.0, 0.0)
  dislin.axsbgd (ic)

  nya = 2700
  For i = 0 To 5
    dislin.axspos (350, nya - i * 350)
    dislin.polcrv (cpol(i))
    dislin.marker (0)
    dislin.graf   (0.0, 20.0, 0.0, 5.0, 0.0, 10.0, 0.0, 5.0)
    nx = dislin.nxposn (1.0)
    ny = dislin.nyposn (8.0)
    dislin.messag (cpol(i), nx, ny)
    dislin.color  ("red")
    dislin.curve  (xray, yray, 16)
    dislin.color  ("fore")

    If i = 5 Then 
      dislin.height (50)
      dislin.title ()
    End If
    dislin.endgrf ()
  Next i
  dislin.disfin ()

  End Sub
End Class

Bar Graphs / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim cbuf As New StringBuilder (80)
  Dim x () As Single = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0}
  Dim y () As Single = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}
  Dim y1 () As Single = {1.0, 1.5, 2.5, 1.3, 2.0, 1.2, 0.7, 1.4, 1.1}
  Dim y2 () As Single = {2.0, 2.7, 3.5, 2.1, 3.2, 1.9, 2.0, 2.3, 1.8}
  Dim y3 () As Single = {4.0, 3.5, 4.5, 3.7, 4.0, 2.9, 3.0, 3.2, 2.6}
  Dim nya As Integer = 2700
  Dim i As Integer
  Dim ctit As String = "Bar Graphs (BARS)"

  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()
  dislin.ticks  (1, "x")
  dislin.intax  ()
  dislin.axslen (1600, 700)
  dislin.titlin (ctit, 3)

  dislin.legini (cbuf, 3, 8)
  dislin.leglin (cbuf, "FIRST", 1)
  dislin.leglin (cbuf, "SECOND", 2)
  dislin.leglin (cbuf, "THIRD", 3)
  dislin.legtit (" ")
  dislin.shdpat (5)

  For i = 1 To 3
    If i > 1 Then
      dislin.labels ("none","x")
    End If

    dislin.axspos (300, nya-(i-1)*800)
    dislin.graf (0.0, 10.0, 0.0, 1.0, 0.0, 5.0, 0.0, 1.0)

    If i = 1 Then
      dislin.bargrp (3, 0.15)
      dislin.color  ("red")
      dislin.bars   (x, y, y1, 9)
      dislin.color  ("green")
      dislin.bars   (x, y, y2, 9)
      dislin.color  ("blue")
      dislin.bars   (x, y, y3, 9)
      dislin.color  ("fore")
      dislin.reset  ("bargrp")
    ElseIf i = 2 Then
      dislin.height (30)
      dislin.labels ("delta","bars")
      dislin.labpos ("center","bars")
      dislin.color  ("red")
      dislin.bars   (x, y, y1, 9)
      dislin.color  ("green")
      dislin.bars   (x, y1, y2, 9)
      dislin.color  ("blue")
      dislin.bars   (x, y2, y3, 9)
      dislin.color  ("fore")
      dislin.reset  ("height") 
    ElseIf i = 3 Then
      dislin.labels ("second", "bars")
      dislin.labpos ("outside", "bars")
      dislin.color  ("red")
      dislin.bars   (x, y, y1, 9)
      dislin.color  ("fore")
    End If

    If i <> 3 Then
      dislin.legend (cbuf, 7)
    End If

    If i = 3 Then
      dislin.height (50)
      dislin.title  ()
    End If

    dislin.endgrf ()
  Next i

  dislin.disfin ()
  End Sub
End Class

Pie Charts / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim xray () As Single = {1.0, 2.5, 2.0, 2.7, 1.8}
  Dim ctit As String = "Pie Charts (PIEGRF)"
  Dim cbuf As New StringBuilder (80)

  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()
  dislin.chnpie ("BOTH")

  dislin.axslen (1600, 1000)
  dislin.titlin (ctit, 2)

  dislin.legini (cbuf, 5, 8)
  dislin.leglin (cbuf, "FIRST",  1)
  dislin.leglin (cbuf, "SECOND", 2)
  dislin.leglin (cbuf, "THIRD",  3)
  dislin.leglin (cbuf, "FOURTH", 4)
  dislin.leglin (cbuf, "FIFTH",  5)

  dislin.patcyc (1, 7)
  dislin.patcyc (2, 4)
  dislin.patcyc (3, 13)
  dislin.patcyc (4, 3)
  dislin.patcyc (5, 5)

  dislin.axspos (250, 2800)
  dislin.piegrf (cbuf.ToString (), 1, xray, 5)
  dislin.endgrf ()

  dislin.axspos (250, 1600)
  dislin.labels ("DATA", "PIE")
  dislin.labpos ("EXTERNAL", "PIE")
  dislin.piegrf (cbuf.ToString (), 1, xray, 5)

  dislin.height (50)
  dislin.title  ()
  dislin.disfin ()

  End Sub
End Class

3-D Bar Graph / 3-D Pie Chart / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim xray () As Single = {2.0, 4.0, 6.0, 8.0, 10.0}
  Dim y1ray () As Single = {0.0, 0.0, 0.0, 0.0, 0.0}
  Dim y2ray () As Single = {3.2, 1.5, 2.0, 1.0, 3.0}
  Dim ic1ray () As Integer = {50, 150, 100, 200, 175}
  Dim ic2ray () As Integer = {50, 150, 100, 200, 175}
  Dim cbuf As New StringBuilder (80)

  dislin.metafl ("cons")
  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin ("3-D Bar Graph / 3-D Pie Chart", 2)
  dislin.htitle (40)

  dislin.shdpat (16)
  dislin.axslen (1500, 1000)
  dislin.axspos (300, 1400)

  dislin.barwth (0.5)
  dislin.bartyp ("3dvert")
  dislin.labels ("second", "bars")
  dislin.labpos ("outside", "bars")
  dislin.labclr (255, "bars")
  dislin.graf   (0.0, 12.0, 0.0, 2.0, 0.0, 5.0, 0.0, 1.0)
  dislin.title  ()
  dislin.color  ("red")
  dislin.bars   (xray, y1ray, y2ray, 5)
  dislin.endgrf ()

  dislin.shdpat (16)
  dislin.labels ("data", "pie")
  dislin.labclr (255, "pie")
  dislin.chnpie ("none")
  dislin.pieclr (ic1ray, ic2ray, 5)
  dislin.pietyp ("3d")
  dislin.axspos (300, 2700)
  dislin.piegrf (cbuf.ToString (), 0, y2ray, 5)  
  dislin.disfin ()

  End Sub
End Class

3-D Bars / BARS3D / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim n As Integer = 17
  Dim xray () As Single = {1.0, 3.0, 8.0, 1.5, 9.0, 6.3, 5.8, 2.3, 8.1, 3.5, _
			   2.2, 8.7, 9.2, 4.8, 3.4, 6.9, 7.5, 3.8}
  Dim yray () As Single = {5.0, 8.0, 3.5, 2.0, 7.0, 1.0,4.3, 7.2, 6.0, 8.5,  _
			   4.1, 5.0, 7.3, 2.8, 1.6, 8.9, 9.5, 3.2}
  Dim z1ray () As Single = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,     _ 
     		            0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}
  Dim z2ray () As Single = {4.0, 5.0, 3.0, 2.0, 3.5, 4.5, 2.0, 1.6, 3.8,     _
		            4.7, 2.1, 3.5, 1.9, 4.2, 4.9, 2.8, 3.6, 4.3}
  Dim icray () As Integer = {30, 30, 30, 30, 30, 30, 100, 100, 100, 100,     _
			    100, 100, 170, 170, 170, 170, 170, 170}
  Dim xwray (17), ywray (17) As Single
  Dim cbuf As New StringBuilder (80)
  Dim i As Integer

  For i = 0 To n
    xwray(i) = 0.5
    ywray(i) = 0.5
  Next i

  dislin.metafl ("xwin")
  dislin.scrmod ("revers")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.hwfont ()
  dislin.pagera ()

  dislin.axspos (200, 2600)
  dislin.axslen (1800, 1800)

  dislin.name   ("X-axis", "X")
  dislin.name   ("Y-axis", "Y")
  dislin.name   ("Z-axis", "Z")

  dislin.titlin ("3-D Bars / BARS3D",3)
  dislin.labl3d ("hori")

  dislin.graf3d (0.0,10.0,0.0,2.0,0.0,10.0,0.0,2.0,0.0,5.0,0.0,1.0)
  dislin.grid3d (1,1, "bottom")

  dislin.bars3d (xray, yray, z1ray, z2ray, xwray, ywray, icray, n + 1)

  dislin.legini (cbuf, 3, 20)
  dislin.legtit (" ")
  dislin.legpos (1350, 1150)
  dislin.leglin (cbuf, "First", 1)
  dislin.leglin (cbuf, "Second", 2)
  dislin.leglin (cbuf, "Third", 3)
  dislin.legend (cbuf, 3)

  dislin.height (50)
  dislin.title  ()
  dislin.disfin ()

  End Sub
End Class

Shading Patterns / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Dim ix ()  As Integer = {0, 300, 300,   0}
  Dim iy ()  As Integer = {0,   0, 400, 400}
  Dim ixp () As Integer = {0, 0, 0, 0}
  Dim iyp () As Integer = {0, 0, 0, 0}
  Dim ctit As String = "Shading patterns (AREAF)"
  Dim i, j, k, ii, nl, nx0, ny0, iclr, nx, ny As Integer
  Dim v As Single

  dislin.metafl ("cons")
  dislin.scrmod ("revers")
  dislin.disini ()
  dislin.setvlt ("small")
  dislin.pagera ()
  dislin.complx ()

  dislin.height (50)
  nl = dislin.nlmess (ctit)
  dislin.messag (ctit, (2970 - nl)/2, 200)

  nx0 = 335
  ny0 = 350

  iclr = 0
  For  i = 0 To 2
    ny = ny0 + i * 600
    For j = 0 To 5
      nx = nx0 + j * 400
      ii = i * 6 + j
      dislin.shdpat (ii)
      iclr = iclr Mod 8
      iclr = iclr + 1
      dislin.setclr (iclr)
      For k = 0 To 3
        ixp(k) = ix(k) + nx
        iyp(k) = iy(k) + ny
      Next k

      dislin.areaf (ixp, iyp, 4)
      nl = dislin.nlnumb (ii, -1)
      nx += (300 - nl) / 2
      dislin.color ("foreground")
      v = ii
      dislin.number (v, -1, nx, ny + 460) 
    Next j
  Next i
  dislin.disfin ()

  End Sub
End Class

3-D Colour Plot / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 100
  Dim zmat(100,100) As Single
  Dim x, y, stp, fpi As Single
  Dim i, j As Integer

  fpi = 3.1415926f / 180
  stp = 360.0f / [N]
  
  For i = 0 To [N]
    x = i * stp
    For j = 0 To [N]
      y = j * stp
      zmat (i,j) = 2 * Math.Sin (x * fpi) * Math.Sin (y * fpi)
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("xwin")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin ("3-D Colour Plot of the Function", 1)
  dislin.titlin ("F(X,Y) = 2 * SIN(X) * SIN(Y)", 3)
  dislin.name ("X-axis", "X")
  dislin.name ("Y-axis", "Y")
  dislin.name ("Z-axis", "Z")

  dislin.axspos (300, 1850)
  dislin.ax3len (2200, 1400, 1400)

  dislin.intax ()    
  dislin.autres (n, n)
  dislin.graf3 (0.0f, 360.0f, 0.0f, 90.0f, 0.0f, 360.0f, 0.0f, 90.0f, _
                -2.0f, 2.0f, -2.0f, 1.0f)
  dislin.crvmat (zmat, [N] + 1, [N] + 1, 1, 1) 

  dislin.height (50)
  dislin.title ()
  dislin.disfin ()

  End Sub
End Class

Surface Plot / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 50
  Dim zmat([N],[N]) As Single
  Dim x, y, stp, fpi As Single
  Dim i, j As Integer

  fpi = 3.1415926f / 180
  stp = 360.0f / [N]
  
  For i = 0 To [N]
    x = i * stp
    For j = 0 To [N]
      y = j * stp
      zmat (i,j) = 2 * Math.Sin (x * fpi) * Math.Sin (y * fpi)
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("xwin")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin ("Surface Plot of the Function", 2)
  dislin.titlin ("F(X,Y) = 2 * SIN(X) * SIN(Y)", 4)

  dislin.axspos (200, 2600)
  dislin.axslen (1800, 1800)

  dislin.name ("X-axis", "X")
  dislin.name ("Y-axis", "Y")
  dislin.name ("Z-axis", "Z")

  dislin.view3d (-5.0f, -5.0f, 4.0f, "ABS")
  dislin.graf3d (0.0f, 360.0f, 0.0f, 90.0f, 0.0f, 360.0f, 0.0f, 90.0f, _
        -3.0f, 3.0f, -3.0f, 1.0f)
  dislin.height (50)
  dislin.title ()

  dislin.color ("green")
  dislin.surmat (zmat, [N] + 1, [N] + 1, 1, 1) 
  dislin.disfin ()

  End Sub
End Class

Shaded Surface Plot / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 50
  Const [M] As Integer = 50
  Dim xray([N]) As Single
  Dim yray([M]) As Single
  Dim zmat([N],[M]) As Single
  Dim stpx, stpy, fpi As Single
  Dim i, j As Integer

  fpi = 3.1415926f / 180
  stpx = 360.0f / [N]
  stpy = 360.0f / [M]
  
  For i = 0 To [N]
    xray (i) = i * stpx
    For j = 0 To [M]
      yray (j) = j * stpy
      zmat (i,j) = 2 * Math.Sin (xray(i) * fpi) * Math.Sin (yray(j) * fpi)
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("xwin")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin ("Surface Plot of the Function", 2)
  dislin.titlin ("F(X,Y) = 2 * SIN(X) * SIN(Y)", 4)

  dislin.axspos (200, 2600)
  dislin.axslen (1800, 1800)

  dislin.name ("X-axis", "X")
  dislin.name ("Y-axis", "Y")
  dislin.name ("Z-axis", "Z")

  dislin.view3d (-5.0f, -5.0f, 4.0f, "ABS")
  dislin.graf3d (0.0f, 360.0f, 0.0f, 90.0f, 0.0f, 360.0f, 0.0f, 90.0f, _
        -3.0f, 3.0f, -3.0f, 1.0f)
  dislin.height (50)
  dislin.title ()

  dislin.shdmod ("smooth", "surface")
  dislin.surshd (xray, [N] + 1, yray, [M] + 1, zmat) 
  dislin.disfin ()

  End Sub
End Class

Contour Plot / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 60
  Const [M] As Integer = 50
  Dim xray([N]) As Single
  Dim yray([M]) As Single
  Dim zmat([N],[M]) As Single
  Dim stpx, stpy, fpi As Single
  Dim ctit1 As String = "Contour Plot"
  Dim ctit2 As String = "F(X,Y) = 2 * SIN(X) * SIN (Y)"
  Dim zlev As Single
  Dim i, j As Integer

  fpi = 3.1415926f / 180
  stpx = 360.0f / [N]
  stpy = 360.0f / [M]
  
  For i = 0 To [N]
    xray (i) = i * stpx
    For j = 0 To [M]
      yray (j) = j * stpy
      zmat (i,j) = 2 * Math.Sin (xray(i) * fpi) * Math.Sin (yray(j) * fpi)
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()

  dislin.titlin (ctit1, 2)
  dislin.titlin (ctit2, 4)

  dislin.axspos (450, 2670)

  dislin.intax  ()
  dislin.name   ("X-axis", "X")
  dislin.name   ("Y-axis", "Y")
  dislin.graf  (0.0, 360.0, 0.0, 90.0, 0.0, 360.0, 0.0, 90.0)

  dislin.height (30)
  For i = 0 To 8
    zlev = -2.0 + i * 0.5 
    If i = 4 then
      dislin.labels ("NONE", "CONTUR")
    Else
      dislin.labels ("FLOAT", "CONTUR")
    End If
    dislin.setclr ((i+1) * 28)
    dislin.contur (xray, n + 1, yray, m + 1, zmat, zlev)
  Next i

  dislin.color  ("FORE")
  dislin.height (50)
  dislin.title  ()
  dislin.disfin ()

  End Sub
End Class

Shaded Contour Plot / Visual Basic

Imports System
Imports System.Text

Public Class App
  Public Shared Sub Main ()

  Const [N] As Integer = 50
  Const [M] As Integer = 80
  Dim xray([N]) As Single
  Dim yray([M]) As Single
  Dim zmat([N],[M]) As Single
  Dim zlev(11) As Single
  Dim stpx, stpy, x, x2, y, y2 As Single
  Dim ctit1 As String = "Shaded Contour Plot"
  Dim ctit2 As String = "F(X,Y) = (X[2$ - 1)[2$ + (Y[2$ - 1)[2$"
  Dim i, j As Integer

  stpx = 1.6 / n
  stpy = 1.6 / n
  
  For i = 0 To [N]
    xray (i) = i * stpx
    x = xray (i) * xray (i) - 1.0
    x2 = x * x 
    For j = 0 To [M]
      yray (j) = j * stpy
      y = yray (j) * yray (j) - 1.0
      y2 = y * y
      zmat (i,j) = x2 + y2
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()
  dislin.mixalf ()

  dislin.titlin (ctit1, 2)
  dislin.titlin (ctit2, 4)

  dislin.axspos (450, 2670)

  dislin.name   ("X-axis", "X")
  dislin.name   ("Y-axis", "Y")
  dislin.shdmod ("poly", "contur")
  dislin.graf   (0.0, 1.6, 0.0, 0.2, 0.0, 1.6, 0.0, 0.2)

  For i = 0 To 11
    zlev(11-i) = 0.1 + i * 0.1
  Next i

  dislin.conshd (xray, n + 1, yray, m + 1, zmat, zlev, 12)

  dislin.height (50)
  dislin.title  ()
  dislin.disfin ()

  End Sub
End Class

Shaded Surface / Contour Plot / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Dim n As INTEGER = 50
  Dim m As INTEGER = 50
  Dim nlev As INTEGER = 19
  Dim x(n), y(m), zmat (n,m), zlev (nlev) As Single 
  Dim ctit1 As String = "Shaded Surface / Contour Plot"
  Dim ctit2 As String = "F(X,Y) = 2 * SIN(X) * SIN (Y)"
  Dim fpi, stpx, stpy, stp As Single
  Dim i, j As Integer

  fpi  = 3.1415927 / 180.0
  stpx = 360.0 / n
  stpy = 360.0 / m

  For i = 0 To n
    x(i) = i * stpx
    For j = 0 To m 
      y(j) = j * stpy
      zmat(i,j) = 2 * Math.Sin(x(i) * fpi) * Math.Sin(y(j) * fpi)
    Next j
  Next i

  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.setpag ("da4p")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()

  dislin.titlin (ctit1, 2)
  dislin.titlin (ctit2, 4)

  dislin.axspos (200, 2600)
  dislin.axslen (1800, 1800)

  dislin.name   ("X-axis", "X")
  dislin.name   ("Y-axis", "Y")
  dislin.name   ("Z-axis", "Z")

  dislin.graf3d  (0.0, 360.0, 0.0, 90.0, 0.0, 360.0, 0.0, 90.0, _
		 -2.0, 2.0, -2.0, 1.0)
  dislin.height (50)
  dislin.title  ()

  dislin.grfini (-1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0)
  dislin.nograf ()
  dislin.graf (0.0, 360.0, 0.0, 90.0, 0.0, 360.0, 0.0, 90.0)
  
  stp = 4.0 / nlev
  For i = 0 To nlev
    zlev(i) = -2.0 + i * stp 
  Next i
  dislin.conshd (x, n + 1, y, m + 1, zmat, zlev, nlev + 1)

  dislin.box2d ()
  dislin.reset ("nograf")
  dislin.grffin ()

  dislin.shdmod ("smooth", "surface")
  dislin.surshd (x, n + 1, y, m + 1, zmat)
  dislin.disfin ()

  End Sub
End Class

Spheres and Tubes / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Dim x () As Single = {10.0, 20.0, 10.0, 20.0, 5.0, 15.0, 25.0, 5.0, 15.0, _
                        25.0, 5.0, 15.0, 25.0, 10.0, 20.0, 10.0, 20.0}
  Dim y () As Single = {10.0, 10.0, 20.0, 20.0, 5.0, 5.0, 5.0, 15.0, 15.0,  _
                        15.0, 25.0, 25.0, 25.0, 10.0, 10.0, 20.0, 20.0}
  Dim z () As Single = {5.0, 5.0, 5.0, 5.0, 15.0, 15.0, 15.0, 15.0, 15.0,   _
                        15.0, 15.0, 15.0, 15.0, 25.0, 25.0, 25.0, 25.0}  
  Dim idx () As Integer = {1, 2, 1, 3, 3, 4, 2, 4, 5, 6, 6, 7, 8, 9, 9, 10, _
                        11, 12, 12, 13,  5, 8, 8, 11, 6, 9, 9, 12, 7, 10,   _
                        10, 13,  14, 15, 16, 17, 14, 16, 15, 17,            _
                        1, 5, 2, 7, 3, 11, 4, 13, 5, 14, 7, 15, 11, 16, 13, 17}
  Dim iret, i, j1, j2 As Integer

  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()
  dislin.light ("on")
  dislin.matop3 (0.02, 0.02, 0.02, "specular")

  dislin.clip3d ("none")
  dislin.axspos (0, 2500)
  dislin.axslen (2100, 2100)

  dislin.htitle (50)
  dislin.titlin ("Spheres and Tubes", 4)

  dislin.name ("X-axis", "x")
  dislin.name ("Y-axis", "y")
  dislin.name ("Z-axis", "z")

  dislin.labdig (-1, "xyz")
  dislin.labl3d ("hori")
  dislin.graf3d (0.0, 30.0, 0.0, 5.0, 0.0, 30.0, 0.0, 5.0, _
                 0.0, 30.0, 0.0, 5.0)
  dislin.title ()

  dislin.shdmod ("smooth", "surface")

  iret = dislin.zbfini ()
  dislin.matop3 (1.0, 0.0, 0.0, "diffuse")
  For i = 0 To 16
    dislin.sphe3d (x(i), y(i), z(i), 2.0, 50, 25)
  Next i

  dislin.matop3 (0.0, 1.0, 0.0, "diffuse")
  For i = 0 To 55 Step 2
    j1 = idx(i) - 1
    j2 = idx(i+1) - 1
    dislin.tube3d (x(j1), y(j1), z(j1),                _ 
                   x(j2), y(j2), z(j2), 0.5, 5, 5) 
  Next i

  dislin.zbffin ()
  dislin.disfin ()

  End Sub
End Class

Some Solids / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()
  Dim iret As Integer

  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.hwfont ()
  dislin.light ("on")
  dislin.litop3(1,0.5,0.5,0.5,"ambient")

  dislin.clip3d ("none")
  dislin.axspos (0, 2500)
  dislin.axslen (2100, 2100)

  dislin.htitle (60)
  dislin.titlin ("Some Solids", 4)

  dislin.nograf ()
  dislin.graf3d (-5.0, 5.0, -5.0, 2.0, -5.0, 5.0, -5.0, 2.0, _
                 -5.0, 5.0, -5.0, 2.0)
  dislin.title ()

  dislin.shdmod ("smooth", "surface") 
  iret = dislin.zbfini()
  dislin.matop3 (1.0, 0.5, 0.0, "diffuse")
  dislin.tube3d (-3.0, -3.0, 8.0, 2.0, 3.0, 5.5, 1.0, 40, 20) 

  dislin.rot3d (-60.0, 0.0, 0.0) 
  dislin.matop3 (1.0, 0.0, 1.0, "diffuse")
  dislin.setfce ("bottom")
  dislin.matop3 (1.0, 0.0, 0.0, "diffuse")
  dislin.cone3d (-3.0, -3.0, 3.5, 2.0, 3.0, 3.0, 40, 20)
  dislin.setfce ("top")

  dislin.rot3d (0.0, 0.0, 0.0) 
  dislin.matop3 (0.0, 1.0, 1.0, "diffuse")
  dislin.plat3d (4.0, 4.0, 3.0, 3.0, "icos")

  dislin.rot3d (0.0, 0.0, 0.0) 
  dislin.matop3 (1.0, 1.0, 0.0, "diffuse")
  dislin.sphe3d (0.0, 0.0, 0.0, 3.0, 40, 20)

  dislin.rot3d (0.0, 0.0, -20.0) 
  dislin.matop3 (0.0, 0.0, 1.0, "diffuse")
  dislin.quad3d (-4.0, -4.0, -3.0, 3.0, 3.0, 3.0)

  dislin.rot3d (0.0, 0.0, 30.0) 
  dislin.matop3 (1.0, 0.3, 0.3, "diffuse")
  dislin.pyra3d (-2.0, -5.0, -10.0, 3.0, 5.0, 5.0, 4)

  dislin.rot3d (0.0, 0.0, 0.0) 
  dislin.matop3 (1.0, 0.0, 0.0, "diffuse")
  dislin.torus3d (7.0, -3.0, -2.0, 1.5, 3.5, 1.5, 0.0, 360.0, 40, 20)
  dislin.rot3d (0.0, 90.0, 0.0) 

  dislin.matop3 (0.0, 1.0, 0.0, "diffuse")
  dislin.torus3d (7.0, -5.0, -2.0, 1.5, 3.5, 1.5, 0.0, 360.0, 40, 20)
  dislin.zbffin ()
  dislin.disfin ()

  End Sub
End Class

Map Plot / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()

  dislin.axspos (400, 1850)
  dislin.axslen (2400, 1400)

  dislin.name   ("Longitude", "X")
  dislin.name   ("Latitude",  "Y")
  dislin.titlin ("World Coastlines and Lakes", 3)

  dislin.labels ("MAP", "XY")
  dislin.labdig (-1, "XY")
  dislin.grafmp (-180.0f, 180.0f, -180.0f, 90.0f, _
                      -90.0f, 90.0f, -90.0f, 30.0f) 
  dislin.gridmp (1,1)
  dislin.color  ("green")
  dislin.world ()

  dislin.color  ("fore")
  dislin.height (50) 
  dislin.title ()
  dislin.disfin ()

  End Sub
End Class

TeX Instructions for Mathematical Formulas / Visual Basic

Imports System

Public Class App
  Public Shared Sub Main ()

  Dim ctit As String = "TeX Instructions for Mathematical Formulas"
  Dim nl As Integer
  
  dislin.setpag ("da4p")
  dislin.scrmod ("revers")
  dislin.metafl ("cons")
  dislin.disini ()
  dislin.pagera ()
  dislin.complx ()
  dislin.height (40)

  nl =   dislin.nlmess (ctit)
  dislin.messag (ctit, (2100 - nl)/2, 100)
  
  dislin.texmod ("on")
  dislin.messag ("$\frac{1}{x+y}$", 150, 400)
  dislin.messag ("$\frac{a^2 - b^2}{a+b} = a - b$", 1200, 400)
  
  dislin.messag ("$r = \sqrt{x^2 + y^2}$", 150, 700)
  dislin.messag ("$\cos \phi = \frac{x}{\sqrt{x^2 + y^2}}$", 1200, 700)

  dislin.messag ("$\Gamma(x) = \int_0^\infty e^{-t}t^{x-1}dt$", 150, 1000)
  dislin.messag ("$\lim_{x \to \infty} (1 + \frac{1}{x})^x = e$",   _
                1200, 1000)

  dislin.messag ("$\mu = \sum_{i=1}^n x_i p_i$", 150, 1300)
  dislin.messag ("$\mu = \int_{-\infty}^ \infty x f(x) dx$", 1200, 1300)

  dislin.messag ("$\overline{x} = \frac{1}{n} \sum_{i=1}^n x_i$", 150, 1600)
  dislin.messag ("$s^2 = \frac{1}{n-1} \sum_{i=1}^n (x_i - \overline{x})^2$", _
                1200, 1600)

  dislin.messag ("$\sqrt[n]{\frac{x^n - y^n}{1 + u^{2n}}}$", 150, 1900)  
  dislin.messag ("$\sqrt[3]{-q + \sqrt{q^2 + p^3}}", 1200, 1900)

  dislin.messag ("$\int \frac{dx}{1+x^2} = \arctan x + C$", 150, 2200)
  dislin.messag ("$\int \frac{dx}{\sqrt{1+x^2}} = {\rm arsinh} x + C",  _
                1200, 2200)

  dislin.messag ("$\overline{P_1P_2} = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$", _
                150,2500)
  dislin.messag ("$x = \frac{x_1 + \lambda x_2}{1 + \lambda}$", 1200, 2500)
  dislin.disfin ()

  End Sub
End Class
 
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