                    Appendix B: Examples

B.1 Demonstration of CURVE

            PROGRAM EXA_1
       C    USE DISLIN        for Fortran 90
            PARAMETER (N=301)
            DIMENSION XRAY(N),Y1RAY(N),Y2RAY(N)

            PI=3.1415926
            FPI=PI/180.
            STEP=360./(N-1)

            DO I=1,N
              XRAY(I)=(I-1)*STEP
              X=XRAY(I)*FPI
              Y1RAY(I)=SIN(X)
              Y2RAY(I)=COS(X)
            END DO

            CALL DISINI
            CALL PAGERA
            CALL COMPLX

            CALL AXSPOS(450,1800)
            CALL AXSLEN(2200,1200)

            CALL NAME('X-axis','X')
            CALL NAME('Y-axis','Y')

            CALL LABDIG(-1,'X')
            CALL TICKS(10,'XY')

            CALL TITLIN('Demonstration of CURVE',1)
            CALL TITLIN('SIN(X), COS(X)',3)

            CALL GRAF(0.,360.,0.,90.,-1.,1.,-1.,0.5)
            CALL TITLE

            CALL CURVE(XRAY,Y1RAY,N)
            CALL CURVE(XRAY,Y2RAY,N)

            CALL DASH
            CALL XAXGIT

            CALL DISFIN
            END

B.2 Symbols

            PROGRAM EXA_2
       C    USE DISLIN        for Fortran 90
            CHARACTER*20 CTIT,CSTR*2
            CTIT='Symbols'

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL COMPLX
            CALL PAGERA
            CALL PAGHDR('H. Michels  (',')',2,0)

            CALL HEIGHT(60)

            NL=NLMESS(CTIT)
            CALL MESSAG(CTIT,(2100-NL)/2,200)

            CALL HEIGHT(50)
            CALL HSYMBL(120)

            NY=150

            DO I=0,21
              IF(MOD(I,4).EQ.0) THEN
                NY=NY+400
                NXP=550
              ELSE
                NXP=NXP+350
              END IF

              IF(I.LT.10) THEN
                WRITE(CSTR,'(I1)') I
              ELSE
                WRITE(CSTR,'(I2)') I
              END IF

              NL=NLMESS(CSTR)/2
              CALL MESSAG(CSTR,NXP-NL,NY+150)
              CALL SYMBOL(I,NXP,NY)
            END DO

            CALL DISFIN
            END

B.3 Logarithmic Scaling

            PROGRAM EXA_3
       C    USE DISLIN        for Fortran 90
            CHARACTER*60 CTIT,CLAB(3)*5
            DATA CLAB/'LOG','FLOAT','ELOG '/

            CTIT='Logarithmic Scaling'

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL COMPLX
            CALL AXSLEN(1400,500)

            CALL NAME('X-axis','X')
            CALL NAME('Y-axis','Y')
            CALL AXSSCL('LOG','XY')

            CALL TITLIN(CTIT,2)

            DO I=1,3
              NYA=2650-(I-1)*800
              CALL LABDIG(-1,'XY')
              IF(I.EQ.2)THEN
                CALL LABDIG(1,'Y')
                CALL NAME(' ','X')
              END IF

              CALL AXSPOS(500,NYA)
              CALL MESSAG('Labels: '//CLAB(I),600,NYA-400)
              CALL LABELS(CLAB(I),'XY')
              CALL GRAF(0.,3.,0.,1.,-1.,2.,-1.,1.)

              IF(I.EQ.3) THEN
                CALL HEIGHT(50)
                CALL TITLE
              END IF

              CALL ENDGRF
            END DO

            CALL DISFIN
            END

B.4 Interpolation Methods

            PROGRAM EXA_4
       C    USE DISLIN        for Fortran 90

            DIMENSION X(16), Y(16)
            CHARACTER*8 CPOL(6),CTIT*60

            DATA X/0.,1.,3.,4.5,6.,8.,9.,11.,12.,12.5,13.,
           *       15.,16.,17.,19.,20./
           * Y/2.,4.,4.5,3.,1.,7.,2.,3.,5.,2.,2.5,2.,4.,6.,
           *   5.5,4./
           * CPOL/'SPLINE','STEM','BARS','STAIRS',
           *      'STEP','LINEAR'/ NYA/2700/

            CTIT='Interpolation Methods'

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL COMPLX
            CALL INCMRK(1)
            CALL HSYMBL(25)
            CALL TITLIN(CTIT,1)
            CALL AXSLEN(1500,350)
            CALL SETGRF('LINE','LINE','LINE','LINE')

            DO I=1,6
              CALL AXSPOS(350,NYA-(I-1)*350)
              CALL POLCRV(CPOL(I))
              CALL MARKER(0)

              CALL GRAF(0.,20.,0.,5.,0.,10.,0.,5.)
              NX=NXPOSN(1.)
              NY=NYPOSN(8.)
              CALL MESSAG(CPOL(I),NX,NY)
              CALL CURVE(X,Y,16)

              IF(I.EQ.6) THEN
                CALL HEIGHT(50)
                CALL TITLE
              END IF
              CALL ENDGRF
            END DO

            CALL DISFIN
            END

B.5 Line Styles

            PROGRAM EXA_5
       C    USE DISLIN        for Fortran 90
            DIMENSION X(2),Y(2)
            CHARACTER*6 CTYP(8)
            DATA X/3.,9./,
     *           CTYP/'SOLID','DOT','DASH','CHNDSH',
     *                'CHNDOT','DASHM','DOTL','DASHL'/

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL COMPLX
            CALL CENTER
            CALL CHNCRV('LINE')

            CALL NAME('X-axis','X')
            CALL NAME('Y-axis','Y')

            CALL TITLIN('Demonstration of CURVE',1)
            CALL TITLIN('Line Styles',3)

            CALL GRAF(0.,10.,0.,2.,0.,10.,0.,2.)
            CALL TITLE

            DO I=1,8
              Y(1)=9.5-I
              Y(2)=9.5-I
              NY=NYPOSN(Y(1))
              NX=NXPOSN(1.0)
              CALL MESSAG(CTYP(I),NX,NY-20)
              CALL CURVE(X,Y,2)
            END DO

            CALL DISFIN
            END

B.6 Legends

            PROGRAM EXA_6
       C    USE DISLIN        for Fortran 90
            PARAMETER(N=301)
            DIMENSION XRAY(N),Y1RAY(N),Y2RAY(N)
            CHARACTER*14 CBUF

            FPI=3.1415926/180.
            STEP=360./(N-1)
            DO I=1,N
              XRAY(I)=(I-1)*STEP
              X=XRAY(I)*FPI
              Y1RAY(I)=SIN(X)
              Y2RAY(I)=COS(X)
            END DO

            CALL DISINI
            CALL PAGERA
            CALL COMPLX
            CALL AXSPOS(450,1800)
            CALL AXSLEN(2200,1200)

            CALL NAME('X-axis','X')
            CALL NAME('Y-axis','Y')
            CALL TITLIN('Demonstration of CURVE',1)
            CALL TITLIN('Legend',3)
            CALL LABDIG(-1,'X')
            CALL TICKS(10,'XY')

            CALL GRAF(0.,360.,0.,90.,-1.,1.,-1.,0.5)
            CALL TITLE
            CALL XAXGIT

            CALL CHNCRV('LINE')
            CALL CURVE(XRAY,Y1RAY,N)
            CALL CURVE(XRAY,Y2RAY,N)

            CALL LEGINI(CBUF,2,7)    ! Legend statements
            NX=NXPOSN(190.)
            NY=NYPOSN(0.75)
            CALL LEGPOS(NX,NY)
            CALL LEGLIN(CBUF,'sin (x)',1)
            CALL LEGLIN(CBUF,'cos (x)',2)
            CALL LEGTIT('Legend')
            CALL LEGEND(CBUF,3)

            CALL DISFIN
            END

B.7 Shading Patterns (AREAF)

            PROGRAM EXA_7
       C    USE DISLIN        for Fortran 90
            DIMENSION IXP(4),IYP(4),IX(4),IY(4)
            CHARACTER*60 CTIT,CSTR*2
            DATA IX/0,300,300,0/IY/0,0,400,400/

            CTIT='Shading Patterns (AREAF)'

            CALL DISINI
            CALL PAGERA
            CALL COMPLX

            CALL HEIGHT(50)
            NL=NLMESS(CTIT)
            NX=(2970-NL)/2
            CALL MESSAG(CTIT,NX,200)

            NX0=335
            NY0=350

            DO I=1,3
              NY=NY0+(I-1)*600
              DO J=1,6
                NX=NX0+(J-1)*400
                II=(I-1)*6+J-1
                CALL SHDPAT(II)
                WRITE(CSTR,'(I2)') II

                DO K=1,4
                  IXP(K)=IX(K)+NX
                  IYP(K)=IY(K)+NY
                END DO
                CALL AREAF(IXP,IYP,4)

                NL=NLMESS(CSTR)
                NX=NX+(300-NL)/2
                CALL MESSAG(CSTR,NX,NY+460)
              END DO
            END DO

            CALL DISFIN
            END

B.8 Vectors

            PROGRAM EXA_8
       C    USE DISLIN        for Fortran 90
            DIMENSION IVEC(20)
            CHARACTER*60 CTIT,CNUM*4
            DATA IVEC/0,1111,1311,1421,1531,1701,1911,
           *          3111,3311,3421,3531,3703,4221,4302,
           *          4413,4522,4701,5312,5502,5703/

            CTIT='Vectors'

            CALL DISINI
            CALL PAGERA
            CALL COMPLX

            CALL HEIGHT(60)
            NL=NLMESS(CTIT)
            NX=(2970-NL)/2
            CALL MESSAG(CTIT,NX,200)

            CALL HEIGHT(50)
            NX=300
            NY=400

            DO I=1,20
              IF(I.EQ.11) THEN
                NX=NX+2970/2
                NY=400
              END IF

              WRITE(CNUM,'(I4)') IVEC(I)
              NL=NLMESS(CNUM)
              CALL MESSAG(CNUM,NX-NL,NY-25 )

              CALL VECTOR(NX+100,NY,NX+1000,NY,IVEC(I))
              NY=NY+160
            END DO

            CALL DISFIN
            END

B.9 Shading Patterns (PIEGRF)

            PROGRAM EXA_9
       C    USE DISLIN        for Fortran 90
            DIMENSION XRAY(18)
            CHARACTER*60 CTIT,CBUF*36,CSTR*2
            DATA XRAY/18*1./

            CTIT='Shading Patterns (PIEGRF)'

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL COMPLX

            CALL AXSPOS(250,2700)
            CALL AXSLEN(1600,2200)
            CALL TITLIN(CTIT,3)
            CALL HEIGHT(50)

            CALL LEGINI(CBUF,18,2)

            DO I=1,18
              WRITE(CSTR,'(I2)') I-1
              CALL LEGLIN(CBUF,CSTR,I)
            END DO

            CALL LABELS('NONE','PIE')
            CALL PIEGRF(CBUF,1,XRAY,18)
            CALL TITLE

            CALL DISFIN
            END

B.10 3-D Bar Graph / 3-D Pie Chart

            PROGRAM EXA_10
      C     USE DISLIN         for Fortran 90!
            CHARACTER*80 CBUF
            REAL XRAY(5),Y1RAY(5),Y2RAY(5)
            INTEGER IC1RAY(5),IC2RAY(5)
            DATA XRAY/2.,4.,6.,8.,10./,Y1RAY/0.,0.,0.,0.,0./,
           *     Y2RAY/3.2,1.5,2.0,1.0,3.0/
            DATA IC1RAY/50,150,100,200,175/,
           *     IC2RAY/50,150,100,200,175/

            CALL METAFL('POST')
            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL HWFONT

            CALL TITLIN('3-D Bar Graph / 3-D Pie Chart', 2)
            CALL HTITLE(40)

            CALL SHDPAT(16)
            CALL AXSLEN(1500,1000)
            CALL AXSPOS(300,1400)

            CALL BARWTH(0.5)
            CALL BARTYP('3DVERT')
            CALL LABELS('SECOND','BARS')
            CALL LABPOS('OUTSIDE','BARS')
            CALL LABCLR(255,'BARS')
            CALL GRAF(0.,12.,0.,2.,0.,5.,0.,1.)
            CALL TITLE
            CALL COLOR('RED')
            CALL BARS(XRAY,Y1RAY,Y2RAY,5)
            CALL ENDGRF

            CALL SHDPAT(16)
            CALL LABELS('DATA','PIE')
            CALL LABCLR(255,'PIE')
            CALL CHNPIE('NONE')
            CALL PIECLR(IC1RAY,IC2RAY,5)
            CALL PIETYP('3D')
            CALL AXSPOS(300,2700)
            CALL PIEGRF(CBUF,0,Y2RAY,5)       
            CALL DISFIN
            END

B.11 Surface Plot (SURFUN)

            PROGRAM EXA_10
       C    USE DISLIN        for Fortran 90
            CHARACTER*60 CTIT1,CTIT2
            EXTERNAL ZFUN

            CTIT1='Surface Plot (SURFUN)'
            CTIT2='F(X,Y) = 2*SIN(X)*SIN(Y)'

            CALL SETPAG('DA4P')
            CALL DISINI
            CALL PAGERA
            CALL COMPLX

            CALL AXSPOS(200,2600)
            CALL AXSLEN(1800,1800)

            CALL NAME('X-axis','X')
            CALL NAME('Y-axis','Y')
            CALL NAME('Z-axis','Z')

            CALL TITLIN(CTIT1,2)
            CALL TITLIN(CTIT2,4)

            CALL VIEW3D(-5.,-5.,4.,'ABS')
            CALL GRAF3D(0.,360.,0.,90.,0.,360.,0.,90.,
           *                            -3.,3.,-3.,1.)
            CALL HEIGHT(50)
            CALL TITLE

            CALL SURFUN(ZFUN,1,10.,1,10.)

            CALL DISFIN
            END

            FUNCTION ZFUN(X,Y)
            FPI=3.14159/180.
            ZFUN=2*SIN(X*FPI)*SIN(Y*FPI)
            END

B.12 Map Plot

            PROGRAM EXA_11
       C    USE DISLIN        for Fortran 90
            DIMENSION XC(9),YC(9)
            CHARACTER*12 CSTR(9)

            DATA XC/-22.,18.,37.5,0.,2.5,12.5,23.5,-3.75,
           *        14.25/,
           *     YC/64.,59.6,56.,51.5,48.5,42.,38.,40.3,
           *        50.1/,
           *   CSTR/'Reykjavik','Stockholm','Moskau',
           *        'London','Paris','Rom','Athen','Madrid',
           *        'Prag'/

            CALL METAFL('POST')
            CALL DISINI
            CALL PAGERA
            CALL HWFONT

            CALL AXSPOS(500,1850)
            CALL AXSLEN(2200,1400)

            CALL LABDIG(-1,'xy')
            CALL TICKS(1,'xy')
            CALL NAME('Longitude','x')
            CALL NAME('Latitude','y')

            CALL TITLIN('Map Plot',3)
            CALL INCMRK(-1)

            CALL LABELS('MAP','xy')
            CALL PROJCT('LAMBERT')
            CALL FRAME(3)
            CALL GRAFMP(-40.,60.,-40.,20.,35.,70.,40.,10.)

            CALL WORLD
            CALL CURVMP(XC,YC,9)

            DO I=1,9
              CALL POS2PT(XC(I),YC(I),XP,YP)
              NXP=XP+30
              NYP=YP
              CALL MESSAG(CSTR(I),NXP,NYP)
            END DO

            CALL GRIDMP(1,1)

            CALL HEIGHT(50)
            CALL TITLE
            CALL DISFIN
            END
