87 lines
1.7 KiB
QBasic
87 lines
1.7 KiB
QBasic
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SUB CROSSPLOT(NP AS INTEGER, XARRAY(1) AS DOUBLE, YARRAY(1) AS DOUBLE)
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DIM LEFT, RIGHT, TOP, BOTTOM AS INTEGER
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DIM NX, NY AS INTEGER
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DIM W, H AS INTEGER
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DIM XDELTA, YDELTA AS DOUBLE
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DIM XPOS, YPOS AS DOUBLE
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DIM I AS INTEGER
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DIM S AS STRING
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DIM BORDER AS INTEGER
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BORDER = 40
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TOP = BORDER
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BOTTOM = SCREENHEIGHT() - BORDER * 2
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LEFT = BORDER
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RIGHT = SCREENWIDTH() - BORDER * 2
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SETCOLOR 0,0,0
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CLS
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SETCOLOR 255,255,0
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NX = 10
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NY = 10
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XDELTA = DOUBLE(RIGHT - LEFT) / DOUBLE(NX)
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YDElTA = DOUBLE(BOTTOM - TOP) / DOUBLE(NY)
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FOR I=0 TO NX
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XPOS = DOUBLE(LEFT) + DOUBLE(I) * XDELTA
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DRAWLINE XPOS, TOP, XPOS, BOTTOM
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END FOR
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FOR I=0 TO NY
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YPOS = DOUBLE(TOP) + DOUBLE(I) * YDELTA
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DRAWLINE LEFT, YPOS, RIGHT, YPOS
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END FOR
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S = "0.0"
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W = STRINGWIDTH(S)+1
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H = STRINGHEIGHT(S)+1
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DRAWSTRING S,LEFT-W,BOTTOM
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DRAWSTRING S,LEFT,BOTTOM+H
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S = "1.0"
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W = STRINGWIDTH(S)+1
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H = STRINGHEIGHT(S)+1
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DRAWSTRING S,LEFT-W,TOP+H
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DRAWSTRING S,RIGHT-W,BOTTOM+H
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S = "Y-Axis"
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W = STRINGWIDTH(S)+1
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H = STRINGHEIGHT(S)+1
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DRAWSTRING S,LEFT-W,TOP+(BOTTOM-TOP-H)/2
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S = "X-Axis"
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W = STRINGWIDTH(S)+1
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H = STRINGHEIGHT(S)+1
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DRAWSTRING S,LEFT+(RIGHT-LEFT-W)/2,BOTTOM+H
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SETCOLOR 255,255,255
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FOR I=1 TO NP
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XPOS = DOUBLE(LEFT) + XARRAY(I) * DOUBLE(RIGHT - LEFT)
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YPOS = DOUBLE(TOP) + YARRAY(I) * DOUBLE(BOTTOM - TOP)
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PLOT XPOS, YPOS
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END FOR
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END SUB
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SUB MAIN
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DIM XARRAY(500), YARRAY(500) AS DOUBLE
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DIM NP AS INTEGER
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DIM I AS INTEGER
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NP = 500
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FOR I=1 TO NP
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XARRAY(I) = RND(0.0)
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YARRAY(I) = RND(0.0)
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END FOR
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GRAPHICS
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CALL CROSSPLOT(NP, XARRAY, YARRAY)
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REPAINT
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SLEEP 5000
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END SUB
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