diff options
Diffstat (limited to 'grapheps.ps')
| -rw-r--r-- | grapheps.ps | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/grapheps.ps b/grapheps.ps index 95f200e..db3b8b1 100644 --- a/grapheps.ps +++ b/grapheps.ps @@ -185,10 +185,12 @@ plotdict begin /YSCL plotrect 3 get YRNG aload pop exch sub div def /XOFF XOFF plotrect 0 get XSCL div sub def /YOFF YOFF plotrect 1 get YSCL div sub def - /YTSCL plotrect 3 get YRNG aload pop exch sub find-tick-scale def - /YSTEP YTSCL 0 get 3 mod 0 eq {6} {8} ifelse 5 mul yuntrans def - /XTSCL plotrect 2 get XRNG aload pop exch sub find-tick-scale def - /XSTEP XTSCL 0 get 3 mod 0 eq {12} {10} ifelse 5 mul xuntrans def + /YTSCL plotrect 3 get YRNG aload pop exch sub abs find-tick-scale def + /YSTEP YTSCL 0 get 3 mod 0 eq {6} {8} ifelse 5 mul yuntrans + YSCL sign mul def + /XTSCL plotrect 2 get XRNG aload pop exch sub abs find-tick-scale def + /XSTEP XTSCL 0 get 3 mod 0 eq {12} {10} ifelse 5 mul xuntrans + XSCL sign mul def /YSTEPH YSTEP 2 div def /XSTEPH XSTEP 2 div def } bind def @@ -203,6 +205,8 @@ plotdict begin /yuntrans {YTSCL aload pop exch div mul} bind def /xuntrans {XTSCL aload pop exch div mul} bind def +/sign {dup 0 lt {pop -1} {0 gt {1} {0} ifelse} ifelse} bind def + /zero-in-range? {dup 0 get 0 le exch 1 get 0 ge and} bind def /y-axis @@ -245,7 +249,7 @@ bind def } bind def % Given the width (or height) and the data-span, returns an array of -% numerator and denominator (NUM DEN) +% numerator and denominator [NUM DEN] % % NUM will be 1, 2, 3, 4, 5, 6, or 8 times a power of ten. % DEN will be a power of ten. @@ -256,9 +260,9 @@ bind def /find-tick-scale {/DLTA exch def /ISIZ exch def /DEN 1 def - {DLTA ISIZ le {exit} if /DEN DEN 10 mul def /ISIZ ISIZ 10 mul def} loop + {DLTA abs ISIZ le {exit} if /DEN DEN 10 mul def /ISIZ ISIZ 10 mul def} loop /NUM 1 def - {DLTA 10 mul ISIZ ge {exit} if /NUM NUM 10 mul def /DLTA DLTA 10 mul def} loop + {DLTA abs 10 mul ISIZ ge {exit} if /NUM NUM 10 mul def /DLTA DLTA 10 mul def} loop [[8 6 5 4 3 2 1] {/MAX exch def MAX DLTA mul ISIZ le {MAX exit} if} forall NUM mul DEN] } bind def |