Scales and values

[honkytonk]

Hello everyone, I am looking for a generic method to adapt scales to sets of values; example:
Display: 400 pixels
A values: min = 2.4; max = 15.7
B values: min = 3100; max = 7200
Graduations accordingly ...
Additional difficulty is to start the scale before 2.4 and finish after 15.7; before 3100 and after 7200
How to have an identical (same) method for all cases?
Thank you for.

[Rod]

Just one way.

'Display: 400 pixels
'A values: min = 2.4; max = 15.7
'B values: min = 3100; max = 7200

d=400

a=2.4
aa=15.7
b=3100
bb=7200

a=a-a/100*10
aa=aa+aa/100*10
range=aa-a
print "Start ";a
print "End   ";aa
print "Range ";range
perPixelInc=range/d
print "Per pixel increment "; perPixelInc
for n=390 to 10 step -10
print "Scale "; n,n*perPixelInc+a
next

b=b-b/100*10
bb=bb+bb/100*10
range=bb-b
print "Start ";b
print "End   ";bb
print "Range ";range
perPixelInc=range/d
print "Per pixel increment "; perPixelInc
for n=390 to 10 step -10
print "Scale "; n,n*perPixelInc+b
next


Actually I should have applied the 10% margin to the initial range not a and aa separately.

[Rod]

A lot of good stuff posted here. libertybasiccom.proboards.com/thread/294/project-charts-business-graphics

[honkytonk]

Thank you very much, I will implement this.
Véry good links !!