How to autoscale a shape?

12302014, 03:21 PM
(This post was last modified: 12302014 03:22 PM by Han.)
Post: #2




RE: How to autoscale a shape?
(12302014 01:48 PM)Giancarlo Wrote: Hello, The HP Prime's screen is 320:240 = 4:3. Suppose your X values are in \( [a,b] \) and your Y values are in \( [c,d] \). You can either keep the Xrange at \( [a,b] \) and then scale the Yrange to \[ \left[ \frac{c+d}{2} \frac{1}{2}\left( \frac{3}{4}(ba)\right), \frac{c+d}{2}+ \frac{1}{2}\left( \frac{3}{4}(ba)\right) \right]. \] Or you can keep the Yrange at \( [c,d] \) and scale the Xrange \[ \left[ \frac{a+b}{2} \frac{1}{2}\left( \frac{4}{3}(dc)\right), \frac{a+b}{2}+ \frac{1}{2}\left( \frac{4}{3}(dc)\right) \right]. \] I purposely left the math unsimplified so you can check the derivation yourself. The decision as to which axis to scale can be made by determining whether \( \frac{3}{4}(ba) > (dc) \). That way, you will maintain the 4:3 ratio and ensure that all points are displayed. Graph 3D  QPI  SolveSys 

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Messages In This Thread 
How to autoscale a shape?  Giancarlo  12302014, 01:48 PM
RE: How to autoscale a shape?  Han  12302014 03:21 PM
RE: How to autoscale a shape?  Giancarlo  12302014, 06:34 PM

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