Plot derivative of an ABS( function ) fails (RESOLVED)

04272015, 12:29 PM
(This post was last modified: 04282015 04:07 PM by StephanP.)
Post: #1




Plot derivative of an ABS( function ) fails (RESOLVED)
While testing the HP Prime I ran into the following odd behaviour.
Symb F1(X)=X^2 10X +21 (between absolute brackets) F2(X)=dF1(X)/dX=X (the derivative of F1) Plot F1 plots fine, bouncing nicely at x=3 and x=7 F2 does not plot well. It gives three horizontal line segments. Y=1 for x < 3 Y=1 for 3 < x < 7 Y=1 for x > 7 If I use the function Slope in the plot windows, then correct slope values are given for F1. For F2, slope values are "NaN". When I remove the absolute brackets from F1, F2 plots perfectly. 

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Messages In This Thread 
Plot derivative of an ABS( function ) fails (RESOLVED)  StephanP  04272015 12:29 PM
RE: Plot derivative of an ABS( function ) fails  StephanP  04282015, 12:25 PM
RE: Plot derivative of an ABS( function ) fails  rprosperi  04282015, 01:28 PM
RE: Plot derivative of an ABS( function ) fails  ww63  04282015, 01:58 PM
RE: Plot derivative of an ABS( function ) fails  CR Haeger  04282015, 02:19 PM
RE: Plot derivative of an ABS( function ) fails  Tim Wessman  04282015, 02:27 PM
RE: Plot derivative of an ABS( function ) fails  StephanP  04282015, 03:58 PM
RE: Plot derivative of an ABS( function ) fails (RESOLVED)  Tim Wessman  04282015, 04:45 PM
RE: Plot derivative of an ABS( function ) fails (RESOLVED)  CR Haeger  04282015, 04:54 PM

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