TABLE OF CONTENTS 



Page 

 INTRODUCTION 1 



PROBLEM DEFINITION 1 



Preserve Features of Profile Gradient 1 



Eliminate Spurious Gradient Irregularities . o 4 



Identify Straight Line Subsets in a Data Point Aggregate 4 



PROBLEM SOLUTION 6 



Graphical Solution <> 6 



Tolerance a Function of Trace Slope 6 



Trio! and Error Regression Method , . . . „ o . . 8 



Intersection o .... 10 



Smoothing = » • 12 



Width of the "Thin" Stylus Line 12 



Measure of "Appropriateness of Fit" • • • 14 



COMMENTS AND CONCLUSIONS 17 



Room for Analytical Studies 17 



The "Three Level Tolerance Algorithm" 17 



Compromise Regression Points 18 



Fitting Curvelinear Functions . f 18 



Other Kinds of Profile Data Sets 19 



