ULTRASONIC CALIBRATION CONTACT--DAN CHWIRUT (NIST) NON-LINEAR MODEL--EXPONENTIAL/LINEAR MODEL NUMBER OF OBSERVATIONS = 54 TOTAL NUMBER OF VARIABLES PER LINE IMAGE = 3 1. RESPONSE VARIABLE Y = ULTRASONIC RESPONSE 2. X = METAL DISTANCE 3. TAG = CODED METAL DISTANCE NOTE--MODEL--Y = EXP(-ALPHA*X)/(A+B*X) WITH STARTING VALUES--ALPHA = .1 A = .01 B = .01 NOTE--THIS FILE IS A SUBSET OF CHWIRUT1.DAT TO READ THIS FILE INTO DATAPLOT-- SKIP 25 READ CHWIRUT2.DAT Y X Y X TAG ---------------------- 92.9 0.5 1 57.1 1.0 1 31.05 1.75 1 11.5875 3.75 1 8.025 5.75 1 63.6 0.875 2 21.4 2.25 2 14.25 3.25 2 8.475 5.25 2 63.8 0.75 3 26.8 1.75 3 16.4625 2.75 3 7.125 4.75 3 67.3 0.625 4 41.0 1.25 4 21.15 2.25 4 8.175 4.25 4 81.50 .50 5. 13.12 3.00 6. 59.90 .75 8. 14.62 3.00 10. 32.90 1.50 11. 5.44 6.00 13. 12.56 3.00 14. 5.44 6.00 16. 32.00 1.50 17. 13.95 3.00 17. 75.80 .50 18. 20.00 2.00 18. 10.42 4.00 18. 59.50 .75 19. 21.67 2.00 19. 8.55 5.00 19. 62.00 .75 20. 20.20 2.25 20. 7.76 3.75 20. 3.75 5.75 20. 11.81 3.00 24. 54.70 .75 27. 23.70 2.50 27. 11.55 4.00 27. 61.30 .75 28. 17.70 2.50 28. 8.74 4.00 28. 59.20 .75 29. 16.30 2.50 29. 8.62 4.00 29. 81.00 .50 31. 4.87 6.00 31. 14.62 3.00 34. 81.70 .50 37. 17.17 2.75 37. 81.30 .50 39. 28.90 1.75 40.