Advantage Pac functions for statistical curve fitting.

CFIT program provides the functions to fit statistics data to LIN, Exp, LOG, Power and Best Fit

XEQALPHACFITALPHA

• Save CFIT to a CST menu entry to make it easier to access

• Clear Statistics Registers with C (CLΣ)
• Enter Statistics in usual way with Y, ENTER, X, A(Σ+)
• When all data pairs are entered press E (FIT)
• Now choose which type of fit to use
  • L = Linear
  • LOG = Logarithmic
  • Ex = Exponential
  • P = Power
  • B = Best Fit
• R/S to cycle through the coefficients of the curve fit a, b, R^2 (error ratio)
• You can next enter an x value to find the curve-fitted y value
• pressing R/S can exit back to the Curves menu L LOG Ex P B to try a different fit to the same data
• pressing R/S can exit back to the main menu to clear and enter a new set of data

• Linear y = a + bx
• Ex y = aebx
• Log y = a + b ln(x)
• Power y = a xb

— John Pumford-Green 31/07/24 14:46 BST