Try to learn something about everything, and everything about somethingThomas Huxley “Darwin's bulldog” (1824-1895)

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
public:calculator:guides:dm32_curve_fit [17/04/26 09:12 BST] – [Curve equations] johnpublic:calculator:guides:dm32_curve_fit [17/04/26 19:14 BST] (current) – [Further Information] john
Line 64: Line 64:
 ===== Examples ===== ===== Examples =====
  
-  * Logarithmic+==== Logarithmic ====
  
 |x|0.3|1|2|3|4|5| |x|0.3|1|2|3|4|5|
 |y|-1|2|3.8|5|5.6|6| |y|-1|2|3.8|5|5.6|6|
 +
 +=== Enter Data ===
  
   * <key>XEQ</key> <key>'L'</key>   * <key>XEQ</key> <key>'L'</key>
Line 77: Line 79:
   * 5 <key>R/S</key> 6 <key>R/S</key>   * 5 <key>R/S</key> 6 <key>R/S</key>
  
-Data is complete - run the fit+=== Run the fit ===
  
   * <key>XEQ</key> <key>'R'</key>   * <key>XEQ</key> <key>'R'</key>
Line 87: Line 89:
     * ''y? 4.37571''     * ''y? 4.37571''
   * enter a y-value to calculate an estimate of x   * enter a y-value to calculate an estimate of x
-    * 0.8 <key>R/S</key> +    * 0 <key>R/S</key> (what is x-value where the curve crosses the x-axis at y = 0? The solution to the equation) 
-    * ''X ? 0.61033''+    * ''X ? 0.44520''
   * finish <key>'C'</key>   * finish <key>'C'</key>
  
-The curve equation is '' y = 2.05210 + 2.5359Ln(x) ''+=== Results === 
 + 
 +  * The curve equation is '' y = 2.05210 + 2.5359Ln(x) '' 
 +  * The values for R, B and M are stored in register-variables ''R'', ''B'' and ''M'' for future use 
 +    * e.g. make an ''EQN'' 
 +    * '' Y = B + M x Ln(X) '' 
 +    * the equation can be evaluated, solved or integrated using the stored values for ''B'' and ''M'' 
 +  * Until a new Curve fit program is run, or anything is done to change the Statistics Registers, you can re-run the fit with <key>XEQ</key> <key>'R'</key> to allow more y and x estimates to be made
  
  
Line 98: Line 107:
  
  
-{{tag>}}+{{tag>calculator dm32}}
  
 Page created  : 17/04/26 08:35 BST Page created  : 17/04/26 08:35 BST

Navigation