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public:calculator:guides:dm15l_curve_fit [01/02/26 22:16 GMT] – [Method for Exponential] johnpublic:calculator:guides:dm15l_curve_fit [06/04/26 13:40 BST] (current) – [Example Data] john
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-====== DM15L : Non-linear Curve Fit ======+====== DM15L Non-linear Curve Fit ======
  
 ** Using DM15L/HP15C built-in L.R function to fit non-linear curves ** ** Using DM15L/HP15C built-in L.R function to fit non-linear curves **
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 ===== Tl;dr ===== ===== Tl;dr =====
  
-==== Method for Exponential ====+==== Method for Exponential==== 
 +**y = b.e<sup>ax</sup>**
  
 '' Ln(y) = a.x + Ln(b) '' '' Ln(y) = a.x + Ln(b) ''
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 ==== Method for Logarithmic ==== ==== Method for Logarithmic ====
 +**y=a.ln(x)+b**
  
-''y = a.ln(x) + b ''+''y = a.Ln(x) + b ''
  
 |Enter Accumulation data | '' y<sub>i</sub> <key>Enter</key> x<sub>i</sub> <key>'g'</key><key>Ln</key><key>'∑+'</key>''| |Enter Accumulation data | '' y<sub>i</sub> <key>Enter</key> x<sub>i</sub> <key>'g'</key><key>Ln</key><key>'∑+'</key>''|
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 ==== Method for Power ==== ==== Method for Power ====
 +**y=b.x<sup>a</sup>**
  
 '' Ln(y) = a.Ln(x) + Ln(b) '' '' Ln(y) = a.Ln(x) + Ln(b) ''
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 ==== Example Data ==== ==== Example Data ====
  
-|**x**|0.8|1.1|1.7|2.1|+
 |**y**|2.8|3.6|5.8|8.0| |**y**|2.8|3.6|5.8|8.0|
 +|**x**|0.8|1.1|1.7|2.1|
  
  
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 ==== Example Data ==== ==== Example Data ====
  
-|**x**|0.8|1.7|2.6|4.9| 
 |**y**|1.5|1.7|1.8|2.1| |**y**|1.5|1.7|1.8|2.1|
 +|**x**|0.8|1.7|2.6|4.9|
 +
  
 <key>'f'</key><key>clear ∑</key> <key>'f'</key><key>clear ∑</key>
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 Linear Regression Coefficients : <key>'f'</key><key>L.R.</key>  Linear Regression Coefficients : <key>'f'</key><key>L.R.</key> 
  
-''X: 0.324'' = ''a''+''Y: 0.324'' = ''a''
  
-''Y: 1.544'' = ''b''+''X: 1.544'' = ''b''
  
 **Equation** ''y = 0.324 . Ln(x) + 1.544 '' **Equation** ''y = 0.324 . Ln(x) + 1.544 ''
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 ==== Example Data ==== ==== Example Data ====
  
-|**x**|0.6|1.3|2.4|3.6| 
 |**y**|1.3|2.2|3.3|4.4| |**y**|1.3|2.2|3.3|4.4|
 +|**x**|0.6|1.3|2.4|3.6|
 +
  
 <key>'f'</key><key>clear ∑</key> <key>'f'</key><key>clear ∑</key>

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