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public:calculator:guides:ppc_cv [16/02/26 21:12 GMT] – [DM41X PPC ROM Curve Fit] johnpublic:calculator:guides:ppc_cv [17/02/26 08:00 GMT] (current) – [Further Information] john
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-==== Running CV ====+===== Running CV =====
  
 <key>XEQ</key> <key>ALPHA</key>''CV''<key>ALPHA</key> <key>XEQ</key> <key>ALPHA</key>''CV''<key>ALPHA</key>
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 |     | Σ+ |  Solve Type J  |  Y  |  X  |  Solve Best Type  | |     | Σ+ |  Solve Type J  |  Y  |  X  |  Solve Best Type  |
  
-Unlike normal Stats entry (where Y-value is entered first, then ENTER, then X-value is entered second, so that the X-value is in the ''X'' register before pressing ∑+) here we enter in "conventional" order:+Unlike normal Stats entry (where Y-value is entered first, then ENTER, then X-value is entered second, so that the X-value is in the ''X'' register before pressing ∑+) here we enter in "conventional" order.
  
-  * ''X'' <key>ENTER</key> ''Y'' <key>Σ+</key> +  * Clear old data <key>SHIFT</key> <key>'E'</key> (Initialize) 
-  * ''X'' <key>ENTER</key> ''Y'' <key>Σ+</key> +  * ''X'' <key>ENTER</key> ''Y'' <key>'Σ+'</key> 
-  * ''X'' <key>ENTER</key> ''Y'' <key>Σ+</key> +  * ''X'' <key>ENTER</key> ''Y'' <key>'Σ+'</key> 
-  * ''X'' <key>ENTER</key> ''Y'' <key>Σ+</key>+  * ''X'' <key>ENTER</key> ''Y'' <key>'Σ+'</key> 
 +  * ''X'' <key>ENTER</key> ''Y'' <key>'Σ+'</key>
   * etc.....   * etc.....
  
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   * enter a fit-type digit (''J'')   * enter a fit-type digit (''J'')
-    * 1 : Linear : Y = b*X + a +    * 1 : Linear : '' Y = b*X + a '' 
-    * 2 : Exponential : Y = a*e<sup>bX</sup> +    * 2 : Exponential : '' Y = a*e<sup>bX</sup> '' 
-    * 3 : Logarithmic : Y = b*Ln(X) + a +    * 3 : Logarithmic : '' Y = b*Ln(X) + a '' 
-    * 4 : Power : Y = a*X<sup>b</sup>+    * 4 : Power : '' Y = a*X<sup>b</sup> ''
   * then press <key>'B'</key> to ''Solve Type J''   * then press <key>'B'</key> to ''Solve Type J''
  
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   * press <key>'E'</key> to ''Solve Best Type''   * press <key>'E'</key> to ''Solve Best Type''
  
 +The solution appears as 
  
 +''Z'' : r correlation coefficient
 +''Y'' : a coefficient
 +''X'' : b coefficient
  
 +You can now get estimates of ''Y'' (for a given ''X'') or ''X'' (for a given ''Y'')
 +
 +You can accumulate more data (to add to what's already there) and do another FIT calculation.
 +
 +If you want equally spaced ''X'' coordinates for single variable Y-data ''CV'' puts incrementing digit in ''X'' so you simply
 +
 +<key>ENTER</key> ''Y<sub>1</sub>'' <key>'Σ+'</key>
 +
 +<key>ENTER</key> ''Y<sub>2</sub>'' <key>'Σ+'</key>
 +
 +<key>ENTER</key> ''Y<sub>3</sub>'' <key>'Σ+'</key>
 +
 +<key>ENTER</key> ''Y<sub>4</sub>'' <key>'Σ+'</key>
 +
 +...
 +
 +and you accumulate as if you'd entered ''(1,Y<sub>1</sub>)'', ''(2,Y<sub>2</sub>)'', ''(3,Y<sub>3</sub>)'', ''(4,Y<sub>4</sub>)''... 
 +
 +If you have ''X'' and ''Y'' data then the automatically incrementing ''X'' is overwritten by the manually entered //real// ''X'' values.
 +
 +===== Examples =====
 +
 +
 +==== Manual Linear Fit ====
 +
 +=== Data ===
 +
 +Negative ''X'' and ''Y'' values allowed for a ''Linear'' Fit
 +
 +
 +^X^Y^
 +| -1.5 | -3|
 +|1.1|5.2|
 +|4.5|12.6|
 +|8.0|20.0|
 +|10.0|23.0|
 +|15.6|34.0|
 +
 +=== Entry procedure ===
 +
 +  * <key>SHIFT</key> <key>'E'</key> ''Initialize''
 +  * ''1.5''<key>CHS</key> <key>ENTER</key> ''3''<key>CHS</key> <key>'∑+'</key>
 +  * ''1.1''<key>ENTER</key> ''5.2'' <key>'∑+'</key>
 +  * ''4.5''<key>ENTER</key> ''12.6'' <key>'∑+'</key>
 +  * ''8''<key>ENTER</key> ''20'' <key>'∑+'</key>
 +  * ''10''<key>ENTER</key> ''23'' <key>'∑+'</key>
 +  * ''15.6''<key>ENTER</key> ''34'' <key>'∑+'</key>
 +
 +=== Fit to Linear ===
 +
 +  * ''1'' (for Linear Fit ''J'' = ''1'') <key>'B'</key>
 +
 +=== Results ===
 +
 +  * Z : '' 0.995734680  '' : r correlation coefficient
 +  * Y : '' 2.017167182  '' : a coefficient (y-intercept)
 +  * X : '' 2.113978698  '' : b coefficient (gradient)
 +
 +Linear Equation : '' Y = 2.114 X + 2.017 ''
 +
 +=== Estimations ===
 +
 +Predict ''Y'' for ''X = 20 ''
 +
 +  * ''20'' <key>'C'</key> 
 +    * '' 44.9674114 ''
 +
 +Predict ''X'' for ''Y = 25 ''
 +
 +  * ''25'' <key>'D'</key>
 +    * '' 10.87183747 ''
 +
 +
 +
 +==== Best Fit Method ====
 +
 +FIXME
  
  
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 ===== Further Information ===== ===== Further Information =====
  
 +See also : [[dm41x_ppc|]]
  
 {{tag>calculator dm41x}} {{tag>calculator dm41x}}
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 Page created :  16/02/26 20:13 GMT Page created :  16/02/26 20:13 GMT
  
-Page upated : ~~LASTMOD~~+Page updated : ~~LASTMOD~~
  

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