home/regression-approach.md

@@ -3,6 +3,7 @@ title: regression approach - powerlaw
 ---
 
 
+
 ## Dependency
 
 It is assumed the data can be described by a power law, expressed either as Y or X dependent (referring to the second and first axis on a fatigue curve).
@@ -78,7 +79,7 @@ Perform _minmax_ normalization. By doing so ensures that the features used by th
 
 ```math
 X_{s} = \frac{X_i - X_{\textrm{min}}}{X_{\textrm{max}} - X_{\textrm{min}}}, \quad
-X_{s} = \frac{Y_i - Y_{\textrm{min}}}{Y_{\textrm{max}} - Y_{\textrm{min}}}
+Y_{s} = \frac{Y_i - Y_{\textrm{min}}}{Y_{\textrm{max}} - Y_{\textrm{min}}}
 ```
 
 where the lower index s is an abbreviation for scaled.