Error message names correct method

gist-charts/source/classes/minMax.class.ts

@@ -11,7 +11,7 @@ export class MinMax {
     compare( x: number ) {
         const me = this;
         if ( isNaN(x) ) {
-            throw 'MinMax.apply expects a number but NaN was given ';
+            throw 'MinMax.compare expects a number but NaN was given ';
         }
         me.min = Math.min( x, me.min );
         me.max = Math.max( x, me.max );