getMedianValue with option to exclude zeros

Author: christianrickert

.gitignore

@@ -1,2 +1,3 @@
 
 *.swp
+tags

Library.txt

@@ -40,7 +40,7 @@ requires("1.53h");  // minimum ImageJ version
 
 // global, preset for all macros
 var delimiter = ":";
-var libraryVersion = "CU-MacroLibrary v1.00 (2023-04-27)";
+var libraryVersion = "CU-MacroLibrary v1.00 (2023-04-28)";
 
 /*
  *  Start
@@ -195,17 +195,21 @@ function getMedian(min_in, max_in)
 }
 
 // Function to return the median value of an array
-function getMedianValue(array) {
+function getMedianValue(array, includeZeros) {
 	output = NaN;
+	if ( !includeZeros ) {
+		array = Array.deleteValue(array, 0.0);
+	}
 	arrayLength = array.length;
+	Array.sort(array);  // in-place
 	if ( arrayLength > 0 ) {
 		if ( arrayLength == 1 ) {  // single element (float or string)
 			output = parseFloat(array[0]);
 		} else if ( arrayLength % 2 != 0 ) {  // odd number of elements
 			output = array[Math.floor(arrayLength / 2)];
 		} else {  // even number of elements
-			rightIndex = array[Math.floor(arrayLength / 2)];
-			leftIndex = array[rightIndex - 1];
+			rightIndex = Math.floor(arrayLength / 2);
+			leftIndex = rightIndex - 1;
 			output = (array[leftIndex] + array[rightIndex]) / 2.0;
 		}
 	}