return null on getString() for NaN values

core/src/processing/data/Table.java

@@ -2984,11 +2984,19 @@ public class Table {
         return missingString;
       }
       return columnCategories[column].key(cat);
-    } else {
-      return String.valueOf(Array.get(columns[column], row));
+    } else if (columnTypes[column] == FLOAT) {
+      if (Float.isNaN(getFloat(row, column))) {
+        return null;
+      }
+    } else if (columnTypes[column] == DOUBLE) {
+      if (Double.isNaN(getFloat(row, column))) {
+        return null;
+      }
     }
+    return String.valueOf(Array.get(columns[column], row));
   }
 
+
   /**
    * @param columnName title of the column to reference
    */
@@ -3443,9 +3451,9 @@ public class Table {
   // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
 
-  public void replaceAll(String orig, String replacement) {
+  public void replaceAll(String regex, String replacement) {
     for (int col = 0; col < columns.length; col++) {
-      replaceAll(orig, replacement, col);
+      replaceAll(regex, replacement, col);
     }
   }
 

core/todo.txt

@@ -1,6 +1,10 @@
 0229 core (3.0a2)
 X add copy() method to Table
 
+_ need a better method for "missing" data in Table
+_   if missing int is zero, can't just remove those values from saving a table
+_   but for NaN values, it's a necessity
+
 
 pulls
 X implement A and a (elliptical arcs)