if (Double.isNaN(this.maximumRangeValue)) {
                this.maximumRangeValue = maxval;
                this.maximumRangeValueRow = r;
                this.maximumRangeValueColumn = c;
            }
            else if (maxval > this.maximumRangeValue) {
                this.maximumRangeValue = maxval;
                this.maximumRangeValueRow = r;
                this.maximumRangeValueColumn = c;