Added normalised signal display

ppg.cpp

@@ -98,6 +98,26 @@ int main(){
 			{
 				greenSignalNormalized.push_back((greenSignal.at<double>(0, l_sample)-mean[0])/stddev[0])
 			}
+
+			//Display normalised signal
+			template <typename T>
+			cv::Mat plotGraph(std::vector<T>& vals, int YRange[2])
+			{
+				auto it = minmax_element(vals.begin(), vals.end());
+				float scale = 1./ceil(*it.second - *it.first);
+				float bias = *it.first;
+				int rows = YRange[1] - YRange[0] + 1;
+				cv::Mat image = 255*cv::Mat::ones( rows, vals.size(), CV_8UC3 );
+				image.setTo(255);
+				for (int i = 0; i < (int)vals.size()-1; i++)
+				{
+					cv::line(image, cv::Point(i, rows - 1 - (vals[i] -
+					bias)*scale*YRange[1]), cv::Point(i+1, rows - 1 - (vals[i+1] -
+					bias)*scale*YRange[1]), cv::Scalar(255, 0, 0), 1);
+				}
+				return image;
+			}
+			
 		}
 	}	
 }