Washington University Department of Electrical Engineering

Characterizing Odors Using Electronic

Nose Sensors

Results: Odor Clustering

One-Dimensional Odor Clustering:
Plotting the voltage results from each sensor and nut  we see that the sensors detect each nut differently. This can be seen by the clustering of data points for each nut. Each sensor detects the same odors differently, as seen by the different voltage values across all sensors.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3-Dimensional Odor Clustering:
Below is a MATLAB 3-D representation of all of the 10 gram nut data. There is distinct clustering of data points for each particular nut. However, there are several outlier points. These outlier points are most likely due to when they were collected. They were collected several weeks before the rest of the data was collected.