I am doing a project in Machine learning for small object detection while reversing the car. As part of the data collection for classification, I place a stone and then move the sensor towards the stone stopping at distance of 10cm (i.e the sensor is at 100cm first from stone, I move it from 100-90cm and taken the fft measurements as the sensor moves and then move from 90-80 and collect the sensor readings at the same time for eg(taking readings at 10cm interval until it reaches upto 40cm close to stone). Now I have to calculate mean spectra of the readings at different positions say at 90cm, 80cm etc and plot it to see if its same or different. THis will give be an idea how the spectra changes.
Can some please help me with this. THanks.