Short-Time Fourier Transform and Decision Tree-Based Pattern Recognition for Gas Identification Using Temperature Modulated Microhotplate Gas Sensors

Table 1

The dataset in detail.

Heating waveform and period (s)	Number of samples
	Methane	Carbon monoxide	Ethanol	Total
Sinusoid	128	128	128	384
4, 10, 20, 30, 40, 50, 60, and 80
Rectangle	128	128	128	384
4, 10, 20, 30, 40, 50, 60, and 80
Sawtooth	128	128	128	384
4, 10, 20, 30, 40, 50, 60, and 80
Triangle	128	128	128	384
4, 10, 20, 30, 40, 50, 60, and 80