We know digital computer cannot deal with continuous time signals directly. But then how MATLAB "plot" command works?
Does that uses interpolation technique to show an apparently continous time graph by connecting the various discrete data points?
Till now, i am able to understand is that MATLAB only handles discrete time data, MATLAB models continous time signals using discrete time signals but with very very small sampling interval,so it appears to be continuous while in reality it is discrete and then connects those discrete points using interpolation
I have also attached a snapshot of wikipedia where a graph of polynomial interpolation is shown
I have also attached a snapshot of chapter4 first page of book signal processing first, where interpolation discussion is mentioned