Matlab: Plot discrete sequence data with STEM() 繪製離散序列資料

To plot discrete sequence data in Matlab, use the stem() function:

Example:
For y = e^-x + 1 with x between -2 and 2, plot the continuous y curve and discrete stem diagram.

x = -2:0.1:2;

y = exp(-x)+1;

subplot(211);

plot(x,y);

xlabel('x');ylabel('y');title('y = exp(-x)+1');

subplot(212);

stem(x,y);

xlabel('x');ylabel('y');title('discrete x');

Result:

References:

stem - plot discrete sequence data (MathWorks)
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