Octave (4.Plot Data)

>> t = [0:0.01:0.98]; >> y1 = sin(2*pi*4*t); >> plot(t,y1)    >> plot(t,y1) >> hold on; >> plot(t,y2,'r'); >> legend('sin','cos') >> xlabel('time') >> ylabel('value') >> title('my plot') >> cd 'E:\Mac

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