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Why do I receive 'Error using sym>tomupad' in Line 6 when plotting impulse signal with right time shifting?

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TEOH CHEE JIN
TEOH CHEE JIN 2022-12-5
编辑： VBBV 2022-12-5
%create symbolic functions x, a, b, c, d, e, f_c with independent variable t
syms x(t) a(t) h(t) b(t) c(t) d(t) e(t) f_c(t)
x(t) = cos(100*pi*t);
a(t) = x(0.4*t);
h(t) = stem([0]+0.02,[1]);
%plot signal x(t)
figure
fplot(x(t))
xlim([-0.5 0.5]),ylim([-2 2])
title ('Time domain of signal x(t)')
xlabel('Time, t')
ylabel('Amplitude, x(t)')
grid on
%plot signal h(t)
figure
fplot(h(t))
xlim([-0.5 0.5]),ylim([-2 2])
title ('Time domain of signal h(t)')
xlabel('Time, t')
ylabel('Amplitude, h(t)')
grid on

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VBBV
VBBV 2022-12-5
Ran in:
%create symbolic functions x, a, b, c, d, e, f_c with independent variable t
syms x(t) a(t) h(t) b(t) c(t) d(t) e(t) f_c(t)
x(t) = cos(100*pi*t);
a(t) = x(0.4*t);
h = stem([0]+0.02,[1])
h =
Stem with properties: Color: [0 0.4470 0.7410] LineStyle: '-' LineWidth: 0.5000 Marker: 'o' MarkerSize: 6 MarkerFaceColor: 'none' BaseValue: 0 XData: 0.0200 YData: 1 Show all properties
%plot signal x(t)
figure
fplot(x(t))
xlim([-0.5 0.5]),ylim([-2 2])
title ('Time domain of signal x(t)')
xlabel('Time, t')
ylabel('Amplitude, x(t)')
grid on
%plot signal h(t)
% figure
% plot(h.XData,h.YData)
% % xlim([-0.5 0.5]),ylim([-2 2])
% title ('Time domain of signal h(t)')
% xlabel('Time, t')
% ylabel('Amplitude, h(t)')
% grid on
  1 个评论
VBBV
VBBV 2022-12-5
编辑：VBBV 2022-12-5
h = stem([0]+0.02,[1]) % stem returns the function handle structure
You are trying to plot function handle using fplot. instead access XData , YData from function handle and plot

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