how to change basic signal of rectangular funtion to laplace transform

Question

Mya 2022-1-31

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https://ww2.mathworks.cn/matlabcentral/answers/1639495-how-to-change-basic-signal-of-rectangular-funtion-to-laplace-transform

评论： Mya 2022-1-31

fprintf('Please choose any type of signal below.\n1. Impulse\n2. Step function\n3. DC Source\n4. Signum function\n5. Rising exponent function\n6. Cosine function\n7. Sine function\n8. Square function\n9. Triangular function\n10. Symmetrical decaying exponent function')
s = input('\nSignal number: ');
switch(s)
    
    case 8
        t =-3:0.01:5;
        c=input('amplitude:');
        A = input('Amplitude scale value:');
        B = input('Amplitude shift value: ');
        a = input('Time scale value: ');
        b = input('Time shift value: ');
        y=c*((t>=-1)&(t<=1));
        figtitle ='rectangular pulse';
        subplot(3,1,1)
        plot(t,y,'b')
        hold on
        plot((t./a)+b,A*y+B,'r')
        hold off
        title(figtitle)
        xlabel('Time')
        ylabel('Amplitude')
        grid on
        % adjust limits to create padding
        xlim(xlim + [-2 1]*1.2)
        ylim(ylim + [-2 1]*1.2)
        
        subplot (3,1,2)
        x = -3:0.01:3;
        d = c.*sinc((x*2)./2); 
        plot(x, d) 
        ylim([-c-2 c+2])
        grid on 
        title('fourier transform');
        ylabel('F(w)');
        xlabel('w');
        %how to subplot laplace transform of rectangular function

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Walter Roberson 2022-1-31

After you do the laplace(), use subs() to replace the start and end positions and height with specific values, leaving t as symbolic. Then fplot() the results, making sure to pass in the bounds you want to plot over.

Mya 2022-1-31