how to change basic signal of rectangular funtion to laplace transform

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

[Mya]

hmmm...sorry but how to change and plot laplace transform? hope u can help me

[Walter Roberson]

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]

ouh alrite and tq for guiding me ;)

Answer 1

[Walter Roberson]

syms pulse_height pulse_start pulse_end t positive
rectangular_pulse = pulse_height * rectangularPulse(pulse_start, pulse_end, t)

rectangular_pulse = 

%now let us work according to theory:
sympref('HeavisideAtOrigin', 1)

ans = 

RP = rewrite(rectangular_pulse, 'heaviside')

RP = 

LRP = laplace(RP)

LRP = 

%but actually we could just work directly on the rectangularPulse object
laplace(rectangular_pulse)

ans =