how to plot this function

how to plot this function x(t) = r(t+2)- r(t+1)- r(t-1)+ r(t-2);

knowing that t = -3:2 ;

help please ??

Answer 1

[Atsushi Ueno]

t = -3:2;
plot(t, x(t))

[Ahmed Amer]

what about r ???

[Atsushi Ueno]

You need following as x.m file:

function out = x(t)
    out = r(t+2)- r(t+1)- r(t-1)+ r(t-2);
end

and you also need following as r.m file:

function out = r(t)
    out = 0; % something your function I don't know
end

[Ahmed Amer]

here is the function

[Ahmed Amer]

I need to plot it

[Atsushi Ueno]

Thank you. I understand that r() is a ramp function and maybe u() is a step function.

https://jp.mathworks.com/help/signal/gs/impulse-step-and-ramp-functions.html

Also, you should check this similar question.

https://jp.mathworks.com/matlabcentral/answers/604759-x-t-u-t-3-2u-t-1-2u-t-1-u-t-3#answer_504931

[Atsushi Ueno]

You don't need m-file for each function as I said by using anonymous function like other Q&A above.

t = -3:2;
r = @(t) t.*(t>=0);
x = @(t) r(t+2)- r(t+1)- r(t-1)+ r(t-2);
plot(t, x(t));

[Ahmed Amer]

so how i can plot it could you please write the code

[Atsushi Ueno]

I've written the code above. I will repeat it again.

t = -3:2;
r = @(t) t.*(t>=0);
x = @(t) r(t+2)- r(t+1)- r(t-1)+ r(t-2);
plot(t, x(t));

[Ahmed Amer]

sorry i did not saw it ,thanks