how to plot a Continuous time signal

a) x(t) = u(1-t); and b) x(t) = [u(t)-u(t-1)];

i use t = [1 8 0 1 5 0 1 5 4];

please help

[KSSV]

How about u? You have to define u.

[Muhammad Fauzan]

please help me

i want the code

[Star Strider]

See: How to Plot a Continues Tiime Signal

[Walter Roberson]

u in these contexts is almost always the Unit Step Function.

[Walter Roberson]

https://www.mathworks.com/help/symbolic/heaviside.html

Make sure to note https://www.mathworks.com/help/symbolic/heaviside.html#buoohb8-1