How to integrate from t-1 to t in MatLab

Hello everyone. I am new to Matlab and I am taking a course that requires it. I have been able to integrate without problem up to now. I do not know how to code this so it works. I simply need the integral of x from t-1 to t and then add 2 to that and plot it. I have gotten a error for the dimensions not matching. I am not sure what I am doing wrong and would appreciate any help with this. Kind regards.

clear all 
close all
clc
syms x
Ts = 0.01;
t = -10:Ts:10;
y = int(x,t,[t-1, t]); 
yt = y + 2;
plot (t,yt)

Answer 1

[Azzi Abdelmalek]

Something is missing, How x is related to t? look at this example

tt = -10:Ts:10;
syms x t t0
Ts = 0.01;
x=sin(t)
y = int(x,t,[t0-1, t0]); 
yt = y + 2;
out=subs(yt,t0,tt)
plot (tt,out)

[kim webb]

Thank you sir. I will investigate the "out" part of the code. I was not familiar with this. I think I can get things laid out like I want from here. Thank you for your time and kind regards.

Answer 2

[Image Analyst]

Is there some equation for the x vs. t curve? Like is x a constant? Or a line or quadratic or a sine wave with respect to t? Also when they say they want the area between (t-1) and t, then probably gave you specific value for t, because the answer will depend on what that value is, as well as what the formula for the x vs. t equation is.

[kim webb]

Hello, no there is not a specific value for t because it represents time and is changing, so that I would get an output at each moment in time based on the new integration limits. I hope that makes sense. Kind regards