How can I define a derivative and norm function inside an integral in matlab?

Hello everybody. I would like to define a norm-2 and derivative of a function inside the integral, but I can not. Here is my code:

tt=0:0.1:pi;
y=sin(tt);
a=1;b=2;c=3;d=4;
syms r(t);
r(t)= a.*(t-tt(1)).^3+b.*(t-tt(1)).^2+c.*(t-tt(1))+d;
L=integral( norm(diff(r(t)),2),0,1)

Answer 1

[Matt J]

The norm would just give a scalar independent of t. Its integral from 0 to 1 would be trivial. Perhaps you meant instead to do,

L=sqrt(  integral( diff(r(t)).^2  ,0,1) )