Conversion to double from sym is not possible.

i want to plot the relation between time&velocity by differentiate displacement , but there is an error

syms x t;
x=2.5*cos(10*pi*t);
vel=diff(x,'t');
i=0;
for t=0:.01:100;
i=i+1;
x(i)=x;
vel(i)=vel;
plot(t,vel)
end

??? Error using ==> plot
Conversion to double from sym is not possible.

can you help me ?

Answer 1

[bym]

you don't need the for loop

ezplot(x,vel,[0,100])