Conversion to double from sym is not possible.

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mohamed saber
mohamed saber 2011-10-30
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 ?

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回答（1 个）

bym
bym 2011-10-30
you don't need the for loop
ezplot(x,vel,[0,100])

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