how to show a velocity vector at any two point in matlabs on path curve.also acceleration vector at any two point on velocity curve.
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we have path curve "x = t*exp(-3*t)+0.25*exp(-3*t);" time=t=( 0:0.01:3).. velocity=exp(-3*t)/4 - 3*t*exp(-3*t) accleration =9*t*exp(-3*t) - (15*exp(-3*t))/4
2 个评论
Manolis Michailidis
2015-10-12
If i understand correctly you want to plot all together in one graph? when you say show volecity vector...
Rahman Ali
2015-10-12
编辑：Rahman Ali
2015-10-12
回答（1 个）
Manolis Michailidis
2015-10-12
编辑：Manolis Michailidis
2015-10-12
If this is the case ou can use plot and hold on to achieve it.
t=( 0:0.01:3);
x = t.*exp(-3*t)+0.25*exp(-3*t);
v=exp(-3*t)/4 - 3.*t*exp(-3*t);
a =9*t.*exp(-3*t) - (15*exp(-3*t))/4;
plot(t,x);hold on;plot(t,v,'r');hold on;plot(t,a,'g');
legend('x-curve','volecity','acceleration');
hold on
I hope this helps.
2 个评论
Rahman Ali
2015-10-12
Manolis Michailidis
2015-10-12
编辑：Manolis Michailidis
2015-10-12
I can't see your uploaded image, can you upload it somewhere else and post the link? or try to reupload it here. You can try to ask from the user to enter the points , of course the points should be in the right limits of t , and then you can plot the volecity v for only this 2 points, something like that maybe:
t1 = 'What is the first value? ';
x1 = input(t1);
t2 = 'What is the other value? ';
x2 = input(t2);
% create time vector with 100 points between the values user has set
T=linspace(x1,x2,100);
x = T.*exp(-3*T)+0.25*exp(-3*T);
v=exp(-3*T)/4 - 3*T.*exp(-3*T);
plot(T,x);hold on;plot(T,v,'r');
legend('x-curve','volecity');
grid on
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2015-10-12
2015-10-12
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