function of time,velocity and acceleration

Question

marie 2013-3-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66958-function-of-time-velocity-and-acceleration

评论： Walter Roberson 2017-12-22

the position x as a function of time of a particle that moves
along a straight line is given
   >>>x(t)=0.4*t^4+10.8*t^3-64.4*t^2-28.2*t+4.4 ft 
a)derive the expression for the velocity v(t)

which i did and is v(t)=1.6 t^3 + 32.4t^2-128.8t -28.2

b)derive the expression for the acceleration

which is a(t)=4.8t^2+ 64.8 t -128.8

c)make plots of the position,velocity and acceleration as a function of time in an increment of 0.1s for 0<=t<=8

my question is for part c do i just need to use the command plot(x,v,a)?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Youssef Khmou 2013-3-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66958-function-of-time-velocity-and-acceleration#answer_78420

在 MATLAB Online 中打开

hi try :

 syms t
x=0.4*t.^4+10.8*t.^3-64.4*t.^2-28.2*t+4.4
x=(0.4*t.^4)+(10.8*t.^3)-(64.4*t.^2)-(28.2*t)+4.4
v=diff(x)
a=diff(v)
t=0:0.1:8-0.1;
X=subs(x,t);
V=subs(v,t);
A=subs(a,t);
figure, plot(t,X,t,V,'r',t,A,'g')
legend(' Position','Velocity','Acceleration')

the result is the same?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Youssef Khmou 2013-3-13

在 MATLAB Online 中打开

hi,you can use :

plot(t,X,t,V,'r',t,A,'g') % velocity in RED and accel in Green

or

 plot(t,X)
 hold on
 plot(t,V,'r'); % or any other color you wat
 plot(t,A,'g');
 hold off

请先登录，再进行评论。

Answer 2

Eman Basm 2017-12-3

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/66958-function-of-time-velocity-and-acceleration#answer_294390

Hello, I want to train my data in neural network model my question about the input of neural model my data some of it one value and others vector I do not know if that affect because different in values should be all inputs one value

3 个评论
显示 1更早的评论隐藏 1更早的评论

Eman Basm 2017-12-22

sheet.m

the cyclist thanks your response this is a code after reading more this function to perceptron network, net.adapt param.passes=20, what is param.passes? I know the adapt is function work with perceptron net.