function of time,velocity and acceleration

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)?

Answer 1

[Youssef Khmou]

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?

[Youssef Khmou]

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

Answer 2

[Eman Basm]

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

[the cyclist]

You've asked your question by putting it as an answer in a 4-year-old question. Almost no one will see it here. (It was almost coincidental that I saw it.)

I suggest that you try again, and be sure to make it a new question. Also, you should add significantly more detail to your question, because it is not clear what you are asking for. (Include your code, too, if that is possible.)

[Eman Basm]

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.

[Walter Roberson]

That is not relevant to the Question here. You should use a distinct Question for that.

Answer 3

[the cyclist]

I think the question is asking for

plot(t,x)
plot(t,v)
plot(t,a)

You will need to define the increment of t as a vector, as describe in the question.