int and subs function

hi everyone

I would like to do integration to the acceleration

syms t  
c=0.0625;  
a=c*t
v=int(a)
t=0:1:10;
v=subs(v)

the problem when I use subs function this error accor

Attempt to execute SCRIPT error as a function:

C:\Users\Areej Alfetlawi\Desktop\all matlab programs\matlab11-6-2019\matlab\error.

Error in sym/subs>mupadsubs (line 151)

error(inputchk(X,Y));

Error in sym/subs (line 142)

G = mupadsubs(F,X,Y);

Error in int (line 8)

v=subs(v)

Answer 1

[madhan ravi]

Run:

which subs -all
which error -all

In command window and paste the output here. It looks like you have a script named error.m that you may have created.

[Walter Roberson]

Yes, you need to delete or rename

C:\Users\Areej Alfetlawi\Desktop\all matlab programs\matlab11-6-2019\matlab\error.m

[areej abdulshaheed]

thank you brother

another question plz

if I have the acceleration

a=0.0625; T=32

1. s=a at 0<=t<T/10
2. s= 0 at T/10<=t <9T/10
3. s=-a at 9T/10<=t<T

how can I fine the velocity (v) and the distance (d)

[Walter Roberson]

s = piecewise(0 <= t & t <= T/10, a, ...
              T/10 <= t & t < 9*T/10, 0, ...
              9/10*T <= t & t < T, -a, ...
              nan)      %t < 0 or t >= T

However, there is no obvious connection between s and v or d.

[areej abdulshaheed]

v& d is the itegration of acceleration. but I dont know which type I use for itegration

v=int(s,t,0,T/10)

or

v=int(s,t)

t=0:T/10

V=subs(v)

[Walter Roberson]

Do you want the final result or do you want the results at times 0, 1, 2, and 3?

[areej abdulshaheed]

I want the result at t=0,1,2,........

[Walter Roberson]

Then the second one.

[areej abdulshaheed]

THANK YOU