Replace the symbolic with values ?

Question

Mohammed kandeel 2018-4-26

评论： Walter Roberson 2018-4-26

Hello All i have program with the following

syms O1 L1; T1 = [cos(O1),0,sin(O1),0;sin(O1),0,-cos(O1),0;0,1,0,L1;0,0,0,1];

i need to run the program with the values L1=1; O1=0;

I have program to 5_DOF robotics arm and i need to check it with values so please help. thanks

Walter Roberson 2018-4-26

Duplicates https://www.mathworks.com/matlabcentral/answers/397576-replace-the-symbol-with-value

Answer 1

Star Strider 2018-4-26

The easiest way is to define the values before defining ‘T1’:

syms O1 L1 
L1 = 1;
O1 = 0;
T1 = [cos(O1),0,sin(O1),0;sin(O1),0,-cos(O1),0;0,1,0,L1;0,0,0,1];

They will substitute automatically. If you want to substitute them after defining ‘T1’, use the subs function.