save spacific entity from matrix

a1=input('give vale if th_1:');
a2=input('give vale if th_2:');
a3=input('give vale if th_3:');
th_1= (a1*pi/180)
th_2= (a2*pi/180);
th_3= (a3*pi/180);
L(1) = Link([ 0 0 20 0 0], 'standard');
L(2) = Link([ 0 0 20 0 0], 'standard');
L(3) = Link([ 0 0 20 0 0], 'standard');
Rob=SerialLink(L);
Rob.name='user nput rob';
Rob.plot([th_1 th_2 th_3]);
T=Rob.fkine([th_1 th_2 th_3])

i have tis code when i run this code it give T 4*4 matrix but when i try to save specifix entities from

T matrix it will give error"Index in position 1 exceeds array bounds (must not exceed 1)"

for saving entity i use this command

h=T(1,4); kindly help

[Walter Roberson]

Is that Link from Peter Corke's Robotics Toolbox, https://www.mathworks.com/matlabcentral/fileexchange/68542-robotics-toolbox-for-matlab ?

[Hafiz Muhammad Saqib Ashfaq]

yes sir

[Walter Roberson]

Which of his toolbox release versions are you using (just in case it makes a difference) ?

Answer 1

[Walter Roberson]

After your

T=Rob.fkine([th_1 th_2 th_3]);

Add

TM = T.T;

Now you can access TM(1,4)

[Hafiz Muhammad Saqib Ashfaq]

thank you so much sir it work for me.can you explane it to understand the problem?

i think i am using (10.3.1 version) this name is written on folder

[Hafiz Muhammad Saqib Ashfaq]

Sir thankyou for your time.

[Hafiz Muhammad Saqib Ashfaq]

sir i want to now that i have fixed manipulator as shown in above code How can

I change the base positon in figure and want to see just top view ? basicaly i want that my robot is positioned at x=70 and y= 70 so ican easily see all configration point round it.Again thank to you for helping me

Have A Nice Day!

[Walter Roberson]

Your variable T is not an array of double. It is an objectoof class S5E (or something similar) which has been defined to have a display() method that displays it T property.

[Walter Roberson]

Sorry, I do not know how to use this toolbox.

[Hafiz Muhammad Saqib Ashfaq]

ok thankyou for your time