TimerFcn, Error using VertCat?

This is my code:

set(t,'ExecutionMode','fixedrate','Period',1,'TimerFcn',[

'cent=(y3dnew(1,:)+y3dnew(5,:))/2;' ,

'xax=(y3dnew(4,:)+y3dnew(5,:))/2 - cent;',

'yax=y3dnew(3,:) - cent;',

'yax=yax/norm(yax);',

'axi=xax/norm(xax);',

'normal=cross(axi,yax);',

   'phi=.5;',

'M = [cosd(phi)+axi(1)^2*(1-cosd(phi))  axi(1)*axi(2)*(1-cosd(phi))+axi(3)*sind(phi)   axi(1)*axi(3)*(1-cosd(phi))-axi(2)*sind(phi) ; axi(1)*axi(2)*(1-cosd(phi))-axi(3)*sind(phi)  cosd(phi)+axi(2)^2*(1-cosd(phi))  axi(2)*axi(3)*(1-cosd(phi))+axi(1)*sind(phi); axi(1)*axi(3)*(1-cosd(phi))+axi(2)*sind(phi)  axi(2)*axi(3)*(1-cosd(phi))-axi(1)*sind(phi)  cosd(phi)+axi(3)^2*(1-cosd(phi)) ];',

'y3dnew(1,:)=(y3dnew(1,:)-cent)*M+cent;',

'y3dnew(2,:)=(y3dnew(2,:)-cent)*M+cent;',

'y3dnew(3,:)=(y3dnew(3,:)-cent)*M+cent;',

'y3dnew(4,:)=(y3dnew(4,:)-cent)*M+cent;',

'y3dnew(5,:)=(y3dnew(5,:)-cent)*M+cent;',

'trans=[0 -2*norm(cent)*sind(phi) 0]*inv([normal(1) axi(1) yax(1); normal(2) axi(2) yax(2);normal(3) axi(3) yax(3)]);',

'y3dnew(1,:)=y3dnew(1,:)-trans;',

'y3dnew(2,:)=y3dnew(2,:)-trans;',

'y3dnew(3,:)=y3dnew(3,:)-trans;',

'y3dnew(4,:)=y3dnew(4,:)-trans;',

'y3dnew(5,:)=y3dnew(5,:)-trans;',

'cent=(y3dnew(1,:)+y3dnew(5,:))/2;',

'y3dnew(1,:)=(y3dnew(1,:)-cent)*M+cent;',

'y3dnew(2,:)=(y3dnew(2,:)-cent)*M+cent;',

'y3dnew(3,:)=(y3dnew(3,:)-cent)*M+cent;',

'y3dnew(4,:)=(y3dnew(4,:)-cent)*M+cent;',

'y3dnew(5,:)=(y3dnew(5,:)-cent)*M+cent;'],'TasksToExecute',500);

Now I'm getting an error:

 Error using ==> vertcat
  CAT arguments dimensions are not consistent

Now when I run each line in the TimerFcn separately, there seems to be no error. So, it must be something to do with TimerFcn syntax?

btw, y3dnew is a 5x3 matrix of numbers. And the M in the code is a 3x3 matrix of numbers.

Sorry for the inelegance of the code, but I need help

Answer 1

[TAB]

Instead of providing such large code in the set() function argument , I will recommend you to write the code as separate callback function in different m-file and provide the file name as argument to set() function.

See here about how to write a timer callback function.

[Mohsin]

I tried that, but get some errors I can't seem to bypass. This seems like the best way to do so.

I'd just like to know if there's a syntax error in how I've specified the TimerFcn. I don't normally work with timers, and hence, am quite probably wrong

[Mohsin]

Never mind. All I had to do was add "..." after every ",". Thanks anyway

[Jan]

No, using a large string as callback is definitely a very bad choice. Don't do it, but write it as a function. If errors occur, fix them.

Remember that the timer function is processed in the base workspace. Therefore the string callback is very susceptible and impossible to debug.

[Jan]

@TAB: I've removed your flag. I agree with you, that your suggestion is much better than Mohsin's solution. But obviously he has good reasons and forgot to explain them. But you get my vote.

[TAB]

OK, Jan.