What is the Len function do? It used to exist in MatLab 4.2, but now it doesn't any insight?

R11o = [R11*cos(pi/2-phi2o-nu8),R11*sin(pi/2-phi2o-nu8)];

R023o = [R023*cos(pi/phi2o), R023*sin(pi/phi2o)];

R114o = [-R114*sin(nu7-pi/2+phi3o),-R114*cos(nu7-pi/2+phi3o)];

cthet10 = dot((R11o-R023o),R114o)/(len(R11o-R023o)*len(R114o));

Lsnlo = sqrt(Len(R114o)^2+len(R11o-R023o)^2-2*len(R114o)*len(R11o-R023o)*cthet10);

Answer 1

[the cyclist]

To my knowledge, there has never been a function called len() or Len() in MATLAB.

But, I wonder in your case if len() is a user-defined function, and that Len() is a typo with the first letter capitalized. MATLAB is case-sensitive, so Len() will not work in place of len().

What does

which len
which Len

give as output?

[Sammy Patwary]

it is len, i just typed it wrong as Len. len is what it should be, both don't provide a input or output, and I've check the script that was handed. There is no user define functino for len(). I asumming for now to be length, till i finish typing the code out. The code is on paper atm.

[John D'Errico]

Sorry. But I also do not remember a function called len (and my time using MATLAB goes back to a fair bit before that release.) You may not think it was user defined, but it probably was. Or you got it from somewhere or someone. Then when you got a new release, it is no longer defined, because len was only on the old search path for the old release.

If you have not trashed the old release directories, or they can be found from a backup, you can hopefully recover it.