The command is working perfectly in the command window but not as a script

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Hi all,
I try to run this script:
[t y] = rk4sys(@lorenz,[0 20],[5 5 5],0.03125);
plot(t,y)
plot(y(:,1), y(:,2)), xlabel('x'), ylabel('y')
plot(y(:,1), y(:,3)), xlabel('x'), ylabel('z')
plot(y(:,2), y(:,3)), xlabel('y'), ylabel('z')
Where the called function lorenz is:
function [ yp ] = lorenz( t,y )
yp = [-10*y(1)+10*y(2);28*y(1)-y(2)-y(2)*y(3);-(8/3)*y(3)+y(1)*y(2)];
end
it gives error:
Error in ==> lorenz at 3
yp = [-10*y(1)+10*y(2);28*y(1)-y(2)-y(2)*y(3);-(8/3)*y(3)+y(1)*y(2)];
However, when i copy that script in the command window it works.
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Answers (1)

Yannick
Yannick on 17 Oct 2013
Just to close the loop on this, the bottom line is that MATLAB file names, just like MATLAB variable or function names, can only contain letters (both lower- and upper-case), digits and underscores. Additionally, they must start with a letter (i.e., cannot start with a digit or an underscore).
In particular, spaces and dashes (-) are not valid characters in function, script and variable names.
  5 Comments
Daniel Shub
Daniel Shub on 19 Oct 2013
@dpb While I am not aware of any "magic" filenames putting files in directories that start with @ or + can cause very unexpected behavior.
dpb
dpb on 19 Oct 2013
Not sure what that has to do with the proper description of allowable m-file naming though???

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