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

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ToTo
ToTo 2013-10-16
评论： dpb 2013-10-19
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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回答（1 个）

Yannick
Yannick 2013-10-17
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.
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Daniel Shub
Daniel Shub 2013-10-19
@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 2013-10-19
Not sure what that has to do with the proper description of allowable m-file naming though???

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