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Error: Function definitions are not permitted in this context. ???

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William Gill
William Gill 2012-10-18
关闭： MATLAB Answer Bot 2021-8-20
I have read up on this problem but I cannot seem to figure out why it doesn't work. My code is:
function[y]=fifthroot(P)
x = P; xNew = 0; E = 1;
while(E > 0.00001)
xNew = x - ((x^5)-P)/(x^4);
E = abs((xNew-x)/(x));
x = xNew;
end
y = xNew;
end

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回答（2 个）

Matt Fig
Matt Fig 2012-10-18
Where did you put that code? You cannot define a function at the command line or in a script M-file.
Image Analyst
Image Analyst 2012-10-19
My guess is that you have some code before the function statement, like a clc or some text code to call fifthroot() or something like that. That would make it a script followed by a function, which is not allowed. Make sure the function is the first line in the m-file, and your test code is in a separate m-file or issued from the command line and then it should work.

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