Error when inputting function.

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Truxton 2013-2-10

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https://ww2.mathworks.cn/matlabcentral/answers/62949-error-when-inputting-function

Hi, I can't figure out why I am getting the error. Here is the function.

 function y=nest(d,c,x,b)
|
Error: Function definitions are not permitted in this context.

And this is the code I am trying to perform in matlab.

%Program 0.1 Nested multiplication %Evaluates polynomial from nested form using Horner’s Method 
%Input: degree d of polynomial, 
% array of d+1 coefficients c (constant term first), 
% % x-coordinate x at which to evaluate, and array of d base points b, if needed 
%Output: value y of polynomial at x
function y=nest(d,c,x,b) 
if nargin<4,
    b=zeros(d,1);
 end 
y=c(d+1); 
for i=d:-1:1 
   y = y.*(x-b(i))+c(i); 
end

RunningthisM atlab fun

Page(s): 3, Numerical Analysis, 2/e by Timothy Sauer, Pearson Education NOOK Study ( , truxton@udel.edu). This material is protected by copyright.

采纳的回答

Jos (10584) 2013-2-11

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https://ww2.mathworks.cn/matlabcentral/answers/62949-error-when-inputting-function#answer_74572

I assume you did put that code in the editor and saved it as an m-file which you called from the command line (or from a script) and then got the error?

Is the second line ("Horner's method") on a separate line without a comment symbol ("%") in front of it? If so, that is causing the error.

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Jos (10584) 2013-2-11

在 MATLAB Online 中打开

The editor is the program that you can use in matlab to edit m-files. At the command prompt, type:

>> edit

Truxton 2013-2-11

Cool! So I just put the function into the editor, then call it in the command window. awesome. Also, from the editor window I found the save as from the file menu. You helped me out soooo much! Thanks. Beleive it or not, im not a total noob with programming...ive taken a class or two, just its been a while.

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