Function definitions are not permitted at the prompt or in scripts

Question

amina 2012-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/30044-function-definitions-are-not-permitted-at-the-prompt-or-in-scripts

评论： Image Analyst 2016-3-12

I need help in running this project http://students.olin.edu/2012/jatkinson/poe/

i have made these four .m files but when i try to run them this error is displayed 'Function definitions are not permitted at the prompt or in scripts'

i read this in a solution to form .m file for the functions separately but then again the same msg was displayed....

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Oleg Komarov 2012-2-23

Then you didn't erase the functions from the scripts.

amina 2012-2-23

can u plz check the link and guide me what am i supposed to do in order to run those commands...i'm new to matlab and don't really know what is a script...

i have made 4 .m file(getAI,fftAI,man,ext) separately

when i run fftAI.m this error msg is displayed..i have made a .m file for the function appearing in fftAI.m'function [f, mag] = localDaqfft(data, Fs, blockSize)'named localDaqfft.m .....where i am going wrong

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Answer 1

Walter Roberson 2012-2-23

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In a function file, you can start with any number of blank lines and comment lines, but after that the very first line has to be a "function" line. If you have anything else at all (other than blanks / comments) before the "function" line, then MATLAB will consider the file to be a "script".

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Answer 2

Kevin Holst 2012-2-23

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在 MATLAB Online 中打开

If I'm reading your website correctly, you're saying that this is a script named fftAI.m:

[d, time] = getdata(ai, ai.SamplesPerTrigger); 
[f, mag] = localDaqfft(d,Fs,blockSize);
data.getdata = [d time];
function [f, mag] = localDaqfft(data, Fs, blockSize)
xFFT = fft(data);
xfft = abs(xFFT);
index = find(xfft == 0);
xfft(index) = 1e-17;
mag = 20*log10(xfft);
mag = mag(1:blockSize/2);
f = (0:length(mag)-1)*Fx/blockSie;
f = f(:);

you can't have function call outs in scripts like that. localDaqfft will need to be it's own m file.

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Answer 3

MOHIT SAXENA 2016-3-12

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编辑：MOHIT SAXENA 2016-3-12

function bw=adaptivethreshold(IM,ws,C,tm) if (nargin<3) error('You must provide the image IM, the window size ws, and C.'); elseif (nargin==3) tm=0; elseif (tm~=0 && tm~=1) error('tm must be 0 or 1.'); end

IM=mat2gray(IM);

if tm==0 mIM=imfilter(IM,fspecial('average',ws),'replicate'); else mIM=medfilt2(IM,[ws ws]); end sIM=mIM-IM-C; bw=im2bw(sIM,0); bw=imcomplement(bw); I m getting the same error.what should I do?

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Image Analyst 2016-3-12

MOHIT, start your own question and give the function, the line of code and parameter values you used to call it, and your image. But first read this and this and this.

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