Function definitions are not permitted in this context.

Question

gleice de Aguiar 2019-1-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/439619-function-definitions-are-not-permitted-in-this-context

评论： Walter Roberson 2019-1-14

Meu codigo diz que a funçao não é permitida

close all;
load lawdata
rng default 
a = imread('Fig5.jpg');
b = imread('Fig4.jpg');
a_red = a(:,:,1);
b_red = b(:,:,1); 
%imagem completa, i.e., a media de todas as linhas
for i=1:length(a_red(1,:)),
    aux(i) = mean (a_red(:,i));
    aux_b(i) = mean(b_red(:,i));
    pixel (i) = i;
end
figure, plot (aux,'r');
hold on;
plot (aux_b,'b');
hold off;
title('Curva SPR')
legend('Figura4','Figura5');
%bootstrap  
for i = 1:length(a_red(1,:)),
    [bootstat,bootsam] = bootstrp_f(2000,a_red(:,1));
    [bootstat,bootsam] = sort(m, 'ascend');
    bootstat(1,:)
    sup(i) = m(1950);
    inf(i) = m(90);
end
% 2000, sup = 1950 e inf = 50
% 1000, sup=975, inf = 25
% 100, sup=97, inf = 3
% 500, sup = 487, inf = 13
% 700, sup= 682, inf=18
function[mm] = bootstrp_f(B, dados)
mm = zeros(B,1);
for i=1:B,
    mm(i) = mean(datasample(dados, length(dados)));
end
end
[ma, ia] = min(aux(80:160));
[mb, ib] = min(sup(80:160));
abs(ia-ib); % valor absoluto
figure, histogram(bootstat)
se = std(bootstat);
se = 0.1285;
hold on;
hold off;
mm = bootstrp_f(2000,@mean,y);
figure;
[ia,ib] = ksdensity(mm);
figure, plot(ia,ib);
hold on;
hold off;
figure , plot(min(sup));
hold on;
hold off;

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Answer 1

Cris LaPierre 2019-1-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/439619-function-definitions-are-not-permitted-in-this-context#answer_356253

编辑：Cris LaPierre 2019-1-14

在 MATLAB Online 中打开

Functions must be placed at the very bottom of your script or in a separate file. Try this:

close all;
load lawdata
rng default 
a = imread('Fig5.jpg');
b = imread('Fig4.jpg');
a_red = a(:,:,1);
b_red = b(:,:,1); 
%imagem completa, i.e., a media de todas as linhas
for i=1:length(a_red(1,:))
    aux(i) = mean(a_red(:,i));
    aux_b(i) = mean(b_red(:,i));
    pixel (i) = i;
end
figure; plot(aux,'r')
hold on
plot(aux_b,'b')
hold off
title('Curva SPR')
legend('Figura4','Figura5')
%bootstrap  
for i = 1:length(a_red(1,:))
    [bootstat,bootsam] = bootstrp_f(2000,a_red(:,1));
    [bootstat,bootsam] = sort(m, 'ascend');
    bootstat(1,:)
    sup(i) = m(1950);
    inf(i) = m(90);
end
[ma, ia] = min(aux(80:160));
[mb, ib] = min(sup(80:160));
% #### This value is not captured in a variable ####
abs(ia-ib); % valor absoluto
figure; histogram(bootstat)
se = std(bootstat);
se = 0.1285;
hold on
hold off
mm = bootstrp_f(2000,@mean,y);
figure
[ia,ib] = ksdensity(mm);
figure; plot(ia,ib)
hold on
hold off
figure; plot(min(sup))
hold on
hold off
%%
function[mm] = bootstrp_f(B, dados)
mm = zeros(B,1);
for i=1:B
    mm(i) = mean(datasample(dados, length(dados)));
end
end

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Cris LaPierre 2019-1-14

I didn't look close enough. This function call syntax is incorrect

mm = bootstrp_f(2000,@mean,y);

There are too many inputs (bootstrp_f has 2 inputs), the variable y doesn't exist, and you are trying to pass in a function, something your function doesn't support.

Better to try

mm = bootstrp_f(2000,mean(<varname>));

Walter Roberson 2019-1-14

note how Cris added an extra end statement . When you define a function inside a script then every function must have a corresponding end statement .

however in the case where the function is in the correct location in a script but is missing the end statement then it is a different error message you would get.

The error message observed occurs in two circumstances:

you tried to define a function at the command prompt .That is not permitted in any MATLAB release and is not likely to be implemented any time soon.
you tried to define a function inside a script in a release before r2016b . Before that function statements could never appear in scripts I suspect this is cause of your message .

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