How to make the modfunc function work ?

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Dionysios
Dionysios 2023-2-19
回答： Rik 2023-2-19
I have problem with the modfunc function. I get this erroe message: function out = modfunc(Population, Year)
↑
Error: Function definition are not supported in this context. Functions can only be created as local or nested functions in code files.
Also note that I am writing in live script and I wrote the modfunc function in a different live script. Additionally, the plots work, but the the line does not appear.
My code is as follows:
% Fit an exponential function to the data
function out = modfunc(Year,Population)
out = Population(1)*exp(Population(2)*Year);
% Plot the data and the fitted function on a semi-log scale
ain=[0.3 0.3];
figure
subplot(1,2,1)
plot(Population.Year,Population.Population,'o')
hold on
plot(Population,modfunc(Population,ain),'k','LineWidth',3)
subplot(1,2,2)
semilogy(Population.Year,Population.Population,'o')
hold on
semilogy(Population,modfunc(Population,ain),'k','LineWidth',3)
xlabel('Year');
ylabel('Population');
title('World Population with Exponential Fit');
legend('Data', 'Exponential Fit');

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回答（1 个）

Rik
Rik 2023-2-19
A function should exist in an m file. If you want to put it in a script file, it needs to have a closing end keyword, and no other code (except for other function) may exist after it. The error you posted indicates you have not met these requirements.

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