Sort data Matlab program errors.

Question

Oliver 2011-12-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/24296-sort-data-matlab-program-errors

Dear all,

I'm a newbie to Matlab programming and need some help. I wrote a program to sort the input data in ascending order. However, the functions did not work properly. Can you please shed some light? Thanks heaps.

Oliver.

nvals =input('Enter number of values in the data set: ');

array = zeros(nvals,1);

sorted = zeros(nvals,1);

for ii = 1:nvals

    string = ['Enter value ' int2str(ii) ': '];
    array(ii) = input(string);
end

sorted = ssort(array);

fprintf('\nSorted data: \n');

for ii = 1:nvals

fprintf(' %8.4f\n', sorted(ii));

end

function out = ssort(a)

for i=1:nvals

    if array(i)>array(i+1)
        sorted(i) = array(i+1);
        sorted(i+1) = array(i);
        array(i+1) = array(i);
    else
        sorted(i) = array(i);
    end
end

out = a;

*Errors are as follows: ??? Undefined function or method 'sorted' for input arguments of type 'double'.

Error in ==> test_ssort at 11 fprintf(' %8.4f\n', sorted(ii));

??? Error: File: test_ssort.m Line: 14 Column: 1 Function definitions are not permitted in this context.

??? Error: File: test_ssort.m Line: 17 Column: 1 Function definitions are not permitted in this context.

??? Error: File: test_ssort.m Line: 18 Column: 1 Function definitions are not permitted in this context.

??? Error: File: test_ssort.m Line: 18 Column: 1 Function definitions are not permitted in this context.*

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Answer 1

Wayne King 2011-12-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/24296-sort-data-matlab-program-errors#answer_31860

Looks like you are trying to define a function inside of a script, test_ssort.

You should save your ssort.m file into a folder that is on the MATLAB search path. Then you can call that function in your script. Remove the declaration of the function from the script.

However, I immediately see you have some problems with your function, ssort.m. You input, a, but then inside the function you work on array. That is not going to work, you should change the function definition to use array. Further, the last line

out = a;

is not going to work. There is nothing in the function assigned to out.