Run a function into a function

Question

Adrian Quesada 2017-8-21

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回答： Adrian Quesada 2017-8-21

Hi I have a function "a" called "function x=problem1(a,b,c,d)" I would like to create a function "b" that call function "a" and asign values to (a,b,c,d). Also, the function "b" have to run at least 6 times just with one call.

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Answer 1

Adrian Quesada 2017-8-21

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No, I'm talking about a function to run replace_me 5 times with diferents inputs. Like this:

    % code
function problemb
1 try
v=[1 2 3 4];
a=2
b=8
c=6
end
2 try
v=[5 6 7 8];
a=6
c=2
end
3 try
v=[1 2 6 9];
a=2
b=8
c=6
end

In my example, I already define the inputs for each run, so, I just put both .m files together and run the problem one time to have 5 different solutions at once.

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Adrian Quesada 2017-8-21

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Thanks for your answer, one more question When I run your code, the answer is:

 % code
ans =
1×3 cell array
    [1×5 double]    [1×5 double]    [1×5 double]

How do I do to show the vectors?

Walter Roberson 2017-8-21

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celldisp(ans)

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Answer 2

Jan 2017-8-21

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编辑：Jan 2017-8-21

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The question is not really clear. I assume that this is very basic and suggest to read the Getting Started chapters to learn the fundamentals of programming. But here a suggestion:

function b
for k = 1:6
  a = rand;
  b = 17.3;
  c = k;
  d = a + b + c ^ 2;
  x = problem1(a,b,c,d);
  disp(x);
end

Now look at the code and explain, what your problem is with any details.

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Answer 3

Walter Roberson 2017-8-21

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Your question is not clear. Under one interpretation, you should see https://www.mathworks.com/matlabcentral/answers/353428-bad-cell-reference-with-cell-array-of-function-handles#answer_278631

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Answer 4

Adrian Quesada 2017-8-21

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https://ww2.mathworks.cn/matlabcentral/answers/353536-run-a-function-into-a-function#answer_278747

编辑：Adrian Quesada 2017-8-21

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Ok, I will try to explain it better. Supose I have the next code:

 % code
function w = replace_me(v,a,b,c)
    if nargin < 3
        b = 0;
    end
    if nargin < 4
        c = b;
    end
    w = [];
    for k = 1:length(v);
        if v(k) == a        % if a is found,
            w = [w,b,c];    % we insert b and c at the end of the current w
        else                % otherwise,
            w = [w,v(k)];   % we insert the original element of v
        end
    end
end

I will like to create another function that has the input parameters for "function w = replace_me(v,a,b,c)", but it has to try the code with 5 diferent input options at the same time.

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Walter Roberson 2017-8-21

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Your existing code already handles the possibility that v will be a vector of length 5. Your existing code has b and c be optional. Are you talking about 5 different a values? If so, then would it be acceptable to just change

if v(k) == a

to

if ismember(v(k), a)

?

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