Run a function into a function

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.

Answer 1

[Adrian Quesada]

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.

[Walter Roberson]

function output = problemb
  V = {[1 2 3 4], [5 6 7 8], [1 2 6 9]};
  A = {2, 6, 2};
  B = {8, 0, 8};
  C = {6, 2, 6};
  output = replace_me2(V, A, B, C);

function output = replace_me2(V, A, B, C)
  output = cellfun(@(v,a,b,c) replace_me(v, a, b, c), V, A, B, C, 'uniform', 0);

[Adrian Quesada]

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]

celldisp(ans)

Answer 2

[Jan]

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.

Answer 3

[Walter Roberson]

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

Answer 4

[Adrian Quesada]

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.

[Walter Roberson]

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)

?

Answer 5

[Adrian Quesada]

Thaks for your help