Problem 582. Function composition - harder

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Write a function that accepts an arbitrary number of function handles f_1, f_2, ..., f_n and returns the composition h. That is,

h = (f_1 o f_2 o ... o f_n)(x) = f_1(f_2( ... f_n(x) ... ))

Example:

>> f1 = @(x)x+1;
>> f2 = @(x)3*x;
>> f3 = @sqrt;
>> h = composeFcn(f1,f2,f3);
>> h(9)
ans =
  10

because 3*sqrt(9)+1 = 10.

You can assume that there will always be at least one input passed to the composeFcn function.

Solve

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Last solution submitted on Dec 26, 2018

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Daniel Pereira on 7 Feb 2017

"compose" is a built-in Matlab function.
Please, change the function name in the test suite, since no new solution is allowed.

Solution Comments

Solution 1114522

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2 Comments

Daniel Pereira on 2 Feb 2017

This problema keeps returning an error which, to my understanding, does not make sense, since my function has only 5 lines.

Error using compose (line 85) First argument must be a string array, character vector, or cell array of character vectors. Error in TestPoint1 (line 4) h = compose(f1,f2,f3);

David Hruska on 3 Mar 2017

Apologies for the trouble! I have renamed to the function to "composeFcn" to avoid clashing with the MATLAB "compose" function. Give it a try now.

Solution 181595

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1 Comment

bainhome on 11 Apr 2015

it took me almost half an hour to get how this programm work.impressive!

Problem 582. Function composition - harder

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Problem 582. Function composition - harder

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