Problem 733. Extract Built In Functions and Toolbox Functions from String or Function Handle

Solution 3476094

Submitted on 30 Oct 2020 at 7:18

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Test	Status	Code Input and Output
1	Pass	fh_str='log2(x)+smooth3(x,y)+abs(2)+log10(5)'; exp_str='abs log10 log2 smooth3'; assert(isequal(find_functions(fh_str),exp_str))
2	Fail	fh_str='for k=log10(x):log2(x)+abs(x)'; exp_str='abs for log10 log2'; assert(isequal(find_functions(fh_str),exp_str)) Assertion failed.
3	Fail	fh_str=@(x)x^2+sin(x)-cos(x); exp_str='cos sin'; assert(isequal(find_functions(fh_str),exp_str)) Undefined function 'eq' for input arguments of type 'function_handle'. Error in find_functions (line 2) q1=find(fh_str == '('); Error in Test3 (line 3) assert(isequal(find_functions(fh_str),exp_str))
4	Fail	fh_str='@(x)x^2+sin(x)-cos(x)'; exp_str='cos sin'; assert(isequal(find_functions(fh_str),exp_str)) Array indices must be positive integers or logical values. Error in find_functions (line 25) if sum(find(num == fh_str2{p4}(end)))>1 Error in Test4 (line 3) assert(isequal(find_functions(fh_str),exp_str))
5	Pass	fh_str='filter2(x,A)+filter(x)-cos(x) expm(z)'; exp_str='cos filter expm filter2'; assert(isequal(find_functions(fh_str),exp_str))
6	Pass	fh_str='smooth3(x,y)-filter(x)+abs(n)+filter2(u)+sin(x)+numel(z)'; exp_str='abs filter numel sin filter2 smooth3'; assert(isequal(find_functions(fh_str),exp_str))

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