Problem 566. Sum of first n terms of a harmonic progression

Solution 1403212

Submitted on 3 Jan 2018

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John on 3 Jan 2018

Why am I getting the following message:

Undefined function 'roundn' for input arguments of type 'double'.

Test	Status	Code Input and Output
1	Pass	a=1;d=1;n=1; y_correct = 1; assert(isequal(harmonicSum(a,d,n),y_correct));
2	Fail	a=2;d=2;n=5; y_correct = roundn(3.5746,-4); assert(isequal(roundn(harmonicSum(a,d,n),-4),y_correct)); Undefined function 'roundn' for input arguments of type 'double'. Error in Test2 (line 2) y_correct = roundn(3.5746,-4);
3	Fail	a=4;d=5;n=2; y_correct = roundn(4.6667,-4); assert(isequal(roundn(harmonicSum(a,d,n),-4),y_correct)); Undefined function 'roundn' for input arguments of type 'double'. Error in Test3 (line 2) y_correct = roundn(4.6667,-4);

Test

Status

Code Input and Output

Pass

a=1;d=1;n=1; y_correct = 1; assert(isequal(harmonicSum(a,d,n),y_correct));

Fail

a=2;d=2;n=5; y_correct = roundn(3.5746,-4); assert(isequal(roundn(harmonicSum(a,d,n),-4),y_correct));

Undefined function 'roundn' for input arguments of type 'double'. Error in Test2 (line 2) y_correct = roundn(3.5746,-4);

Fail

a=4;d=5;n=2; y_correct = roundn(4.6667,-4); assert(isequal(roundn(harmonicSum(a,d,n),-4),y_correct));

Undefined function 'roundn' for input arguments of type 'double'. Error in Test3 (line 2) y_correct = roundn(4.6667,-4);