possible solution for #12

[codecov-io]

Codecov Report

Merging #13 into master will decrease coverage by 1.97%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #13      +/-   ##
==========================================
- Coverage   25.93%   23.95%   -1.98%     
==========================================
  Files           4        4              
  Lines         802      768      -34     
==========================================
- Hits          208      184      -24     
+ Misses        594      584      -10

Impacted Files	Coverage Δ
R/kknn.R	21.86% <0%> (-2.92%)	:arrow_down:

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[coveralls]

Pull Request Test Coverage Report for Build 34

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 18 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-2.0%) to 23.958%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
R/kknn.R	0	1	0.0%
<!--	Total:	0	1	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
R/kknn.R	18	21.87%
<!--	Total:	18		-->

Totals
Change from base Build 33:	-2.0%
Covered Lines:	184
Relevant Lines:	768

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💛 - Coveralls