[SPARK-12029][SPARKR] Improve column functions signature, param check, tests, fix doc and add examples#10019
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felixcheung wants to merge 3 commits intoapache:masterfrom
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[SPARK-12029][SPARKR] Improve column functions signature, param check, tests, fix doc and add examples#10019felixcheung wants to merge 3 commits intoapache:masterfrom
felixcheung wants to merge 3 commits intoapache:masterfrom
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Commits on Nov 27, 2015
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