r - How to get count-of-a-count with dplyr? -

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मान लें कि हमारे पास डेटा फ्रेम है 

  df & lt; - data.frame (x = C ("a", "a", "b", "a", "c"))

dplyr गणना का उपयोग करते हुए, हमें 

  डीएफ% & gt;% गिनती (x) xn 1 a 3 2 b 1 3 c 1

अब मैं परिणामी n कॉलम पर गिनती करना चाहता हूं। यदि n कॉलम को मी नाम दिया गया था, तो परिणाम मैं देख रहा हूं 

  mn 1 1 2 2 3 1

यह कैसे किया जा सकता है Dplyr?

बहुत बहुत धन्यवाद!

dplyr गिनती (एन) ।

उदाहरण के लिए: 

  d & lt; - data.frame (n = नमूना 1: 2, 10, TRUE), x = 1:10) d% & gt;% गिनती (n)

एक वैकल्पिक नाम n नाम बदलने है: < प्रश्न संख्या (x)% & gt;% नाम बदलें (एम = एन)% & gt;% गिनती (एम) में परिभाषित डेटा का उपयोग करके / p> 

  df% & gt;%

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