apply()
åapplymap()æ¯DataFrameæ°æ®ç±»åçå½æ°ï¼map()æ¯Seriesæ°æ®ç±»åçå½æ°ã
apply()çæä½å¯¹è±¡DataFrameçä¸åæè
ä¸è¡æ°æ®ï¼
applymap()æ¯element-wiseçï¼ä½ç¨äºæ¯ä¸ªDataFrameçæ¯ä¸ªæ°æ®ã
map()ä¹æ¯element-wiseçï¼å¯¹Seriesä¸çæ¯ä¸ªæ°æ®è°ç¨ä¸æ¬¡å½æ°ã
* apply works on a row / column basis of a DataFrame, applymap
works element-wise on a DataFrame, and map works element-wise on a
Series.
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