NumPyæ¯Pythonç§å¦è®¡ç®çåºç¡å
ãå®æä¾äºå¤ç»´æ°ç»å¯¹è±¡ãåºäºæ°ç»çåç§æ´¾ç对象ï¼ä¾å¦ï¼masked Array, ç©éµï¼ãé¤æ¤ä¹å¤ï¼è¿æä¾äºåç§åæ ·çå å¿«æ°ç»æä½çä¾ç¨ï¼å
æ¬æ°å¦åºæ¬è®¡ç®ãé»è¾ãå¾å½¢æä½ãæåºãéæ©ãè¾å
¥è¾åºï¼ç¦»æ£
å
ç«å¶åæ¢ãåºç¡
线æ§ä»£æ°ãåºç¡ç»è®¡æä½ãéæºä»¿çççã
NumPyçæ ¸å¿æ¯ndarray对象ãä¸æ¹é¢ï¼Ndarray对象å°è£
äºå¯ä»¥å
å«ç¸å
æ°æ®ç±»åçå¤ç»´æ°ç»ï¼å¦ä¸æ¹é¢ï¼ä¸ºè·å¾æ´å¥½çæ§è½ï¼ å¨ndarrayä¸çæä½é½æ¯å¨ç¼è¯è¿ç代ç ä¸æ§è¡çãæ¤å¤ï¼åPythonèªèº«çåºå对象ç¸æ¯ï¼ä¸¤è
ä¹é´æå¦ä¸ä¸åï¼
1. NumPyæ°ç»ç大å°æ¯åºå®çãPythonçListæ¯å¯ä»¥å¨æå¢é¿çãæ¹åNumPyç大å°ä¼éæ°å建ä¸ä¸ªæ°çæ°ç»å¹¶æåæ¥çå æã
2. NumPyæ°ç»ä¸çå
ç´ ä¸å®æ¯åä¸ç±»åçãï¼ç¸åºå°ï¼æ¯ä¸ªå
ç´ æå çå
å大å°ä¹æ¯ä¸æ ·çãï¼ä¾å¤æ
åµæ¯ï¼ï¼ä¸æ¯ç¹å«ç解ï¼one can have arrays of (Python, including NumPy) objects, thereby allowing for arrays of different sized elements.ï¼
3. NumPyæ°ç»æ¯æå¨å¤§éæ°æ®ä¸è¿è¡æ°å¦è®¡ç®åå
¶ä»ç±»åçæä½ãé常æ
åµä¸ï¼ä¸Pythonèªå¸¦çåºåç±»åç¸æ¯ï¼NumPyæ°ç»ä¸çæä½æ§è¡æ´é«æï¼ä»£ç éä¹æ´å°ã
4. è¶æ¥è¶å¤çPythonç§å¦è®¡ç®å
é½æ¯ç¨å°äºNumPyçæ°ç»ï¼è½ç¶è¿äºåºæ¯æPythonåºåç±»åçè¾å
¥ï¼ä½æ¯å
é¨æä½è¿æ¯è¦å
å°å
¶è½¬æ¢ä¸ºNumPyçæ°ç»ç±»åï¼èä¸è¾åºé常就æ¯NumPyæ°ç»ãæ以ï¼å¦æä½ æ³è¦é«æå°ä½¿ç¨è¿äºPythonçç§å¦è®¡ç®å
ï¼ä»
ä»
ç¥éPythonå
建çåºåç±»åæ¯ä¸å¤çï¼ä½ è¿éè¦ç¥éå¦ä½ä½¿ç¨NumPyæ°ç»ã
æåï¼NumPyå®å
¨æ¯æé¢å对象çèå¼ãä¾å¦ï¼ndarrayæ¯ä¸ä¸ªç±»ï¼å®æ¥æ许å¤æ¹æ³åå±æ§ãå®ç许å¤æ¹æ³é½æ å°å°äºæå¤å±çNumPy
å½å空é´çå½æ°éãè¿æ ·ä¸æ¥ï¼å°±å¯ä»¥ç»ç¨åºåæ´å¤çèªç±ï¼ç¨åºåå¯ä»¥èªç±éè
æ¯é¢å对象çæ¹å¼è¿æ¯
é¢åè¿ç¨çæ¹å¼ä½¿ç¨è¿äºæ¥å£ã