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Introduction to machine learning -- Arg operation in numpy

2022-04-22 05:56:00 【Tchaikovsky】

Numpy Medium arg operation

Indexes

  • Find the minimum position index in the normal distribution matrix
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  • Find the maximum position index in the normal distribution matrix
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Sorting and using indexes

  • Upset x Elements in vectors
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call np.sort() and x.sort() There are two different results
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  • The two-dimensional matrix is sorted by column
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  • The two-dimensional matrix is sorted by row
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  • Returns the index value sorted from small to large
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  • np.partition(x, index) Pass in arrays and calibration points , The values on the left side of the calibration point are smaller than those at the calibration point ; The right side is larger than the value at the calibration point （ Unordered ）
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  • np.argpartition()
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  • For two-dimensional matrices ：
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