python升维函数

在Python中，用于升维的函数是来自sklearn.preprocessing库的PolynomialFeatures函数。该函数可以将特征矩阵转换为更高维度的多项式特征矩阵。[1]

此外，numpy库中的ufunc（通函数）也可以用于对数组进行升维操作。ufunc是一种可以像执行标量运算一样执行数组运算的函数，通过隐式的循环对各个位置依次进行标量运算。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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