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<p>扫描<a href="http://docs.scipy.org/doc/numpy/reference/routines.ma.html#to-a-ndarray" rel="nofollow">the masked array operations page</a>会显示<code>np.ma.filled</code>执行了您要查找的内容。例如</p>
<pre><code>import numpy as np
arr = np.arange(2*3*4).reshape(2,3,4).astype(float)
mask = arr % 5 == 0
marr = np.ma.array(arr, mask=mask)
print(np.ma.filled(marr, np.nan))
</code></pre>
<p>收益率</p>
^{pr2}$
<hr/>
<p>或者,可以使用掩码数组的<a href="http://docs.scipy.org/doc/numpy/reference/generated/numpy.ma.MaskedArray.filled.html#numpy-ma-maskedarray-filled" rel="nofollow">^{<cd2>}
method</a>。<code>marr.filled(np.nan)</code>相当于{<cd4>}。在</p>