[英]Converting python objects for rpy2
下面的代碼應該在 rpy2 中創建一個熱圖
import numpy as np
from rpy2.robjects import r
data = np.random.random((10,10))
r.heatmap(data)
但是,它導致以下錯誤
Traceback (most recent call last):
File "z.py", line 8, in <module>
labRow=rowNames, labCol=colNames)
File "C:\Python25\lib\site-packages\rpy2\robjects\__init__.py", line 418, in __call__
new_args = [conversion.py2ri(a) for a in args]
File "C:\Python25\lib\site-packages\rpy2\robjects\__init__.py", line 93, in default_py2ri
raise(ValueError("Nothing can be done for the type %s at the moment." %(type(o))))
ValueError: Nothing can be done for the type <type 'numpy.ndarray'> at the moment.
從文檔中我了解到 r.heatmap 需要“數字矩陣”。 如何將 np.array 轉換為所需的數據類型?
對於 rpy2 2.2.4,我必須添加:
import rpy2.robjects.numpy2ri
rpy2.robjects.numpy2ri.activate()
對我(2.2.1)來說,以下內容也有效(如http://rpy.sourceforge.net/rpy2/doc-2.2/html/numpy.html 上所述):
import rpy2.robjects as ro
from rpy2.robjects.numpy2ri import numpy2ri
ro.conversion.py2ri = numpy2ri
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