使用 rpy2 创建临时数据帧:内存问题 [英] Create temporary dataframe with rpy2: memory issue
问题描述
这个问题与我的上一个类似但更简单.这是我使用 rpy2 从 python 创建 R 数据帧的代码:
This question is similar to but simpler than my previous one. Here is the code that I use to create R dataframes from python using rpy2:
import numpy as np
from rpy2 import robjects
Z = np.zeros((10000, 500))
df = robjects.r["data.frame"]([robjects.FloatVector(column) for column in Z.T])
我的问题是重复使用它会导致巨大的内存消耗.我试图从这里中调整这个想法,但没有成功.如何在不逐渐使用我所有内存的情况下将许多 numpy 数组转换为数据帧以供 R 方法处理?
My problem is that using it repetitively results in huge memory consumption. I tried to adapt the idea from here but without success. How can I convert many numpy arrays to dataframe for treatment by R methods without gradually using all my memory?
推荐答案
您应该确保您使用的是最新版本的 rpy2.使用 rpy2 2.4.2 版,以下效果很好:
You should make sure that you're using the latest version of rpy2. With rpy2 version 2.4.2, the following works nicely:
import gc
import numpy as np
from rpy2 import robjects
from rpy2.robjects.numpy2ri import numpy2ri
for i in range(100):
print i
Z = np.random.random(size=(10000, 500))
matrix = numpy2ri(Z)
df = robjects.r("data.frame")(matrix)
gc.collect()
我的计算机上的内存使用量从未超过 600 MB.
Memory usage never exceeds 600 MB on my computer.
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