将python对象传递给rpy2中的R函数

Question

我正在使用Python 2在Jupyter笔记本中工作，并希望使用rpy2绘制热图。

import numpy as np
from rpy2 import robjects
from rpy2.robjects import r, pandas2ri
from rpy2.robjects import Formula, Environment
from rpy2.robjects.vectors import IntVector, FloatVector
from rpy2.robjects.lib import grid
from rpy2.robjects.packages import importr, data
from rpy2.rinterface import RRuntimeError
import warnings


a = np.array([1.5,2.3])
b = np.array([4.2,5.1])
c = np.array([[0.3, 0.6],[0.6, 0.3]])

r.image.plot(a,b,c)

给我错误

AttributeError: 'SignatureTranslatedFunction' object has no attribute 'plot'

如何正确将参数传递给此函数？ 规格：带有R3.3.3和Python 2.7的rpy2 2.5.6

Answer 1

那是行不通的，因为image.plot显然来自package fields 。 使用image从基础R的graphics库，做到这如：

import numpy as np
from rpy2.robjects.packages import importr
from rpy2.rinterface import RRuntimeError
import rpy2.robjects.numpy2ri
from IPython.display import Image, display
from rpy2.robjects.lib import grdevices

rpy2.robjects.numpy2ri.activate()
grf = importr('graphics')

a = np.array([1.5,2.3])
b = np.array([4.2,5.1])
c = np.array([[0.3, 0.6],[0.6, 0.3]])

with grdevices.render_to_bytesio(grdevices.png, width=1024, height=896, res=150) as img:
    grf.image(a, b, c)
display(Image(data=img.getvalue(), format='png', embed=True))

给

要使用image.plot ，您必须运行

fields = importr('fields')

并将grf.image(a, b, c)替换为fields.image.plot(a, b, c)