R，python：“'vmmin'中的初始值不是有限的”错误

Question

我试图通过rpy2在Python中使用R＆＃39的fitdistr：

x = MASS.fitdistr(np.asarray(myValues), "beta", start=startParams)

但我收到了这条消息：

Error in optim(x = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  : 
  initial value in 'vmmin' is not finite
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/rpy2/robjects/functions.py", line 82, in __call__
    return super(SignatureTranslatedFunction, self).__call__(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/rpy2/robjects/functions.py", line 34, in __call__
    res = super(Function, self).__call__(*new_args, **new_kwargs)
rpy2.rinterface.RRuntimeError: Error in optim(x = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  : 
  initial value in 'vmmin' is not finite

现在，我的数组中没有NaN，但只是仔细检查我运行了这个：

numpy.isfinite(myValues)

...在数组的每个值上返回True。

关于这里有什么问题的任何线索？