I have the following problem:

I would like to plot a variable from a Dataframe with missing values, which are denoted as "NA". However, if I just go ahead and use with Pyplot 

```
x = df[df[:country] .== "Belgium",:year]
y = df[df[:country] .== "Belgium",:hpNormLog]
plot(x, y, "b-", linewidth=2)

```

I get the following error message:

> 
> 
> ```
> PyError (:PyObject_Call) <class 'TypeError'> TypeError("float() argument must be a string or a number, not 'PyCall.jlwrap'",)
> File "C:\Anaconda3\lib\site-packages\matplotlib\pyplot.py", line 3154, in plot
> ret = ax.plot(*args, **kwargs)   File "C:\Anaconda3\lib\site-packages\matplotlib\__init__.py", line 1811, in inner
> return func(ax, *args, **kwargs)   File "C:\Anaconda3\lib\site-packages\matplotlib\axes\_axes.py", line 1425, in plot
> self.add_line(line)   File "C:\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 1708, in add_line
> self._update_line_limits(line)   File "C:\Anaconda3\lib\site-packages\matplotlib\axes\_base.py", line 1730, in _update_line_limits
> path = line.get_path()   File "C:\Anaconda3\lib\site-packages\matplotlib\lines.py", line 925, in get_path
> self.recache()   File "C:\Anaconda3\lib\site-packages\matplotlib\lines.py", line 621, in recache
> y = np.asarray(yconv, np.float_)   File "C:\Anaconda3\lib\site-packages\numpy\core\numeri...
> 
> ```
> 
> 

I would be very grateful, if I had a solution around it.

Best,
Ilja