Image plot raises `ValueError: cannot convert float NaN to integer` with the air dataset

[maximlt]

import xarray as xr
import hvplot.xarray  # v0.7.3

airtemps = xr.tutorial.open_dataset("air_temperature")
air = airtemps.air  # 3D DataArray
air.isel(time=0).hvplot()  # runs fine and returns an Image plot
air.isel(lat=0).hvplot()  # raises a ValueError!
air.isel(lon=0).hvplot()  # raises a ValueError!
air.isel(lon=0).plot()  # runs fine with the xarray plot method

Warning raised:

/Users/mliquet/miniconda3/envs/holoviz37/lib/python3.7/site-packages/holoviews/core/util.py:2079: RuntimeWarning: invalid value encountered in true_divide
  return length/diff

Traceback:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-7-3f937c8403fa> in <module>
      4 airtemps = xr.tutorial.open_dataset("air_temperature")
      5 air = airtemps.air
----> 6 air.isel(lat=0).hvplot.image()

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/hvplot/plotting/core.py in image(self, x, y, z, colorbar, **kwds)
    646             The HoloViews representation of the plot.
    647         """
--> 648         return self(x, y, z=z, kind='image', colorbar=colorbar, **kwds)
    649 
    650     def rgb(self, x=None, y=None, z=None, bands=None, **kwds):

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/hvplot/plotting/core.py in __call__(self, x, y, kind, **kwds)
     77                 return pn.panel(plot, **panel_dict)
     78 
---> 79         return self._get_converter(x, y, kind, **kwds)(kind, x, y)
     80 
     81     def _get_converter(self, x=None, y=None, kind=None, **kwds):

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/hvplot/converter.py in __call__(self, kind, x, y)
   1135                         dataset = Dataset(data)
   1136                     dataset = dataset.redim(**self._redim)
-> 1137                 obj = method(x, y)
   1138                 obj._dataset = dataset
   1139 

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/hvplot/converter.py in image(self, x, y, z, data)
   1857         element = self._get_element('image')
   1858         if self.geo: params['crs'] = self.crs
-> 1859         return element(data, [x, y], z, **params).redim(**redim).opts(**opts)
   1860 
   1861     def rgb(self, x=None, y=None, z=None, data=None):

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/holoviews/element/raster.py in __init__(self, data, kdims, vdims, bounds, extents, xdensity, ydensity, rtol, **params)
    324             xdensity = xdensity if xdensity else util.compute_density(l, r, dim1, self._time_unit)
    325             ydensity = ydensity if ydensity else util.compute_density(b, t, dim2, self._time_unit)
--> 326         SheetCoordinateSystem.__init__(self, bounds, xdensity, ydensity)
    327         if non_finite:
    328            self.bounds = BoundingBox(points=((np.nan, np.nan), (np.nan, np.nan)))

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/holoviews/core/sheetcoords.py in __init__(self, bounds, xdensity, ydensity)
    164         self.lbrt = np.array(bounds.lbrt())
    165 
--> 166         r1,r2,c1,c2 = Slice._boundsspec2slicespec(self.lbrt,self)
    167         self.__shape = (r2-r1,c2-c1)
    168 

~/miniconda3/envs/holoviz37/lib/python3.7/site-packages/holoviews/core/sheetcoords.py in _boundsspec2slicespec(boundsspec, scs)
    517 
    518         l_idx = int(np.ceil(l_m-0.5))
--> 519         t_idx = int(np.ceil(t_m-0.5))
    520         # CBENHANCEMENT: Python 2.6's math.trunc()?
    521         r_idx = int(np.floor(r_m+0.5))

ValueError: cannot convert float NaN to integer

[Mycroft0121]

I ran into the same issue with a gray image