stats do not work with nans in the fits file

[bennahugo]

Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 1966, in _measureRuler
    tiptext += f"   x={x} y={y} value=blank" % (x, y) if flag else f"   x={x} y={y} value={val:.6g}"
TypeError: not all arguments converted during string formatting
Traceback (most recent call last):
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 2298, in _selectRectStats
    self._selectImageSubset(zoomrect, image)
  File "/home/hugo/workspace/tigger/TigGUI/Plot/SkyModelPlot.py", line 2254, in _selectImageSubset
    stats = self._imgman.getLMRectStats(self._image_subset)
  File "/home/hugo/workspace/tigger/TigGUI/Images/Manager.py", line 474, in getLMRectStats
    return self._imagecons[0].renderControl().getLMRectStats(rect)
  File "/home/hugo/workspace/tigger/TigGUI/Images/RenderControl.py", line 374, in getLMRectStats
    mmin, mmax = measurements.extrema(subset, labels=mask, index=None if mask is None else False)[:2]
  File "/home/hugo/workspace/venvtiggernew/lib/python3.6/site-packages/scipy/ndimage/measurements.py", line 1316, in extrema
    find_max_positions=True)
  File "/home/hugo/workspace/venvtiggernew/lib/python3.6/site-packages/scipy/ndimage/measurements.py", line 819, in _select
    return single_group(input[mask], masked_positions)
  File "/home/hugo/workspace/venvtiggernew/lib/python3.6/site-packages/scipy/ndimage/measurements.py", line 790, in single_group
    result += [vals.min()]
  File "/home/hugo/workspace/venvtiggernew/lib/python3.6/site-packages/numpy/core/_methods.py", line 43, in _amin
    return umr_minimum(a, axis, None, out, keepdims, initial, where)
ValueError: zero-size array to reduction operation minimum which has no identity

Need to explicitly check if none finite and use nanstats