Fix CI failures (#329)

* fix plot and docs build

* try with ubuntu 22

* try with ubuntu 20

* try installing xcb

* debug

* try with QT_OFFSCREEN

* try with macos

* install control

* install gcc

* try to get fortran working

* try with no window

* address warning

.github/workflows/tests.yml

@@ -31,7 +31,8 @@ jobs:
           sudo apt-get install -qq octave octave-signal liboctave-dev
       - name: Generate coverage report
         run: |
-          pip install hatch; xvfb-run --auto-servernum hatch run cover:test
+          pip install -q hatch
+          hatch run cover:test
 
   check_release:
     runs-on: ubuntu-latest
@@ -43,7 +44,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
 
   docs:
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1

oct2py/io.py

@@ -353,7 +353,7 @@ def _encode(data, convert_to_float):  # noqa
 
     # Send None as nan.
     if data is None:
-        return np.NaN
+        return np.nan
 
     # Sets are treated like lists.
     if isinstance(data, set):