Fix BUG: epochs.plot_image(evoked=False) doesn't show time in seconds #88… (#9115)

* BUG: epochs.plot_image(evoked=False) doesn't show time in seconds #8887. Additionally adapted the overly_times.

* Update latest.inc and names.inc

* fix underscore

* Update latest.inc

Added the replacement.

Co-authored-by: Stefan Appelhoff <[email protected]>

Author: matteoanelli

doc/changes/latest.inc

@@ -37,6 +37,8 @@ Current (0.23.dev0)
 
 .. |Valerii Chirkov| replace:: **Valerii Chirkov**
 
+.. |Matteo Anelli| replace:: **Matteo Anelli**
+
 Enhancements
 ~~~~~~~~~~~~
 - Add :meth:`mne.Dipole.to_mni` for more convenient  dipole.pos to MNI conversion (:gh:`9043` **by new contributor** |Valerii Chirkov|_)
@@ -117,6 +119,8 @@ Enhancements
 
 Bugs
 ~~~~
+- Fix bug with :func:`mne.Epochs.plot_image` where the ``x_label`` was different depending on the evoked parameter (:gh:`9115` **by new contributor** |Matteo Anelli|_)
+
 - Fix bug with restricting :func:`mne.io.Raw.save` saving options to .fif and .fif.gz extensions (:gh:`9062` by |Valerii Chirkov|_)
 
 - Fix bug with :func:`mne.io.read_raw_kit` where missing marker coils were not handled (:gh:`8989` **by new contributor** |Judy D Zhu|_)

doc/changes/names.inc

@@ -367,3 +367,5 @@
 .. _Judy D Zhu: https://github.com/JD-Zhu
 
 .. _Valerii Chirkov: https://github.com/vagechirkov
+
+.. _Matteo Anelli: https://github.com/matteoanelli

mne/viz/epochs.py

@@ -513,22 +513,24 @@ def _plot_epochs_image(image, style_axes=True, epochs=None, picks=None,
     # draw the image
     cmap = _setup_cmap(cmap, norm=norm)
     n_epochs = len(image)
-    extent = [1e3 * tmin, 1e3 * tmax, 0, n_epochs]
+    extent = [tmin, tmax, 0, n_epochs]
     im = ax_im.imshow(image, vmin=vmin, vmax=vmax, cmap=cmap[0], aspect='auto',
                       origin='lower', interpolation='nearest', extent=extent)
 
     # optional things
     if style_axes:
         ax_im.set_title(title)
         ax_im.set_ylabel('Epochs')
+        if not evoked:
+            ax_im.set_xlabel('Time (s)')
         ax_im.axis('auto')
         ax_im.axis('tight')
         ax_im.axvline(0, color='k', linewidth=1, linestyle='--')
 
     if overlay_times is not None:
-        ax_im.plot(1e3 * overlay_times, 0.5 + np.arange(n_epochs), 'k',
+        ax_im.plot(overlay_times, 0.5 + np.arange(n_epochs), 'k',
                    linewidth=2)
-        ax_im.set_xlim(1e3 * tmin, 1e3 * tmax)
+        ax_im.set_xlim(tmin, tmax)
 
     # draw the evoked
     if evoked: