Version 1.13.0.dev37+g3455d64a9 (development) (2026-05-01)#

Bugfixes#

Fix mode parameter in get_point_spread() and get_cross_talk() to correctly map public mode names ('max', 'svd') to internal names, expose previously hidden modes 'sum' and 'maxval' in the public API, and raise ValueError for invalid mode values, by new contributor Famous077. (#13754)
Improved colocated OPM topomap handling by recognizing additional OPM coil types (FieldLine and Kernel), by Pragnya Khandelwal. (#13825)
Fix bug where logging messages were sometimes errantly printed, by Eric Larson. (#13843)
Fixed incorrect label orientation for nodes in the 0–90° polar range (the 12–3 o’clock quadrant) of the connectivity circle plot, by new contributor Pavel Popov. (#13855)
Fixed an indexing bug in fNIRS support in mne.io.BaseRaw.interpolate_bads() (and related methods) that could errantly use incorrect donor channels, by new contributor Kalle Makela. (#13856)
Add a memmap keyword argument to mne.io.BaseRaw.load_data(), allowing loading deferred raw data into a memory-mapped file after object creation, by Aniket Singh Yadav. (#13858)
Improved error message when FreeSurfer executable is not found, by new contributor Ayushi Satodiya. (#13874)

It is now possible to concatenate raw objects with mne.concatenate_raws() as long as they inherit from BaseRaw, even if their specific types differ (e.g., Raw and RawArray), by Clemens Brunner. (#13263)
Add a preprocessing example showing how to explore epoch quality before rejection using robust statistics (peak-to-peak amplitude, variance, and kurtosis) inspired by FASTER (Nolan et al., 2010) and Delorme et al. (2007), by Aman Srivastava. (#13710)
Add annotation_colors parameter to mne.io.Raw.plot() and mne.Epochs.plot() to allow users to specify custom colors for annotations by passing a dict mapping annotation description strings to colors (for example, annotation_colors=dict(bad_segment="orange")), by Clemens Brunner. (#13838)
Add dark theme support (theme="light", "dark", or "auto") to the 'matplotlib' browser backend used by mne.io.Raw.plot(), mne.Epochs.plot(), and mne.preprocessing.ICA.plot_sources(), by Clemens Brunner. (#13861)

Reorganized EDF submodule structure by moving private functionality into the public mne.io namespace to improve module consistency and avoid exposing private modules in the Credits page, by Aniket Singh Yadav. (#13673)
Remove numpy.ndarray from colormap parameter in mne.viz.plot_source_estimates() to solve documentation conflict , by new contributor Lifeng Qiu Lin. (#13797)
Added regression coverage for colocated triaxial OPM topomap handling in plot_joint() and ICA.plot_components(), by Pragnya Khandelwal. (#13842)
Added a helper to split colocated OPM overlap sets into radial and tangential channel groups, and updated topomap regression coverage to use shared triaxial OPM fixtures, by Pragnya Khandelwal. (#13847)