Bug report: std_erspplot function when drawing 2 by 2 conditions using channel data

[sato16]

Dear EEGLAB manager,
Thank you for developing and maintaining a great toolbox. I may be wrong but I found a bug in std_erspplot function so I would like to share the information.

Description

Issue

When I try to plot ersp topomap in channel data at 2 by 2 conditions, the plot of statistical results seems incorrect. In addition, this bug may relate to https://sccn.ucsd.edu/pipermail/eeglablist/2022/016748.html

Reproducing bug

I reproduced the bug by using 5-subject experiment tutorial data, so I attached mlx file.
plot_ERSPtest_2by2.mlx.zip

Cause of the bug

The solution seems to pass stat.effect as argument. In particular, [line 391 in std_erspplot.m] should be changed as below

• before:

std_chantopo(allersp, 'groupstats', pgroup, 'condstats', pcond, 'interstats', pinter, 'caxis', opt.caxis, ...
'chanlocs', locs, 'threshold', alpha, 'titles', alltitles);

• after:

 std_chantopo(allersp, 'groupstats', pgroup, 'condstats', pcond, 'interstats', pinter, 'caxis', opt.caxis, ...
'chanlocs', locs, 'threshold', alpha, 'titles', alltitles, 'effect', stats.effect);

Versions

OS version	[mac Monterey version 12.6]
Matlab version	[matlab 2023b]
EEGLAB version	[EEGLAB 2024.0]

I hope this will be useful to you.
Best regards,
Fumiaki Sato