(a) Three evaluation metrics, i.e., localization error (1st row), orientation error (2nd row), and strength percentage (3rd row), of five L1‐norm GMNEs in noiseless case. The simulated sources were at voxels on a selected slice along z‐axis. (b) Whisker plots for three metrics obtained from the simulation results shown in (a) with total 372 samples. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]