Author response image 3. We used the Y-shaped morphology and the 4x4 electrode setup to investigate the effect of using various basis numbers for the reconstruction.

L1 error was calculated to compare the results for basis with 32, 128, 256, 512, 1024 elements (M), for several values of basis width (R) and λ. As shown, using few and narrow basis functions can lead to poor reconstruction, but covering the morphology with a sufficient number of basis functions of reasonable width (on the order of L/M with L being the total dendritic length) significantly improves the reconstruction (reduces the error).