Error from Ryan [potential bug, tbd]

Hi Paolo,

Under the [velasquez@salk.edu](mailto:velasquez@salk.edu) account at [salk.metacell.us](http://salk.metacell.us/), the experiments Combined Populations 3 and Combined Populations 4 have the same input files but Combined Populations 3 has an error for the V2b cells.

For the section error, Rabies v3 has the error because there is only one slice in one of the sections while Rabies shifted fixed that by shifting the slices so that the lone slice moved into the next section (this experiment also seems to have the above problem with a neuron type having a seemingly random error). The source of this error appears to be cordmap.datal.utils.interpolate_atalas_section which assumes that the min and max value of z will be different.

@stephenlenzi email from Ryan about the error he mentioned yesterday during the call, when you have a chance could you please let us know what you think?
cc @afonsobspinto