Matlab computer code associated with the paper McFarland JM, Cui Y, Butts DA (2013) Inferring nonlinear neuronal computation based on physiologically plausible inputs. PLoS Comput Biol 9:e1003143 http://dx.doi.org/10.1371/journal.pcbi.1003143 and installation instructions are available at the authors web site: http://www.clfs.umd.edu/biology/ntlab/NIM/ The first demo program, NIMdemo_RGCsim.zip, for example reproduces figures 1 and 3 in the manuscript, e.g. figure 1C: ModelDB Administrator installation note: The files suggested to be installed from the above web runs under Matlab r2013a and Xcode 5.1.1 as long as the following revision is made to /Applications/MATLAB_R2013a.app/extern/include/tmwtypes.h: The line: typedef char16_t CHAR16_T; needed to be changed to typedef UINT16_T CHAR16_T; as suggested in a stackoverflow note to prevent the Matlab mexAll compilation error: ... /Applications/MATLAB_R2013a.app/extern/include/tmwtypes.h:819:9: error: unknown type name 'char16_t' typedef char16_t CHAR16_T; ^ 1 error generated. mex: compile of ' "minFunc/mcholC.c"' failed.