Thanks Randy that's really helpful. Answering my own question: yes it is volume - I found this https://github.com/MathCancer/PhysiCell/blob/master/BioFVM/BioFVM_microenvironment.cpp#L830-L833
static int oxygen_index = microenvironment.find_density_index( "oxygen" ); std::cout << "\nOxygen Index: " << oxygen_index << std::endl; static int chemoattractant_index = microenvironment.find_density_index( "chemoattractant" ); std::cout << "\nChemoattractant Index: " << chemoattractant_index << std::endl; gives Oxygen Index: 0 Chemoattractant Index: 1 Is there somewhere in the manual that talks about what is stored in the matlab files?
Structure of Matlab Files
Actually I am not sure whether sourceforge is a copy of git or vice versa. Where should I raise tickets? I found this: https://github.com/idontgetoutmuch/PhysiCell/blob/master/BioFVM/BioFVM_MultiCellDS.h#L191-L200 which suggests that I will have to implement read_BioFVM_to_MultiCellDS_xml_pugi myself?
I'm going to make a copy of this on github
Restart a simulation from where it stopped