Hi all, Recently Catherine said that she had a model that was running but not producing the right output. Instead of producing a train of spikes, it was just producing some kind of curve flattening off at an asymptote. Then when she changed some units on a relevant variable from dimensionless to the right units, she got the nice spiking output.
As for myself, I've been looking at a model which has both a normal version and a scaled/non-dimensionalized version. When I consulted him about the output I was getting and which equations I should be using from his paper, the model author suggested that I use the non-dimensionalised set of equations, since the model describes a very stiff problem, and as such, that is what the ND'd equations are there for. Wheras before I was just getting curves that looked nothing like I want, I am now getting trains of spikes. I realise the first example might be slightly different from the first (damn I am sick of people who don't know how to write English, the Americans, that is, telling me I need a 'z' everywhere!) but... The point/question I want to raise here, is how does PCEnv / other simulators treat units? Is it possible that some of the models in the repository simply don't run or produce the right outputs because of the units? If so, this would be news to me! It would also be frustrating given the number of times we have to guess or spend hours poring over equations trying to work out the units of a variable. Thanks, James Lawson _______________________________________________ cellml-discussion mailing list [email protected] http://www.cellml.org/mailman/listinfo/cellml-discussion
