Fitting kinetic models to chemical degradation data (also on github) https://erac.jrwb.de/mkin/atom?h=v0.9.43 2016-04-21T15:37:54Z 2016-04-21T15:37:54Z Johannes Ranke jranke@uni-bremen.de 2016-04-21T15:34:38Z urn:sha1:0b36fb666b84321814eabbc1a25687ee70d789e6 mkinfit: Do not error out in cases where the fit converges, but the Jacobian for the untransformed model cost can not be estimated. Give a warning instead and return NA for the t-test results. summary.mkinfit: Give a warning message when the covariance matrix can not be obtained. A test has been added to containing such an edge case to check that the warnings are correctly issued and the fit does not terminate.