From help-octave-request at bevo dot che dot wisc dot edu Fri Nov 21 04:41:40 1997 Subject: Tolerance From: 60eem023 <60eem023 at keyaki dot cc dot u-tokai dot ac dot jp> To: help-octave at che dot utexas dot edu Date: Fri, 21 Nov 1997 19:41:25 +0900 (JST) Dear Sirs: Receutly, we had an opportunity of using one of your build-in functions, "lsode", for solving ordinary differential equation. However, we found that, for initial values of variable x's smaller than approximately 1.0e-8, the computational results are not reliable. We speculated that this is related to the setting of the tolerance value for the variables. According to your Octave manual, we quessed, the alteration of the tolerance could be made by using the command "lsode_options" or something like that. So that we tried to input the command such as "lsode_options(absolute tolerance, 1.0e-15)". However, this command did'nt work. Accordingly, we are very much obliged if you could inform us how to correctly input the command for the alteration of the tolerance. Thank you very much. Sincerely yours. /* Tokai University in Japn */ /* name: Makoto.Doi */ /* mail: 60eem023 at keyaki dot cc dot u-tokai dot ac dot jp */