| Initial Values for the Fit Parameters | Plot Description |
The file should contain a table with the measured data. The table consists of several columns, some of which are used for the fit. The numbers of the columns, to be used for the fit, should be given in the format field, separated by colons. The default format 1:5:6 means that the first column contains the frequencies, the fifth one contains the amplitudes and the sixth one contains the errors of the amplitude. Here is an example file: parta_testdata.txt with pseudodata.
The numerical results are both shown on this Web page and plotted in an EPS file. You can save the file, print and attach it to your report.
Your data are fitted on the Webserver using the free Linux GNUPlot program. If you have some Linux and programming experience, you can download the GNUPlot macro fitlorentz.gplt for the fits. You can edit the macro file using your favorite text editor (nedit, xemacs, ...). The usage is explained in comments in the file.
