Variance of residuals (reduced chisquare) = WSSR/ndf : 0.000727299įinal set of parameters Asymptotic Standard ErrorĬorrelation matrix of the fit parameters: Rms of residuals (FIT_STDFIT) = sqrt(WSSR/ndf) : 0.0269685 change during last iteration : -1.80068e-09 This will be addressed in the following sections. All of these programs can produce publication-quality plots through a series of adjustments to their appearance. We will default all of the settings that control the appearance of the graphs, for simplicity. To demonstrate the plots within this notebook, we need to communicate to the external program, like physica, or load on-the-fly a kernel magic that will enable execution of an external program directly embedded in this python-based notebook. It's a limitation of jupyter notebook, and not of physica. A workaround is to use an external file, as will be shown below. Note that currently we cannot use these commands directly inside the jupyter notebook. The former has the advantage of portability (one file to keep track of for any project), the latter has the advantage of compactness (a small script acting on a series of potentially large data files).Īll three programs allow direct entry of data, with minor syntactic differences: The two basic ways are: direct entry, where you embed the data in the script, and external file read. These are reasonable alternatives so if you have significant skills in their scripting, they will be appropriate to continue to use, though they do not satisfy all of the selection criteria. To get a true feel for the programs, please attempt to use their native interfaces, guided by the sample command selections below.įrom a wide field of significant competitors not included here are Maple (a commercial package) and grace (a.k.a xmgrace), and Mac-world's Igor. In this notebook, we will emulate that behaviour by using scripts, which is actually an advanced use mode for most programs. All of these are inherently interactive programs, and so they are normally used through a command-line interface (CLI) or their own native Graphics User Interface (GUI). extrema), gnuplot, and octave (a free alternative to Matlab).
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