The parameter iplot decides whether a graph will be created.
The filename can be specified with the calling option -p :
cora_fit -p plotfile .
The default filename cora.[ps,gif,ppm] is used, when no option -p is specified. The suffix depends on the selected format ( iformat=[1,2,3]); no file is created, of course, when iformat=0, i.e., X-Window is selected. When specifying a filename with -p, the suffix can be omitted. When not omitted, it should correspond to the suffix of the selected format, otherwise filenames like cora.gif.ps will result. The graph will contain the original spectrum, binned with nbin (bold line, histogram style), the fitted spectrum (continuous thin line for sum of lines, dotted line for individual lines), the total background (dashed line) and the instrumental background (line-dotted).
The wavelength range depends on the position of the lines, the line widths and the allowed ranges dlam and dsig. The appearance of the plot is determined by the input parameters ilog for logarithmic plotting (only y-axis), ierrplot for inclusion of error bars from the measured spectrum and ilab for putting labels into the plot quoting the fitted line parameters.