Loading and saving peak tables

Loading the peak table file

To load a pre-existing table of peak positions/heights/widths/etc. from a peak table file, select the ‘Peak fitting→Load peak table’ menu option. This will open a file opening window, in which you may select the peak table file to open. Peak table files are stored as comma separated text files, with a file extension of ‘.csv’.

Saving the peak table file

To save the current peak table as a file, select the ‘Peak fitting→Save peak table’ menu option. This will open a file saving window, in which you may select the name of the peak table file to be saved. The peak table is saved as a comma separated text file, with a file extension of ‘.csv’. These files may be opened in popular spreadsheet programs such as Microsoft Excel.

Peak table file format

The peak table is stored as a comma separated value text file (.csv), which – aside from a small file header – is a direct copy of the values in the Peak table window. The current peak table file format looks like:

xutil_SpecViewFit peak table
FileVersion:,1
x-axis:,eV
nPeaks:,3
Name,Pos,Fit,Height,Fit,FWHM,Fit,G/L,Fit,Colour
,3.03977,1,89.894,1,0.707087,1,1,1,5050DC
,2.38978,1,61.5315,1,0.759407,1,1,1,50DC50
,3.62354,1,15.8166,1,0.276534,1,1,1,DC5050

Please note that:

• The format of the peak table file may be subject to change at any time. If changes are made to the file format, the value of the ‘FileVersion’ field will be incremented. Software that reads OpticalFit peak tables should check the value of the ‘FileVersion’ field, and reject files with values greater than supported version at the time of writing.
• The header explicitly declares the x-axis units using the ‘x-axis’ field, which is required to interpret the position and FWHM fields.
• The ‘Name’ field will usually empty for each peak in the peak table, unless the user has explicitly set names for the peaks. If a peak has a zero-length name, OpticalFit will automatically generate a name for display purposes using the peak's position.
• The ‘Fit’ fields are stored as 0 (for fitting disabled) or 1 (for fitting enabled). There is not ‘Fit all’ field, as this is determined from all the ‘fit’ fields for each peak.
• The peak colour is stored as six hexadecimal characters, representing three bytes for the red, green and blue components (each 00→FF).

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