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Below is the same data plotted in semilog format, but without background subtraction.
Next, the data without semilog scale.
Aw-graph makes it very easy to subtract background from loaded plot(s). A menu selection prompts you for a background value. The prompt defaults to a value derived from the plot's autoscale Y-axis minimum value. Another menu selection restores background to the plot(s).
While displaying a plot, Aw-graph can flip between normal plot and semilog plot with the hit of a key. If activated, Aw-graph's regression and interpolation functions act on the normal data or the semilog data as it flips between the two.
Other useful features: You can use Aw-graph's Zoom feature to zoom in on any part of a plot then flip between semilog or normal scaling.
After subtracting background and applying semilog scaling, you can enter auto-refresh mode wherein Aw-graph will update the plot(s) as more data is added to the radiation file (or any file holding the data) and will automatically subtract the background and apply the semilog function to the new data.
Semilog mode is excellent for displaying plots that contain both higher values and lower values. One can see the higher values change near the top of the graph, yet see small changes near the bottom.
Same data without semilog plot.
The background subtraction and semilog features act upon data in memory and do not change the data on disk, so one can experiment with the data freely. You can export the data in memory (with semilog and background subtraction applied) to an ASCII file.
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