Next, the data without semilog scale. 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. 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.
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. As indicated above, small variations of the plot near the 10 CPM area are visible, as well as larger variations near the 30,000 CPM area. Good for easy instant viewing of radiation with the potential for large swings. 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. To return to a previous page, use your browser's BACK button.