Histogram

The Histogram tool is used to plot a histogram of the voxel values in a loaded data set.

Getting There

The Histogram tool may be reached via the Tools Menu or by using the keyboard shortcut "Ctrl+Shift+H". See VQ Keyboard Shortcuts for a complete list.

Function

The Histogram Tool is operated via two control panels: Data Controls and File Controls.

Data Controls

Option Description
Data Set This pulldown menu allows the selection of the data set to be histogrammed.
No. bins Sets the number of bins into which to divide the data.
Min Sets the minimum value for which data will be displayed. The Set button, , automatically loads this field with the minimum value in the object.
Max Sets the maximum value for which data will be displayed. The Set button, , automatically loads this field with the maximum value in the object.

File Controls

Option Description
Saves the existing plot into a PDF file.
Writes the data into a text file. The format is in two columns with the first column representing bin center points (x-axis values) and the second column representing the number of voxels in each bin (y-axis values).
Refreshes the histogram plot. Use this button after changing the No. bins, Min., or Max. values.
Exits the Histogram Tool.