Histogram

Histograms are chart that make understand with a simple glance how data values of a singular dimension are distributed.

Visual SEO Studio uses them widely in its report to easily convey how a page places itself among the others when evaluated in terms of a dimension (e.g. title length, page size, number of images, etc.).

Example of histogram ("DOM elements", from the Performance Suggestions report)

When the specific report sets upper and/or lower thresholds for dimension examined, values bucketed over the maximum or below the minimum are drawn in red. Otherwise, they are drawn in green.

Items

The number of elements (typically pages) taken into account in the whole data set.

Mean

The mean value of the dimension taken into account.

Median

The median value of the dimension taken into account.

Graph

The actual histogram chart.
You can zoom it at pleasure, copy it or save it as an image file.

Right-clicking the mouse a context menu will appear:

Histogram context menu

Context menu command items are:

• Mode: Zoom
  Checked by default. When Zoom mode is selected, clicking and dragging on the chart area will select an area to zoom.
  You can combine Zoom and Move at pleasure.
• Mode: Move
  Mutually exclusive to the Zoom mode. When the Move mode is selected, clicking and dragging on the chart area will move the chart.
  You can combine Zoom and Move at pleasure.
• Copy chart
  Copies in the clipboard memory the chart as an image.
• Save image as...
  Saves the chart as an image file.
• Zoom in
  Zooms the chart in.
• Zoom out
  Zooms the chart out.
• Reset zoom
  Restores the original zoom and pan settings.