External Data

The free unlicensed version of DataView has Histogram and 3-D Scattergraph facilities that can be used with data generated externally to DataView.

Histogram

The histogram can receive raw data values in column text format (one value per row). It can load them from a file, either explicitly or by drag-and-drop from File Explorer, or paste them from the clipboard.

• X axis scales can be set automatically from the data, or by the user.
• Bin number can be set by the user, or optimized with a Bayesian algorithm.
• Bin height can be scaled to show raw counts, percentage, density, log counts, or square root of counts

The histogram has the following analysis facilities:

• Construct a probability density function (PDF) graph from data values modelled as a mixture of up to 4 distributions with Gaussian, exponential, gamma or Poisson forms.
• Construct a kernel density estimate (KDE) graph with Gaussian, Epanechnikov or box kernels, and bandwidth either specified by the user or estimated from the data.
• Construct a circular (rose) plot of wrap-around data such as phase, time-of-day (24 hour clock), or angle. The plot reports circular statistics (Zar, 2010).

3-D Scatter Graph

The scatter graph can receive n-dimensional raw data values in tab-separated column text format. It can load them from a file, either explicitly or by drag-and-drop from File Explorer, or paste them from the clipboard.

The graph can:

• Display any 3 selected dimensions of data in a rotatable 3-D format.
• Edit rows and columns of data.
• Cluster the data, using either all the data available, or just the 3 dimensions shown in the plot, and colour each point according to its assigned cluster.
• Label each row of data according to the cluster to which it is assigned.
• Export edited/clustered data in text format.