Navigation:  How do I ...? > Scaling > How do I create a grain size distribution plot?

A grain size distribution plot is an XY plot with, typically, a reversed logarithmic scale on the X axis showing grain sizes and a linear percent finer scale on the Y axis. In addition, DPlot shows material classifications below the X axis and sieve sizes above the graph. An example of this type of plot is shown in example plot ex07.grf:

Example:

Select the data below, right-click and select Copy, then Paste into DPlot.

You will initially see a normal linear X, linear Y line graph:

Right-click within the box surrounding the plot and select "Grain Size Distribution":

Alternatively, select Linear/Log Scaling>Grain Size Distribution on the Options menu. In either case this action will result in a grain size distribution plot with default settings:

To change type-specific settings right-click within the plot again and select Grain Size Options. Each of the options are thoroughly described in the Grain Size Options topic. There you can choose to display Udden-Wentworth scale material classifications rather than the default AASHTO-standard sizes:

and/or British standard sieve sizes at the top of the plot instead of the default US standards:

 

 

You can also elect to display a custom list of sieve sizes at the top of the plot, or to draw bold vertical lines across the plot at material boundaries.

 

 

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