Histogram Plot

To create a Histogram Plot using the results of a Probabilistic Analysis:

1. Select Statistics > Histogram Plot
2. In the Histogram Plot dialog:
   • Select the Data to Plot. The following data can be plotted:
     • The Factor of Safety, Weight, Required Support Pressure, or Failure Depth, for any analysis method which was used (these will be listed first before the input data Random Variables).
     • Any Random Variable that you have defined for the Probabilistic Analysis (these will appear after the pre-defined data types in the drop-down list of Data to Plot).
3. The Number of Bins used to create the histogram can be customized if desired.
4. Select Blocks to Plot. The following blocks selection options are available:
   • Current Result Set: the blocks included in the active Results Set (i.e., All Valid Blocks, Removable Blocks, Failed Blocks)
   • Filtered Blocks: the blocks included in the current filter
   • Single Block: a single block given by the Block ID
5. You can also highlight data on the plot, according to user-defined criteria, by selecting the Highlight Data checkbox, and defining your criteria. See below for details.
6. Select the Best Fit Distribution checkbox to plot the best fit curve on top of the histogram according to one of distributions.
   
7. Select the Relative Frequency checkbox to get the relative frequency of the histogram.
8. Select the Plot button to generate the histogram plot.

Highlight Data

To highlight any subset of data on the histogram:

1. Select the Highlight Data checkbox in the Histogram Plot dialog.
2. Select a Random Variable.
3. Select an operator (< , <= , > , >= , Range).
4. Enter the numerical value(s) defining the data you would like to see highlighted.
5. When you select the Plot button, data which fits your selection criteria will be highlighted on the histogram in a different colour with a legend. The highlight criterion will be listed at the top of the histogram.

Example

Plot a Histogram of an input Random Variable (e.g., a Material Property), and then define a Highlight Data criterion of Factor of Safety < 1. This will show the distribution of failed analyses, relative to the overall distribution of the Material Property.

Histogram – Input Data Random Variables

If you are plotting a Histogram of one of your input data Random Variables, then the following information will be displayed on the plot.

• SAMPLED: the calculated statistics of the raw data which was generated by the statistical sampling (Monte Carlo or Latin Hypercube) of your input data distribution.
• INPUT: the user-defined input parameters of the distribution, that you defined for the Random Variable in the Slide Model program. In general, the parameters of the input distribution (mean, standard deviation, minimum and maximum), will NOT be exactly equal to the parameters calculated for the raw (sampled) data.

Histogram – Calculated Results

If you are plotting a Histogram of Factor of Safety, Weight, Required Support Pressure, Failure Depth, or Slope Face Area, then the following information will be displayed on the plot.

• SAMPLED: the calculated statistics of the raw computed data generated by the Probabilistic Analysis.
• FIT: the statistics of the BEST FIT distribution, to the raw data. The type of distribution, and the parameters of the distribution, which best fits the actual distribution of the raw computed data, is listed. In most cases, the statistics of the FIT distribution will be identical to the statistics of the raw data.

Right-Click Options

Many different options are available if you right-click on a Histogram. For example:

• Select the Change Plot Data option, and the Histogram Plot dialog will appear, allowing you to change the data viewed on the plot.
• Select Relative Frequency to toggle the display of the Frequency axis to use relative frequency (i.e., frequency axis is scaled such that the area under the distribution is equal to 1) or actual frequency.
  
• Select Best Fit Distribution to toggle the display of the best fit distribution to the histogram data (only applicable for data types which are computed)
• Select Highlight Data Only to see only the highlighted data on the graph.
• Select Input Distribution to toggle the display of the actual distribution that you defined for the Random Variable (only applicable for input data Random Variables)
  
• Plot in Excel: you can either right-click a chart or click the Plot in Excel button in the toolbar. An Excel application will open and the data will be exported in columns. A chart object duplicating what was in the RocSlope3 will also appear.
• Copy Chart Image: this allows you to copy and paste the chart as an image.
  
• Copy Data to Clipboard: this allows you to copy and paste the data to another spreadsheet or word file.

Experiment with the different options available in the right-click menu.

Chart Options

The Chart Options pane on the left side allows you to modify the graph with the drawing/settings of the plot. The drawing section allows you to change the labels while settings allow you to adjust the graph settings such as axis alignment, min/max, etc.