RockWorks | Utilities | Statistics | Histogram | Single
This program is used to read a single column of data from the datasheet and determine the frequency or percentage of the total number of measurements for that variable that falls in each user-defined grouping or "cell." These values are represented as a bar histogram plot.
Menu Options
Step-by-Step Summary
Menu Options
- Data Column: Click in the drop-down list in the left pane of the window to select the column in the datasheet containing the data that you wish to process.
- Titles: Enter the primary and secondary titles, if any. (More.)
- Scaling + Bin Size: Expand this to designate the width of each histogram bin as they will be displayed on the histogram plot, and to determine whether the bins are to be displayed at a linear or logarithmic scale. Choose Linear or Logarithmic scaling. The scaling scheme you select will determine your options for selecting the bar widths. Expand the selected item for further options. (More.)
- Bin Colors: Expand this item to select how the histogram bars are to be filled. (More.)
- Filtering: Insert a check to activate a filter for the values, and expand the item to set the filtering parameters.
- Minimum Value: Click to enter the minimum value to be included in the histogram.
- Maximum Value: Click to type in the maximum value to be included in the histogram.
- Plot Statistics: Insert a check here to include labels that represent the groupings of histogram bars into mean + and - 1SD, 2SD, 3SD and 4SD. Expand this item to establish the label color and size (as a percent of diagram width.). (More.)
- Plot X Axis Labels: Insert a check here to plot labels along the bottom axis that represent the real number units of the variable being plotted. Expand this item to establish the label color and size (as percent diagram width).
- Plot Y Axis Labels: Insert a check in this box to plot labels along the vertical axis that represent the frequency units. Expand this item to establish the color, size and units.
- Plot as Percentages: Insert a check in this check-box if you want the units to represent percent. If this box is cleared, the units will represent actual occurrences.
- Statistical Legend: Insert a check here to include a legend listing a statistical summary for the data.
Expand this heading to access the legend layout options. (More.)
- Fixed Diagram Width:Height Ratio: Check this box if you wish to define a specific size ratio for the graph, excluding the legend (default 2.0 which representes twice as wide as high).
Step-by-Step Summary
- Access the RockWorks Utilities program tab.
- Enter/open/import your data to be analyzed into the datasheet. See Entering Your Data for information.
- Select the Statistics | Histogram | Single menu option.
- In the displayed dialog box enter the requested information, discussed above.
- Click the Process button to continue.
The program will read the real number values from the requested datasheet column, and filter any low or high values if requested. It will display the data range in a window, if Confirm Range is activated.
- You can override the minimum and/or maximum entries to extend the range of the axis. For example, if the data range as displayed in the window is 21 - 74, then that would be the range of the horizontal axis if left unchanged. If overridden to 0 - 100, then the axis itself would extend from 0 to 100 units.
- Click OK to continue.
The program will then determine the number of remaining samples that fall into each of the histogram "bins," counting them either as actual frequencies or as percent. The completed histogram plot will be displayed in a RockPlot2D tab in the Options window.
- You can adjust any of the diagram option in the pane to the left (adjust color scheme, change scaling, etc.) and then click the Process button again to regenerate the histogram.
! Each time you click the Process button, the existing display will be replaced.
- View / save / manipulate / print / export the diagram in the RockPlot2D window.
Back to Statistics Menu Summary
RockWare home page