Scatter Analysis

Use the Database Tools > Geostatistics Toolkit > Scatter Analysis or the Geochem Analysis > Scatter Analysis menu options, (CHSCAT GX), to select the channels to display and the symbols to use with the Scatter Plot Tool.

Select Scatter Plot Channels and Symbols dialog options

Templates and Overlays
Category	Select one of the defined categories, to locate a template of interest, or select All Items to see all of the available templates.
Template	Select a Template from the drop-down list. Once selected, the remaining fields are populated, based on the template settings. Click the Save button to save the current settings to a template. If the template already exists, it will be updated/overwritten with the current settings. Create a new template with the current settings by entering a new template name. The file will be saved in the "…//Oasis montaj/users/etc" folder. The Template file, which is a text file that contains information on the channels, scales, titles, etc., as well as the name of the associated overlay file.
Overlay	Select an Overlay from the drop-down list. The Overlay file is a text file that contains either (i) line/text commands to draw an overlay or (ii) the name of a map file to use as the overlay. In this case, it refers to a map file. Only overlays that match the current channel selection will appear in the overlay list.
Plot overlay	Check ( $image\checkbox.jpg$ ) the Plot Overlay box, to enable the Overlay parameter and to select an overlay file from the drop-down list to plot to a map.
Data
Horizontal	Specify the Horizontal channel (the channel plotted along the "X" axis). Check the Log ( $image\checkbox.jpg$ ) box to plot the Horizontal axis using the Log option. Click the Function ( $image\function.jpg$ ) button to display the Define expression for axis dialog. Use this dialog to define an expression, based on the database channels, to use to plot the channel axis.
Vertical	Specify the Vertical channel (the channel plotted along the "Y" axis). Check the Log ( $image\checkbox.jpg$ ) box to plot the Vertical axis using the Log option. Click the Function ( $image\function.jpg$ ) button to display the Define expression for axis dialog. Use this dialog to define an expression, based on the database channels, to use to plot the channel axis.
Mask
Mask channel	Specify the Mask Channel (may be "None").
Colour	To select the colour of the Mask channel, click in the colour box. The Colour tool will be displayed. If you select None for the colour, then no masked values will be plotted. Masked values are those with dummy "*" values in the mask channel.
Symbols
Fixed colour	Select the Fixed Colour radio button to enable the Colour box, to select a fixed colour for the scatter plot symbols. Click in the Colour box, and the Colour tool will be displayed.
Symbol size	Specify the Symbol Size (in mm) in the box provided.
Zone coloured symbols	Select the Zone Coloured Symbols radio button to enable the Zone parameters. Using the Zone Channel drop-down list, select a channel to use as a colour reference channel. This should be a channel with numeric values. The Define button will be enabled. Click this button to display the Define Colour Zones dialog, enabling you to define the colour zones. Using the Zone File browse button ( $image\browsefilebutton.jpg$ ) locate and select a colour zone file to use with the reference channel to colour the symbols.
String classified symbols	Select the String Classified Symbols radio button to enable the Classified parameters. Using the Class Channel drop-down list, select a channel to use as a classified colour reference channel. This will normally be a text (string-type) channel. Check ( $image\checkbox.jpg$ ) the Plot unclassified data? box to include all unclassified data in the Scatter Plot. Check ( $image\checkbox.jpg$ ) the Plot unassigned data? box to include all unassigned data in the Scatter Plot.

Application Notes

A Template is a predefined Scatter Plot diagram with set axes and graphical categorization elements. Each Template consists of three files:

The Template file, "*.geosoft_template", which is a text file that contains information on the channels, scales, titles, etc., as well as the name of the associated overlay file.
The Overlay file, "*.geosoft_overlay", which is a text file that contains either (i) line/text commands to draw an overlay or (ii) the name of a map file to use as the overlay. In this case, it refers to a map file.
The Map file, "*_Overlay.map", which is a Geosoft map containing the overlay map items.

These files are stored in the "…/Geosoft/resourcefiles/etc" folder. New or modified Templates and Overlays are stored in the "…/Geosoft/user/etc" folder.

Twenty-eight Bi-variate Diagram (Scatter Plot) Templates are included with montaj Geochemistry. They are divided into three categories: Lithological Discrimination, Diamond Exploration and Uncategorized.

For more information on the Scatter Plot Templates, see the About Scatter Plot Templates topic.