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Albert Phelps
One of the reasons for this wish is that it would make it much easier to figure out which criteria to use to define the various regions, since within iogas one can plot all of the data on any number of X-Y or triangle graphs and assign colour-coding, or shapes, or sizes to selected data points, and have those colours apply to the same points on every other graph so that one can see at a glance which is which.
Therefore I could generate the images, export to iogas, define the regions there, and then use those values to return to iogas and define corresponding regions there, which could then be exported from the Imaging data table tab and appended to the original iogas file for the sample to confirm that the composition of the region is compatible with the range of compositions of the various data points contained within the region.
These, together with a range of additional updates and features, make REFLEX ioGAS 6 the most comprehensive and efficient solution for geochemical and geometallurgical data analysis available today.To find out more about REFLEX ioGAS 6, please click here or email: io...@imdexlimited.com
3 Scatterplot Matrix (SPLOM) Point Density Gridding and Mineral Nodes Calculations Menu Multivariate Analysis Tools Generate Classification Diagrams Copy, Save and Print Options Save Checkpoint Save iogas File Save As iogas File Copy Window as Image Copy Graph as Image or Vector File Save Graph as Vector File Print Graph Export and GIS Options Export Data Export to Google Earth Export to ArcGIS Export to MapInfo iogas Link for GOCAD iogas Link for Leapfrog Geo Help System Training Videos Frequently Asked Questions Technical Support Page 3 of 48
4 Quick Start Tutorial Overview An iogas evaluation licence is valid for two weeks* and the software is fully functional during this time. After this time the software can only be used with a valid licence file. To learn how the iogas program works we recommend viewing the Getting Started With iogas video. This is a detailed video that covers many of the features of iogas and how they work. Use the steps in this tutorial to follow a typical workflow to get you up and running and using various features of the iogas software. The tutorial uses an excel version of the iogas demonstration dataset. For our maintained users there are a number of additional training videos available from the Help>Training Videos menu. Contact io...@imdexlimited.com to purchase iogas or for any other enquiries. * The two week trial period is not available for MAC installations. If you are running a MAC computer please install iogas and then start the program. Click on the Send Machine ID button in the displayed message and copy/paste the Machine ID number into an and send to iogas....@imdexlimited.com to obtain an evaluation licence file. Page 4 of 48
5 1. Import Data iogas can support the following file types: Open Excel File iogas files (.gas files) Tab-delimited text files (.txt files) Comma-delimited text files (.csv files) Excel Spreadsheet files - all (.xls,.xlsx files) XRF Files - Olympus Innov-X (.dbf,.csv files), Niton (.ntg files) MapInfo GIS files (.tab files) Geography Markup Language files (.gml,.xml files) Data from external databases - see File>Open Database menu option: ODBC Database (Access, SQL, etc) REFLEX HUB Data ALS Webtrieve 1. Select File>Open. or click on the Open File icon on the Main Toolbar. 2. Browse to one of the following locations depending on what operating system is installed: PC users (32-bit OS): C:\Program Files\ioAnalytics\ioGAS\demo data folder PC users (64-bit OS): C:\Program Files\ioAnalytics\ioGAS-64\demodata folder (or C:\Program Files (x86)\ioanalytics\iogas\demodata folder if 32-bit version of iogas is installed) MAC users: iogas Application\Contents\Resources\app\demodata folder 3. Use the drop-down arrow next to Files of type: and select Excel Spreadsheet files - all (.xls,.xlsx files). Highlight the Demo.xlsx file and click on the Open File button. Page 5 of 48
7 2. Define Column Types Generally when a dataset is first imported into iogas the Column Properties dialog is displayed. This is where columns in the dataset are matched to columns required by iogas in order for data to be plotted successfully. Column Properties dialog showing assigned special columns Special Columns This section is where the sample number and coordinate columns in the dataset are selected so they can used to display data in the plot windows. ID - Unique sample identifier. East/North - X and Y coordinate columns. Used to display data in all spatial map views. Generally these will be in a projected coordinate system such as UTM coordinates. Page 7 of 48
8 East/North Projection - Coordinate system used for East/North columns above. This is the projection that is used in the geographical file exports, eg. gridded images as GeoTiff Images or ER Mapper grids, ArcGIS and MapInfo exports Elevation - Z value column. Required to display data in 3D spatial Plots. WGS84 Longitude/Latitude (decimal degrees) - Separate X and Y lat/long coordinate columns in WGS84 decimal degrees required in order to export data to Google Earth. 1. Match the columns in the demo dataset to the following Special Columns in iogas: ID = Sample Num East = East_AMG84_z51 North = North_AMG84_z51 East/North projection = AMG (AGD84) Zone 51 WGS84 Longitude (decimal degrees) = Long_WGS84 WGS84 latitude (decimal degrees) = Lat_WGS84 Column Name and Type Underneath in the Column Name and Type area iogas automatically assigns each column in the dataset as either Numeric, Text or Non-Plot. Sample ID and coordinate columns listed above are assigned as Non-Plot, ie. not variable columns. Variable columns are assigned as numeric or text. Analysis data to be used in plots is generally numeric whereas text data is used to 'group' data, for example Regolith Unit, Geology, Sample Medium, etc. If a column is imported as a text field yet contains numeric data then the column can be re-assigned as a numeric column and vice versa. 2. Scroll down and have a look at the different column types assigned to this dataset Non-Plot columns have a grey circle next to them while text columns have a black circle. Numeric columns can have either a blue circle or a green circle next to them depending on whether they are "aliased" or not. See Step 4 for more information on aliasing variables. Red circles denote that there is a problem such as duplicate column names and will need to be fixed before exiting this dialog. iogas lists the number of samples in each column that are numeric, text or null (blank) on the righthand side of the dialog. There are 999 records in the demo dataset. 3. Place the cursor over the original column name (without mouse clicking) to view tooltip information about the data in the selected column. Text columns display the individual categories and numeric columns display min, median and max values. If the tooltips do not appear click within the window to make it active and try again. Page 8 of 48
9 Note that it is still possible to plot data and use many of the functions within iogas without having an ID column selected. This is true for spatial fields as well and it is possible to set any of these at any time. 4. It is also possible to remove any columns before import by clicking on the cross next to the column to delete. These columns will be permanently removed from the imported dataset when the OK button is selected. See Column Properties in the Help>Help menu for more information. Page 9 of 48
10 3. Set Column Alias Names One very important feature of iogas is that if the element and the units that the values are captured in is known for each column, iogas can perform unit or element/oxide conversions on-the-fly in order to use the data with the classification diagrams, calculations and spider plot normalisations shipped with the program if the data is not already in the required format. Column Properties dialog showing list of element/unit combinations to select for column aliasing The way to "alias" columns is to select a standard geochemical element/unit combination from the Alias pull-down list next to each variable. When a column is "aliased" the circle next to this column is then coloured green, (indicating that it is a numeric column that is aliased) rather than blue (numeric) or black (text) as shown in the screen capture above. Observe the original names in the demonstration dataset compared with their "aliased" names that include what units they are captured in. If iogas can already guess the "aliased" name from the original Page 10 of 48
11 column name it will attempt to automatically assign an "aliased" name when the file is imported. Eg. Au_ppb Note: In iogas all variables can be renamed as desired and the new name will be shown everywhere in the program. To enter a new name for a column simply overwrite the one displayed in the Alias column for that variable. Alias Columns Use the following steps to "alias" the columns in the demonstration dataset to standard element/unit names: 1. Click on the Guess Aliases button. iogas will automatically guess the element and unit from the original column name for all columns. To alias a single column at a time use the Guess Alias button next to each variable. 2. It is important to check the data to make sure that the correct element/oxide/unit combination name has been applied. To manually assign an alias name to a column select the appropriate element/oxide/unit combination from the Alias pull-down list. To reset a single column back to the original name click on the Reset Alias using the Reset Aliases button next to each column or reset them all button. 3. When you are satisfied that the columns have been "aliased" correctly click OK to proceed. The Column Properties settings are retained when the file is saved in iogas format and can be modified at any time by clicking on the closed when you do this. icon on the Main Toolbar. Note that all open plot windows will be See Alias Columns for more information. Page 11 of 48
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