How to Use GetData Graph Digitizer 2.26 to Extract Data from Graphs
How to Use GetData Graph Digitizer 2.26 to Extract Data from Graphs
GetData Graph Digitizer 2.26 is a software that allows you to extract raw data from visual graphs for analytical purposes. It can be useful when you need to get the original data (x, y) from a digitized scientific chart, when data values are not available. In this article, I will show you how to use this software to scan graphs and export data to different formats.
Step 1: Download and install GetData Graph Digitizer 2.26
You can download the software from its official website[^1^] or from other sources[^2^] [^3^] [^4^]. The software is compatible with Windows XP, Windows 7, Windows 8, and Windows 10. The installation process is simple and straightforward. Just follow the instructions on the screen and accept the license agreement.
Step 2: Open a graph and set the scale
After launching the software, you can open a graph by clicking on the File menu and selecting Open Image. You can also drag and drop an image file into the main window. The software supports TIFF, JPEG, BMP, and PCX image formats.
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Once you have opened a graph, you need to set the scale by defining the coordinate system. You can do this by clicking on the Axes menu and selecting Set Scale. A dialog box will appear where you can enter the coordinates of two points on each axis. You can also choose the type of axis (linear or logarithmic) and the units of measurement.
Step 3: Digitize the graph
After setting the scale, you can start digitizing the graph by clicking on the Digitize menu and selecting one of the three methods: Auto Trace, Manual Trace, or Manual Point Selection.
Auto Trace is an automatic method that scans the graph and detects the data points based on color contrast. You can adjust the sensitivity and smoothness of the scanning algorithm by using the sliders on the toolbar. You can also pause, resume, or stop the scanning process by clicking on the buttons on the toolbar.
Manual Trace is a semi-automatic method that allows you to trace the curve by moving your mouse along it. The software will record the data points as you move your mouse. You can also use keyboard shortcuts to zoom in or out, undo or redo, or switch between curves.
Manual Point Selection is a manual method that allows you to select individual data points by clicking on them with your mouse. You can also use keyboard shortcuts to zoom in or out, undo or redo, or switch between curves.
Step 4: Export or copy data
After digitizing the graph, you can export or copy the data by clicking on the File menu and selecting one of the options: Export Data, Copy Data to Clipboard, Save Workspace, or Print Data.
Export Data allows you to save the data as a text file (TXT), an Excel file (XLS), an XML file (XML), an AutoCAD file (DXF), or a PostScript file (EPS). You can also choose the delimiter, decimal separator, and number format for your data.
Copy Data to Clipboard allows you to copy the data to your clipboard so that you can paste it into another application.
Save Workspace allows you to save your work as a project file (GDD) so that you can resume it later.
Print Data allows you to print your data as a table or a graph.
Conclusion
GetData Graph Digitizer 2.26 is a handy tool for extracting raw data from visual graphs for analytical purposes. It has a user-friendly interface and supports various image formats and export options. It also has two automatic scanning algorithms and an easy-to-use manual method for digitizing graphs. You can download it from its official website[^1^] or from other sources[^2^] [^3^] [^4^]. 29c81ba772
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