Choosing the correct file format when saving your project in Grapher is essential for data management, sharing, and plot updating. Grapher uses three primary document file types, Grapher File (.GRF), Grapher Project (.GPJ), and Grapher Template (.GRT), each determined by how you want the plots to link to their data. The file type you select determines how your graph information (scaling, formatting, parameters) is stored and whether the data is linked externally, embedded internally, or replaced by placeholders.
Grapher Project (.GPJ): Storing Graph and Data in One File
The .GPJ format stores all information necessary to reproduce the graph, including the data, which is saved as embedded worksheets within the project file itself.
Data Handling: Stores the used data internally as embedded worksheets, making it a single, self-contained file.
Key Behavior: When opened the plots appear exactly as they were saved immediately, data changes in the original source file are not automatically reflected unless you use the Graph Tools | Worksheet | Reload command.
Sharing: You only need to send the .GPJ file.
When to Use .GPJ:
Most finished projects should be saved to this format.
Long term stability
GPJ files can be saved, moved, and restored without loss of data which makes them excellent for storing historic information over time.
Archiving and Portability
Best for finalized, static plots or when you need a single, portable file for easy transfer, ensuring the graph looks the same regardless of changes to the original data sources.
Use when you need to archive or preserve the exact state of the data used to generate a specific graph at a moment in time (e.g., for publication or audit).
Grapher Template (.GRT): Enforcing Style and Layout Consistency
The .GRT format is used to create a template with set graphing preferences, storing placeholder data instead of specific source data.
Data Handling: Does not contain specific data or a link. It uses placeholder data to define the layout.
Key Behavior: After opening the Grapher template you can load a data file. The new graph will adopt all saved template settings (formatting, labels, scaling, etc.) while updating axes to match the loaded data.
Sharing: You can share graph setting and layout in a .GRT file without exposing any proprietary data.
When to Use .GRT:
Consistency & Compliance: Use to quickly update graphs for long-term monitoring or regulatory reports with new datasets, ensuring a standard, compliant look every time with axes automatically updated to your new data range without compromising data security.
Team Knowledge Transfer:
Grapher power users can easily hand off polished templates to other team members, ensuring high-quality updates without extensive training.
Inherit a complex Grapher file from another user, convert it to a template and be able to update the file without being required to know all the settings that need to be updated.
Combatting Infrequent Use : Get a format set up once, and be back up and running faster months or years later, without having to remember every formatting detail.
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Golden Nugget : Pair Grapher Templates with the Comments feature to add notes to your template, ensuring that the next person to use the file knows exactly what to do and how to efficiently use your template. |
Grapher File (.GRF): Linking to External, Changing Data
The .GRF format stores all the information needed to reproduce the graph except the data. It saves a link to the external data file(s).
Data Handling: Does not store data internally, instead it links to external source data file(s).
Key Behavior: The data file is reloaded every time the GRF file is opened. If the source data file has changed, the plotted data will automatically update while the axes retain their settings.
Sharing: You must send the data file(s) separately along with the .GRF file.
When to Use .GRF:
Live/Periodic Data File Updates: Ideal for reports where the source data file is updated regularly, and you need the graph to always display the most current version of the data without changing any graph settings.
Data Size Management: When working with extremely large datasets that would make a single project file (.GPJ) too cumbersome or slow to manage.
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