GC Image GCxGC-HRMS Edition Users' Guide
New Features and Improvements in Release 2.3
GC Image GCxGC-HRMS Edition Release 2.3 (August 2012) has many new features and improvements.
See the GC Image GCxGC-HRMS Edition Users' Guide for full documentation.
GC Image GCxGC-HRMS Edition Release 2.3 requires Microsoft Windows XP Service Pack 3 or later operating system.
Spectral Background Subtraction
GC Image GCxGC-HRMS Edition R2.3 introduces new tools for
subtracting a background spectrum from a chromatogram. This release supports:
- Subtraction of a spectrum from the entire chromatogram or within selected graphical regions.
- Optional normalization of the subtracted spectrum based on its base peak, its ten largest peaks, all its peaks, or its peaks in user-defined spectral range(s).
- Specifying a spectral tolerance to operate on peaks with sub-integer mass precision for subtraction (available in HRMS Edition software only).
Improved Blob Table and Blob Set Table
GC Image GCxGC-HRMS Edition R2.3 updates the Blob Table and Blob Set Table with new features and configuration options.
- The Blob Set Table now supports aggregated values for all computed attributes of blobs except for CLIC columns.
- Users can configure how to compute aggregated values in the Blob Set Table with common aggregators including min, max, sum, and average.
- Users can configure the Blob Set Table to show multiple aggregated values for a single computed attribute.
- Users can configure column order directly on the Blob Table and Blob Set Table by drag-and-drop.
GC Image GCxGC-HRMS Edition R2.3 significantly expands the functions and flexibility of
This release also updates the CLIC Expression tool with a new interface and expanded functionality.
- CLIC supports a new function, FeatureAtBlob(), that allows access to computed attributes of other blobs.
- The CLIC Expression tool supports exporting and importing expressions.
- The CLIC Expression tool displays the most recently used functions for convenient access.
- The CLIC Expression tool displays the description of a function upon selection.
Image Investigator™ with Multi-Class Analysis and Visual Feature Selection
GC Image GCxGC-HRMS Edition R2.3 adds new support for multi-class analysis and feature selection to Image Investigator.
This release supports:
- Principal component analysis (PCA) with any attribute for unsupervised class analysis.
- Reporting pairwise differences, pairwise Fisher ratios, and one-vs-all Fisher ratios of all attributes
for supervised multi-class analysis.
- Interactive line, scatter, bubble, and principal component plots for examining and selecting features.
- Filtering features based on computed statistics in tables and plots.
- Saving plots and tables to XML, CSV, and XLS files for reporting or external analysis.
In addition, Image Investigator supports:
- Options for relaxing the constraints for reliable peaks in automated feature template generation.
- Remembering paths and user preferences across sessions.
Automated Processing with Methods
GC Image GCxGC-HRMS Edition R2.3 adds more fully featured support for automated data processing methods.
In addition to support for exporting a method from a processed image, this release supports:
- Building a method with processing steps in a custom order.
- Allowing a method to have parameters specified at runtime for more flexibility.
- Running a method on any processed or unprocessed image.
- Exporting, importing, and managing multiple methods.
Batch Processing with Workflows
GC Image GCxGC-HRMS Edition R2.3 introduces support for workflows in GC Project. In addition to the New Project Wizard,
this release supports:
- Three additional built-in workflows for common tasks including processing with a sequence table, existing runs, and existing images.
- Recording a custom workflow based on built-in workflows.
- Running a workflow on an existing project at any time.
- Exporting, importing, managing, and editing multiple workflows.
New and Improved Operations and I/O Support
GC Image GCxGC-HRMS Edition R2.3 has new and improved I/O facilities and other improvements, including:
GC Image™ GCxGC-HRMS Edition Users' Guide © 2001–2012
by GC Image, LLC, and the University of Nebraska.