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Evaluation of Graphics Packages for PCs
Data Handling
| Feature | Stanford Graphics | DeltaGraph | Origin | Sigmaplot |
| Data Files (import/export) | ||||
| ASCII (space-delimited) | Yes | Yes | Yes | Yes |
| ASCII (comma-delimited) | Yes | Yes | Yes | Yes |
| ASCII (tab-delimited) | Yes | Yes | Yes | Yes |
| DIF (Lotus) | Yes | Yes | Yes | Yes |
| SYLK | No | Yes | No | No |
| WK1 (Lotus 1-2-3) | Yes | Yes | Yes | Yes |
| DBF (dBase) | No | Yes | Yes | Yes |
| XLS (Excel) | Yes | Yes | Yes | Yes |
| WKQ (Quattro) | No | Yes | No | Yes |
| Keyboard data entry | Yes | Yes | Yes | Yes |
| Workstation maximums | ||||
| Total data points | Unlimited | 256*32K | Unlimited | Unlimited |
| Total data series | Unlimited | 256 | 425 | 16,000 |
| Floating point precision | ||||
| Number of significant digits | 13 | 15 | 16 | 14 |
| User-selectable | Yes | Yes | Yes | Yes |
| Co-ordinates system | ||||
| Rectangular (cartesian) | Yes | Yes | Yes | Yes |
| Cylindrical | Yes | No | No | No |
| Spherical | Yes | No | No | No |
| Editing data and data interpretation | ||||
| Selects non-contiguous data | No | Yes | Yes | Yes |
| Live link to worksheet file | Yes | No | No | No |
| Link to Excel worksheet | Yes | Yes | Yes | Yes |
| OLE Export facilities | Yes | Yes | Yes | Yes |
| Automatic update of graph if worksheet data changed | Yes | No | Yes | Yes |