Evaluation of Graphics Packages for PCs

**Plotting Options**

Feature | Stanford Graphics | DeltaGraph | Origin | Sigmaplot |

Ignore missing observations | Yes | Yes | Yes | Yes |

Extrapolation | No | Yes | Yes | No |

Interpolation | ||||

Linear | Yes | Yes | Yes | Yes |

Spline | Yes | Yes | Yes | Yes |

Parametric | Yes | No | No | Yes |

Error Bars | ||||

From data | Yes | Yes | Yes | Yes |

Percent errors | No | Yes | Yes | No |

Plus/minus constant | No | Yes | No | No |

Standard error | Yes | Yes | No | Yes |

Standard deviation | Yes | Yes | Yes | Yes |

Positive, negative, or both | Yes | Yes | Yes | Yes |

Bidirectional error bars | Yes | Yes | Yes | Yes |

Asymmetrical error bars | Yes | Yes | Yes | Yes |

Curve Fitting | ||||

Linear | Yes | Yes | Yes | Yes |

Polynomial (2nd order or higher) | Yes | Yes | Yes | Yes |

Exponential | Yes | Yes | Yes | Yes |

Logarithmic | Yes | Yes | Yes | Yes |

Hyperbolic | Yes | Yes | Yes | Yes |

Total fit functions available | 7 | ~20 | claims 200 | > 100 |

User Defined Fits | No | Yes | Yes | Yes |

Plot directly mathematical functions | Yes | No | Yes | No |

Plot confidence intervals for mean y (or y) as 95% and 99% confidence lines | No | No | Yes | Yes |

Graph curve data to file | Yes | Indirectly | Yes | Yes |