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Frequently Asked Questions (FAQ)

Usage

Formula Errors

Q: Why does my formula fail?

A: Check the following:

  • Use Mathematica-style function names with square brackets: Sin[x] (not sin(x))
  • Column names and constant names are spelled correctly
  • Use supported functions (e.g., Sin, Cos, Log, Exp, Sqrt, Abs)

Referencing Columns

Q: How do I reference columns in a formula?

A: You can use:

  • Header names from the first row (e.g., E1, E2)
  • Positional aliases x1, x2, x3, ...
  • In extrapolation mode, A, B, C for the first three columns

Uncertainty Format

Q: How do I represent uncertainties?

A: Two formats are supported:

  • Parentheses notation: 1.2345(67) means 1.2345 ± 0.0067
  • Separate columns: value and sigma in two columns

Log-Scale Fitting

Q: What are the constraints for log-scale fitting?

A:

  • log-x requires all x > 0
  • log-y requires all y > 0
  • log-xy requires all x, y > 0

Technical

LaTeX Compilation

Q: PDF generation fails — what should I do?

A:

  • Ensure LaTeX is installed (e.g., texlive or MacTeX)
  • Check the configured LaTeX engine path
  • Review error details in the logs

Performance

Q: Why is high-precision computation slow?

A: This is expected. Higher mp.dps means slower computation. Recommendations:

  • Use high precision only when needed
  • 80 digits is usually sufficient for acceleration methods
  • Use default precision for routine runs

File Upload

Q: Upload fails — what should I check?

A:

  • File must be UTF‑8 encoded
  • File size must be within the limit (default 1MB)
  • Format must be valid (headers on first row, data on following rows)

Troubleshooting

Unexpected Results

  1. Verify input format
  2. Validate formula syntax
  3. Check parameter settings
  4. Review warnings

Display Issues

  1. Clear browser cache
  2. Try another browser
  3. Check the JavaScript console for errors

Export Issues

CSV download:

  • Ensure results are generated
  • Check browser download settings

LaTeX/PDF:

  • Copy LaTeX and compile manually
  • Check your PDF viewer