List of Parser Features

The equation parser used for these Java applets is a very robust recursive descent equation parser. It has complete error handling and is very difficult to crash. Here is a list of features and supported operations:

• Full understanding of standard order-of-operations
• Supports exponentiation using the '^' symbol
• Implicit multiplication between a variable and a number and between parenthesised tokens
• List of supported operations:
  • +,-,*,/,^
  • sin(x), cos(x), tan(x), acos(x), asin(x), atan(x)
    - Assumes x is in radians
  • abs(x) - Returns the absolute value of x
  • exp(x) - Returns e^x
  • ln(x) - Returns the natural logarithm of x
  • sqrt(x) - Returns the square root of x
  • he(x) - Returns 0 if x<0 and 1 if x>=0

If you have any questions, or think of a function that should be added to the parser, please contact the author, Richard Williamson.

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Last modified: Thu Jun 10 8:29:03 1999