Formula plotting-special symbols

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Click here for examples to see how special symbols are used. Examples are accompanied by source code and are rather self explanatory.

  • Sums are entered using a "sum" function
 sum( from, to, expression )   <-- sum with limits
 sum( expression )             <-- sum without limits


 e=sum( i=0, N, 1/i! )
 sum( 1/i ) = infinity
  • Integrals are similar to sums and are entered using the 'int' symbol
 int( expression, dx, from, to )   <- integral with limits
 int( expression, dx )             <- integral without limits (undetermined)


 int( 1/x^2, dx, 1, infinity )
 int( e^(x^2/2), dx )
  • greek letters are entered using their common English names. Lowercase names mean lowercase greek letters, uppercase names mean uppercase greek letters. Example: epsilon, EPSILON, pi, PI. See examples link in the first paragraph.
  • logarithms are entered using either base and power, or just power; Examples:
 log( 2, 8 ) = 3
 log( xy ) = log( x ) + log( y )