This applet allows a person to test several numerical
integration approximation methods by having the user fill out
the left and right endpoint fields, type in the formula, select
the method, and pressing the calculate button. For example try
typing in -1 for the left endpoint, 1 for the right endpoint,
and y=x^2 for the formula then press calculate. For each method
selected, the estimated integral for that method will appear in
the text area at the bottom. Certain functions will also appear
on the graph on the left. The java graph class is still
experimental and does not use equal stretch principles. y = x2
from -1 to 1 will appear the same as y = x2 from -100 to 100.
NOTE: Equations should be entered in the form of y=3x^2-2. Due
to the string parsing code in java decimal numbers, fractions,
and trig functions are not supported inside the equation box.
Also the "*" operator is not necessary when multiplying times x.