Help: Solving area
When the
Go button is pressed to start the
numerical solution process, the Solving area appears at lower left.
This contains
a Progress Bar which shows the progress of the solution: the solution
is be complete when the coloured area reaches the right end of the
Progress Bar. When this happens, the Solving area shows how many times the
derivatives were evaluated. Thus if the
Euler algorithm is used with
"Number of steps" set to 50, the Solving area
will show
"Derivatives evaluated
at 51 points": one for each step of the method, and an additional one for
the final value. On the other hand, each step of
Improved Euler evaluates
the derivatives twice, so the same calculation with the Improved Euler algorithm
will show "Derivatives evaluated at 101 points".
If the solution process is stopped, either by
pressing the Stop button, violating a side condition or encountering
an error condition (such as an undefined function), the Progress Bar
remains incomplete and the Solving area indicates what happened and
at what value of the independent variable.
Press the OK button to make the area disappear.