findZerosMult: Find the zeros of a function of two or more variables
Description
Compute numerically zeros of a function of two or more variables.
All free variables (all but the variable on the right side) named in the expression must be assigned
a value via \ldots
Usage
findZerosMult(..., npts = 10, rad = 5, near = 0, sortBy = "byx")
Value
A data frame of numerical values which should all result in a value of zero when input into
original function
Arguments
...
arguments for values NOTE: if the system has more than one equation and the rhs
variables do not match up, there will be an error.
npts
number of desired zeros to return
rad
radius around near in which to look for zeros
near
center of search for zeros
sortBy
options for sorting zeros for plotting. Options are 'byx', 'byy' and 'radial'. The
default value is 'byx'.
Author
Cecylia Bocovich
Details
sorts points in the domain according to the sign of the function value at respective points.
Use continuity and uniroot to find zeros between points of opposite signs. Returns any number of
points which may be sorted and plotted according to x, y, or radial values.