# omxCheckWithinPercentError: Approximate Percent Equality Testing Function In OpenMx/OpenMx: Extended Structural Equation Modelling

## Description

This function tests whether two numeric vectors or matrixes are approximately equal to one another, within a specified percentage.

## Usage

 `1` ```omxCheckWithinPercentError(a, b, percent = 0.1) ```

## Arguments

 `a` a numeric vector or matrix. `b` a numeric vector or matrix. `percent` a non-negative percentage.

## Details

Arguments ‘a’ and ‘b’ must be of the same type, ie. they must be either vectors of equal dimension or matrices of equal dimension. The two arguments are compared element-wise for approximate equality. If the absolute value of the difference of any two values is greater than the percentage difference of ‘a’, then an error will be thrown.

## References

The OpenMx User's guide can be found at http://openmx.ssri.psu.edu/documentation.

`omxCheckCloseEnough`, `omxCheckIdentical`, `omxCheckSetEquals`, `omxCheckTrue`, `omxCheckEquals`
 ```1 2 3 4 5 6``` ```omxCheckWithinPercentError(c(1, 2, 3), c(1.1, 1.9 ,3.0), percent = 50) omxCheckWithinPercentError(matrix(3, 3, 3), matrix(4, 3, 3), percent = 150) # Throws an error try(omxCheckWithinPercentError(c(1, 2, 3), c(1.1, 1.9 ,3.0), percent = 0.01)) ```