Computes the sum of squared distances between the original data and
reconstructed outline. It allows examining reconstructed outlines with the
addition of successive contributing harmonics indicated in the argument
`nharm`

.

## Usage

```
efourier_error(
x,
nharm = NULL,
type = c("error", "outline", "deviations"),
plot = TRUE,
ncol = NULL,
nrow = NULL
)
```

## Arguments

- x
An object computed with

`efourier()`

.- nharm
An integer or vector of integers indicating the number of harmonics to use. If not specified the number of harmonics used in

`x`

is used.- type
The type of plot to produce. By default, a line plot with the sum of squared distances (y-axis) and the number of harmonics (x-axis) is produced. If

`type = "outline"`

is used, a plot with the original polygon and the constructed outline is produced. If`type = "deviations"`

is used, a plot with the deviations from the original outline and reconstructed outline (y-axis) and points along the outline (x-axis) is produced.- plot
A logical to inform if a plot should be produced. Defaults to

`TRUE`

.- ncol, nrow
The number of rows or columns in the plot grid. Defaults to

`NULL`

, i.e., a square grid is produced.

## Value

A list with the objects:

`dev_points`

A list with the deviations (distances) from original and predicted outline for each pixel of the outline.`data.frame`

object with the minimum, maximum and average deviations (based on the outline points).

If `x`

is an object of class `efourier_lst`

, a list will be returned.