# LineFromNPoints

Constructs a line from a list of points.

## LineFromNPoints Inputs

Parameter | Description
Point 0 | Specifies the coordinates of the first point.
Point X 0 | The x-coordinate of the first point.
Point Y 0 | The y-coordinate of the first point.
Point 1 | Specifies the coordinates of the second point.
Point X 1 | The x-coordinate of the second point.
Point Y 1 | The y-coordinate of the second point.
Point 2..N | Specifies the coordinates of any additional points.
Point X N | The x-coordinate of the Nth point.
Point Y N | The y-coordinate of the Nth point.
Show | Specifies the graphics items to be displayed on a permanent basis.
0 = hide all | All graphics items will be hidden except when the cell containing the LineFromNPoints function is the active cell in the spreadsheet.
1 = result graphics only | The fitted line graphic will be displayed at all times. The input points will only be displayed when the cell containing the LineFromNPoints function is the active cell in the spreadsheet.
2 = input and result graphics | The fitted line and the input points will be displayed at all times.

## LineFromNPoints Outputs

Returns | A LineFit data structure if two or more valid points are included in data, or #ERR if only one or no valid point is included in data.
Results | When the function is initially inserted into a cell, the following LineFit Vision Data Access Functions are automatically inserted into the spreadsheet to create a result table:
Label | Function | Description
X0 | GetX(LineFit, 0) | The x-coordinate of the first endpoint.
Y0 | GetY(LineFit, 0) | The y-coordinate of the first endpoint.
X1 | GetX(LineFit, 1) | The x-coordinate of the second endpoint.
Y1 | GetY(LineFit, 1) | The y-coordinate of the second endpoint.
Chi2 | GetChi2(LineFit) | The sum of the squares of the distances from the points to the line.
Additional data elements can be accessed using the following Vision Data Access Functions:
Label | Function | Description
--- | --- | ---
Distance | GetDistance(LineFit, Index) | The distance between the indexed point and the line.
MaxDist | GetMaxDist(LineFit) | The point that is farthest from the line.
MaxDistIndex | GetMaxDistIndex(LineFit) | The index of the point that is farthest from the line.
NPointsUsed | GetNPointsUsed(LineFit) | The number of points used to compute the line.