libpysal.cg.Line¶

class libpysal.cg.Line(m, b)[source]¶

Geometric representation of line objects.

Raises:¶

ArithmeticError – Raised when infinity is passed in as the slope.

Examples

>>> ls = Line(1, 0)
>>> ls.m
1.0

>>> ls.b
0.0

Create a line from its slope and intercept.

Parameters:¶

m : {int, float}¶

The slope of the line. m is also an attribute.

b : {int, float}¶

The \(y\)-intercept of the line. b is also an attribute.

Methods

x(y)	Returns the \(x\)-value of the line at a particular \(y\)-value.
y(x)	Returns the \(y\)-value of the line at a particular \(x\)-value.

x(y)[source]¶

Returns the \(x\)-value of the line at a particular \(y\)-value.

Parameters:¶

y : {int, float}¶

The \(y\)-value at which to compute \(x\).

Raises:¶

ArithmeticError – Raised when 0. is passed in as the slope.

Examples

>>> l = Line(0.5, 0)
>>> l.x(0.25)
0.5

y(x)[source]¶

Returns the \(y\)-value of the line at a particular \(x\)-value.

Parameters:¶

x : {int, float}¶

The \(x\)-value at which to compute \(y\).

Examples

>>> l = Line(1, 0)
>>> l.y(1)
1.0