libpysal.cg.Rectangle

class libpysal.cg.Rectangle(left, lower, right, upper)[source]

Geometric representation of rectangle objects.

Attributes
leftfloat

Minimum x-value of the rectangle

lowerfloat

Minimum y-value of the rectangle

rightfloat

Maximum x-value of the rectangle

upperfloat

Maximum y-value of the rectangle

__init__(self, left, lower, right, upper)[source]

Returns a Rectangle object.

__init__(number, number, number, number) -> Rectangle

Parameters
leftthe minimum x-value of the rectangle
lowerthe minimum y-value of the rectangle
rightthe maximum x-value of the rectangle
upperthe maximum y-value of the rectangle

Examples

>>> r = Rectangle(-4, 3, 10, 17)
>>> r.left #minx
-4.0
>>> r.lower #miny
3.0
>>> r.right #maxx
10.0
>>> r.upper #maxy
17.0

Methods

__init__(self, left, lower, right, upper)

Returns a Rectangle object.

set_centroid(self, new_center)

Moves the rectangle center to a new specified point.

set_scale(self, scale)

Rescales the rectangle around its center.

Attributes

area

Returns the area of the Rectangle.

height

Returns the height of the Rectangle.

width

Returns the width of the Rectangle.

property area

Returns the area of the Rectangle.

area -> number

Examples

>>> r = Rectangle(0, 0, 4, 4)
>>> r.area
16.0
property height

Returns the height of the Rectangle.

height -> number

Examples

>>> r = Rectangle(0, 0, 4, 4)
>>> r.height
4.0
set_centroid(self, new_center)[source]

Moves the rectangle center to a new specified point.

set_centroid(Point) -> Point

Parameters
new_centerthe new location of the centroid of the polygon

Examples

>>> r = Rectangle(0, 0, 4, 4)
>>> r.set_centroid(Point((4, 4)))
>>> r.left
2.0
>>> r.right
6.0
>>> r.lower
2.0
>>> r.upper
6.0
set_scale(self, scale)[source]

Rescales the rectangle around its center.

set_scale(number) -> number

Parameters
scalethe ratio of the new scale to the old scale (e.g. 1.0 is current size)

Examples

>>> r = Rectangle(0, 0, 4, 4)
>>> r.set_scale(2)
>>> r.left
-2.0
>>> r.right
6.0
>>> r.lower
-2.0
>>> r.upper
6.0
property width

Returns the width of the Rectangle.

width -> number

Examples

>>> r = Rectangle(0, 0, 4, 4)
>>> r.width
4.0