Bases: sage.plot.primitive.GraphicPrimitive_xydata
Primitive class that initializes the line graphics type.
EXAMPLES:
sage: from sage.plot.line import Line
sage: Line([1,2,7], [1,5,-1], {})
Line defined by 3 points
Plots a 2D line in 3D, with default height zero.
EXAMPLES:
sage: E = EllipticCurve('37a').plot(thickness=5).plot3d()
sage: F = EllipticCurve('37a').plot(thickness=5).plot3d(z=2)
sage: E + F # long time (5s on sage.math, 2012)
Returns either a 2-dimensional or 3-dimensional line depending on value of points.
INPUT:
For information regarding additional arguments, see either line2d? or line3d?.
EXAMPLES:
sage: line([(0,0), (1,1)])
sage: line([(0,0,1), (1,1,1)])
Create the line through the given list of points.
INPUT:
Type line2d.options for a dictionary of the default options for lines. You can change this to change the defaults for all future lines. Use line2d.reset() to reset to the default options.
INPUT:
Any MATPLOTLIB line option may also be passed in. E.g.,
The linestyle can also be prefixed with a drawing style (e.g., "steps--")
markersize – the size of the marker in points
markeredgecolor – the color of the marker edge
markerfacecolor – the color of the marker face
markeredgewidth – the size of the marker edge in points
EXAMPLES:
A line with no points or one point:
sage: line([]) #returns an empty plot
sage: import numpy; line(numpy.array([]))
sage: line([(1,1)])
A line with numpy arrays:
sage: line(numpy.array([[1,2], [3,4]]))
A line with a legend:
sage: line([(0,0),(1,1)], legend_label='line')
Lines with different colors in the legend text:
sage: p1 = line([(0,0),(1,1)], legend_label='line')
sage: p2 = line([(1,1),(2,4)], legend_label='squared', legend_color='red')
sage: p1 + p2
Extra options will get passed on to show(), as long as they are valid:
sage: line([(0,1), (3,4)], figsize=[10, 2])
sage: line([(0,1), (3,4)]).show(figsize=[10, 2]) # These are equivalent
We can also use a logarithmic scale if the data will support it:
sage: line([(1,2),(2,4),(3,4),(4,8),(4.5,32)],scale='loglog',base=2)
Many more examples below!
A blue conchoid of Nicomedes:
sage: L = [[1+5*cos(pi/2+pi*i/100), tan(pi/2+pi*i/100)*(1+5*cos(pi/2+pi*i/100))] for i in range(1,100)]
sage: line(L, rgbcolor=(1/4,1/8,3/4))
A line with 2 complex points:
sage: i = CC.0
sage: line([1+i, 2+3*i])
A blue hypotrochoid (3 leaves):
sage: n = 4; h = 3; b = 2
sage: L = [[n*cos(pi*i/100)+h*cos((n/b)*pi*i/100),n*sin(pi*i/100)-h*sin((n/b)*pi*i/100)] for i in range(200)]
sage: line(L, rgbcolor=(1/4,1/4,3/4))
A blue hypotrochoid (4 leaves):
sage: n = 6; h = 5; b = 2
sage: L = [[n*cos(pi*i/100)+h*cos((n/b)*pi*i/100),n*sin(pi*i/100)-h*sin((n/b)*pi*i/100)] for i in range(200)]
sage: line(L, rgbcolor=(1/4,1/4,3/4))
A red limacon of Pascal:
sage: L = [[sin(pi*i/100)+sin(pi*i/50),-(1+cos(pi*i/100)+cos(pi*i/50))] for i in range(-100,101)]
sage: line(L, rgbcolor=(1,1/4,1/2))
A light green trisectrix of Maclaurin:
sage: L = [[2*(1-4*cos(-pi/2+pi*i/100)^2),10*tan(-pi/2+pi*i/100)*(1-4*cos(-pi/2+pi*i/100)^2)] for i in range(1,100)]
sage: line(L, rgbcolor=(1/4,1,1/8))
A green lemniscate of Bernoulli:
sage: cosines = [cos(-pi/2+pi*i/100) for i in range(201)]
sage: v = [(1/c, tan(-pi/2+pi*i/100)) for i,c in enumerate(cosines) if c != 0]
sage: L = [(a/(a^2+b^2), b/(a^2+b^2)) for a,b in v]
sage: line(L, rgbcolor=(1/4,3/4,1/8))
A red plot of the Jacobi elliptic function \(\text{sn}(x,2)\), \(-3 < x < 3\):
sage: L = [(i/100.0, real_part(jacobi('sn', i/100.0, 2.0))) for i in
....: range(-300, 300, 30)]
sage: line(L, rgbcolor=(3/4, 1/4, 1/8))
A red plot of \(J\)-Bessel function \(J_2(x)\), \(0 < x < 10\):
sage: L = [(i/10.0, bessel_J(2,i/10.0)) for i in range(100)]
sage: line(L, rgbcolor=(3/4,1/4,5/8))
A purple plot of the Riemann zeta function \(\zeta(1/2 + it)\), \(0 < t < 30\):
sage: i = CDF.gen()
sage: v = [zeta(0.5 + n/10 * i) for n in range(300)]
sage: L = [(z.real(), z.imag()) for z in v]
sage: line(L, rgbcolor=(3/4,1/2,5/8))
A purple plot of the Hasse-Weil \(L\)-function \(L(E, 1 + it)\), \(-1 < t < 10\):
sage: E = EllipticCurve('37a')
sage: vals = E.lseries().values_along_line(1-I, 1+10*I, 100) # critical line
sage: L = [(z[1].real(), z[1].imag()) for z in vals]
sage: line(L, rgbcolor=(3/4,1/2,5/8))
A red, blue, and green “cool cat”:
sage: G = plot(-cos(x), -2, 2, thickness=5, rgbcolor=(0.5,1,0.5))
sage: P = polygon([[1,2], [5,6], [5,0]], rgbcolor=(1,0,0))
sage: Q = polygon([(-x,y) for x,y in P[0]], rgbcolor=(0,0,1))
sage: G + P + Q # show the plot
TESTS:
Check that trac ticket #13690 is fixed. The legend label should have circles as markers.:
sage: line(enumerate(range(2)), marker='o', legend_label='circle')