sage.plot: Update # needs

Author: Matthias Koeppe

src/sage/plot/arc.py

@@ -56,6 +56,7 @@ def __init__(self, x, y, r1, r2, angle, s1, s2, options):
 
         EXAMPLES::
 
+            sage: # needs sage/symbolic
             sage: A = arc((2,3),1,1,pi/4,(0,pi))
             sage: A[0].x == 2
             True

src/sage/plot/ellipse.py

@@ -220,7 +220,7 @@ def plot3d(self):
         TESTS::
 
             sage: from sage.plot.ellipse import Ellipse
-            sage: Ellipse(0,0,2,1,pi/4,{}).plot3d()
+            sage: Ellipse(0,0,2,1,pi/4,{}).plot3d()                                     # needs sage.symbolic
             Traceback (most recent call last):
             ...
             NotImplementedError

src/sage/plot/line.py

@@ -559,6 +559,7 @@ def line2d(points, **options):
 
     A purple plot of the Riemann zeta function `\zeta(1/2 + it)`, `0 < t < 30`::
 
+        sage: # needs sage.libs.pari sage.rings.complex_double
         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]

src/sage/plot/matrix_plot.py

@@ -535,7 +535,7 @@ def matrix_plot(mat, xrange=None, yrange=None, **options):
 
     ::
 
-        sage: matrix_plot([[sin(x), cos(x)], [1, 0]])
+        sage: matrix_plot([[sin(x), cos(x)], [1, 0]])                                   # needs sage.symbolic
         Traceback (most recent call last):
         ...
         TypeError: mat must be a Matrix or a two dimensional array