Merge pull request 3b1b#22 from eulertour/docs-update

Docs update

.travis.yml

@@ -0,0 +1,22 @@
+group: travis_latest
+language: python
+cache: pip
+matrix:
+  include:
+    - python: 3.7
+      dist: xenial    # required for Python 3.7 (travis-ci/travis-ci#9069)
+      sudo: required  # required for Python 3.7 (travis-ci/travis-ci#9069)
+install:
+  - pip install --upgrade pip
+  - pip install -r requirements.txt
+  - pip install flake8
+before_script:
+  # stop the build if there are Python syntax errors or undefined names
+  - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
+  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
+  - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+script:
+  - true  # add other tests here
+notifications:
+  on_success: change
+  on_failure: change  # `always` will be the setting once code changes slow down

active_projects/eola2/cramer.py

@@ -1209,7 +1209,7 @@ def construct(self):
             height=1.25,
         )
         system.to_corner(UL)
-        system.matrix_mobject.set_color_columns(X_COLOR, Y_COLOR)
+        system.matrix_mobject.set_column_colors(X_COLOR, Y_COLOR)
         system.input_vect_mob.elements.set_color(WHITE)
         system_rect = BackgroundRectangle(system, buff=MED_SMALL_BUFF)
 
@@ -1590,7 +1590,7 @@ def transform_space(self):
         apply_words = TextMobject("Apply")
         apply_words.add_background_rectangle()
         matrix_mobject = IntegerMatrix(self.matrix)
-        matrix_mobject.set_color_columns(X_COLOR, Y_COLOR)
+        matrix_mobject.set_column_colors(X_COLOR, Y_COLOR)
         matrix_mobject.add_background_rectangle()
         matrix_mobject.next_to(apply_words, RIGHT)
         matrix_brace = Brace(matrix_mobject, DOWN, buff=SMALL_BUFF)
@@ -1773,7 +1773,7 @@ def solve_for_coord(self):
         denom_det_text = get_det_text(matrix_mobject_copy)
         top_matrix_mobject = IntegerMatrix(new_matrix)
         top_matrix_mobject.set_height(frac_matrix_height)
-        top_matrix_mobject.set_color_columns(X_COLOR, Y_COLOR)
+        top_matrix_mobject.set_column_colors(X_COLOR, Y_COLOR)
         VGroup(*top_matrix_mobject.mob_matrix[:, self.index]).set_color(MAROON_B)
         top_matrix_mobject.add_background_rectangle()
         num_det_text = get_det_text(top_matrix_mobject)
@@ -1986,7 +1986,7 @@ def construct(self):
         x, y, z = coords = VGroup(*list(map(TexMobject, "xyz")))
         coords.set_color_by_gradient(*colors)
         matrix = IntegerMatrix(np.identity(3))
-        matrix.set_color_columns(*colors)
+        matrix.set_column_colors(*colors)
         det_text = get_det_text(matrix)
         equals = TexMobject("=")
         equals.next_to(det_text[0], LEFT)