update links

Author: LiamConnors

julia/2D-Histogram.md

@@ -20,9 +20,7 @@ jupyter:
     order: 5
     page_type: example_index
     permalink: julia/2D-Histogram/
-    redirect_from:
-    - julia/2d-histogram/
-    - julia/2d-histograms/
+    redirect_from: julia/2d-histograms/
     thumbnail: thumbnail/histogram2d.jpg
 ---
 

julia/2d-histogram-contour.md

@@ -26,7 +26,7 @@ jupyter:
 
 ## 2D Histogram Contours or Density Contours
 
-A 2D histogram contour plot, also known as a density contour plot, is a 2-dimensional generalization of a [histogram](/julia/histograms/) which resembles a [contour plot](/julia/contour-plots/) but is computed by grouping a set of points specified by their `x` and `y` coordinates into bins, and applying an aggregation function such as `count` or `sum` (if `z` is provided) to compute the value to be used to compute contours. This kind of visualization (and the related [2D histogram, or density heatmap](/julia/2d-histogram/)) is often used to manage over-plotting, or situations where showing large data sets as [scatter plots](/julia/line-and-scatter/) would result in points overlapping each other and hiding patterns.
+A 2D histogram contour plot, also known as a density contour plot, is a 2-dimensional generalization of a [histogram](/julia/histograms/) which resembles a [contour plot](/julia/contour-plots/) but is computed by grouping a set of points specified by their `x` and `y` coordinates into bins, and applying an aggregation function such as `count` or `sum` (if `z` is provided) to compute the value to be used to compute contours. This kind of visualization (and the related [2D histogram, or density heatmap](/julia/2D-Histogram/)) is often used to manage over-plotting, or situations where showing large data sets as [scatter plots](/julia/line-and-scatter/) would result in points overlapping each other and hiding patterns.
 
 ### 2D Histograms with Graph Objects