3.4 Weighted Frequency of Articles
![A plot showing the importance of all topics over time on a single graph, as measured by weighted frequency. The underlying data is in Table B.3. It is mostly a mess of dots that doesn't show very much, but what information can be gleaned by looking is described in the text below.](lda-bookdown_files/figure-html/graph3a-1.png)
Figure 3.5: All ninety topics—weighted frequency of articles.
There are some dots in the upper-left quadrant, and then a bunch of dots bouncing along the bottom tenth of the graph. It isn’t very informative, and breaking it out by topic doesn’t help a lot.
![The same data as above, but with each topic shown as a separate facet](lda-bookdown_files/figure-html/graph3b-1.png)
Figure 3.6: The ninety topics—weighted frequency of articles (faceted).
In this case, cutting down the to the last seventy-five years produces a much more readable graph.
![The same data as above, but with each topic shown as a separate facet](lda-bookdown_files/figure-html/graph3c-1.png)
Figure 3.7: All ninety topics—weighted frequency of articles.
There are too many overlapping dots here to see much, but the animation is a little clearer.
And the result is an animated version of some graphs that appeared a lot in the previous chapter.