4/25/2021 0 Comments Treemap Chart Uses
However, it is difficult and time-consuming to determine the top five overall performers.In many cases, simpler visualizations such as bar charts are preferable.They capture two types of information in the data: (1) the value of individual data points; (2) the structure of the hierarchy.
Treemap Chart Uses Series Of NestedThey are made of a series of nested rectangles of sizes proportional to the corresponding data value. A large rectangle represents a branch of a data tree, and it is subdivided into smaller rectangles that represent the size of each node within that branch. A) represents the entire SP 500 and is the same as the root of the tree. Within the Technology sector, a smaller rectangle is Communications Equipment (C). Finally, within the Communications Equipment rectangle, all the smaller rectangles represent individual companies within that sector, such as Cisco Systems (D), Qualcomm, and so on. The color of each rectangle shows if the value of that stock is moving up or down very bright red indicates a big shift downward, and very bright green indicates a big shift upwards. At the lowest level of the hierarchy (individual companies), Google (E) has a larger market cap than Facebook (F), and so their relative rectangles are sized appropriately. One level up in the hierarchy ( Industry ), the entire Internet Information Providers (G) category is larger than Application Software (H), and their rectangles are appropriately sized to show that differences as well. Designers often choose them to add visual variety on a dense dashboard. However, treemaps are a complex visualization and present many obstacles to quick comprehension (which is the main requirement for any information displayed on a dashboard). Color can identify items that are underperforming (or overperforming) compared to their siblings from the same category. This is why FinVizs Map of the Market is an enduring example of treemaps: it allows users to identify companies that are doing better than their industry peers, even though their overall stock value may be quite small. If color is used to express a quantitative value, its strongly encouraged to use only one color (if all the numbers are positive) or two colors (one for negative and one for positive), and vary the intensity of the color to express precise value. As humans dont perceive colors to have an inherent order, we strongly recommend that you do not use multiple colors to represent a range of numbers. Unfortunately, there is no universal natural mapping that says that blue is less than yellow or than red. Instead, it would have been better if the intensity of single color was used to indicate percentage. However, as with any use of color in a data visualization, restraint in the number of colors is strongly advised. In this design, some (but not all) rectangles do contain the recommended alternative cue: for example, the AMZN rectangle in the upper middle is annotated with 1.28, which informs users that this stock is up even if they cant tell that its green. The second image is from a color-blindness simulator ). Unfortunately, area is not one of these preattentive attributes. Treemap Chart Uses Code The ValueTreemaps rely on area (and possibly color) to encode the value of a variable, and therefore, although treemaps can convey overall relationships in a large data set, they are not suited for tasks involving precise comparisons. Color is used to designate the different factories and size is used to show the production outputs. While this visualization compresses a lot of data into a small space, the information it conveys efficiently is very high-level for example, its easy to identify the top performers in each category.
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