Bar chart is the first volume of the fourth grade of the new curriculum reform of People's Education Edition.
In the first stage, students went through the process of data collection, collation, description and analysis. They can express the statistical results with simple statistical charts and ask some simple questions according to the statistical charts. They experienced the process of solving problems by statistical methods, understood the role and significance of statistics in real life, and initially established the concept of statistics.
Bar charts have different forms according to the type and complexity of the data they represent. In some cases, they can be as simple as two bar charts, such as a chart showing the total votes of two competing political candidates.
As information becomes more and more complex, charts will become more and more complex, even in the form of grouped or clustered bar charts or stacked bar charts.
Single: A single bar chart is used to convey the discrete values of each item category displayed on the opposite axis. For example, show that
The number of boys in grades 4-6 ranges from 1995 to 20 10. The actual number (discrete value) can be represented by a scale bar, and the scale is displayed on the X axis.
Y
The axis will show the corresponding year. The longest bar on the chart represents the year from 1995 to 20 10, and the number of men in grades 4-6 reaches the maximum. The shortest bar represents 4-6.
The year when the number of boys in this grade reached the minimum.
Grouping: Grouping or aggregation bar charts are used to represent discrete values of multiple items in the same category. In the single bar chart example above, only one item (4-6) is displayed.
Number of boys in grade). But you can add a second value (including 4-6).
The number of women in the grade) to easily modify the chart.
Bars representing each gender by year will be combined and color-coded to clearly show which bars represent the values of men and women. Then, this grouped bar chart allows readers to easily compare by grade and gender.
Number of students in grades 4-6.
Stacking: Some bar charts divide each bar into sub-parts, which represent the discrete values of items that form part of the whole group. For example, in the above example, students in grades 4-6 are grouped together and represented by a bar. This column can be divided into several parts to show the proportion of students in each grade. Similarly, color coding is needed to make the graphics readable.