What does the horizontal axis of the bar graph represent? What does the vertical axis mean?

The horizontal axis of the bar graph represents time, and the vertical axis represents data volume.

A bar chart represents a certain quantity by unit length, draws straight bars with different lengths according to the quantity, and then arranges these straight bars in a certain order. It is easy to see various numbers from the bar chart. Bar charts are generally called bar charts, also called bar charts or bar charts.

Extended data:

I. Elements

1, number of groups

The guiding experience is to divide the data into 5~ 10 groups.

2. Group width

Generally speaking, the width of each group is the same. The selection of the number and width of groups is not independent, and an empirical criterion is:

Approximate group width = (max-min)/number of groups

Then determine the initial approximate group width according to rounding, and then adjust it according to the data situation.

3. Group restrictions

It is divided into a group lower limit (the smallest data that may enter the group) and a group upper limit (the largest data that may enter the group), and a data can only be within one group limit.

When drawing a bar graph, there are gaps between different groups; When plotting histograms, there are no gaps between different groups.

Second, production.

1. According to the size of the drawing, draw two perpendicular lines as the longitudinal axis and the horizontal axis.

2. Distribute the positions of the bars appropriately on the horizontal ray (horizontal axis) and determine the width and interval of the straight bars.

3, determine the unit length on the vertical axis, and mark the number and measurement unit.

4. According to the size of the data, draw straight lines with different lengths and mark them with titles.

5. If the bar is too small, you can paint the color on it appropriately.

Baidu Encyclopedia-Bar Chart