charts and its types

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 A chart is a pictorial representation of data used to compare, analyze, observe patterns and trends in data. A chart can be 2D or 3D.

Types of charts


Column Charts - They compare distinct items. In this chart category axis is horizontal (Xaxis) and value axis is vertical (Y-axis). It is important to keep the number of series in a column chart to a minimum. Many series cause the column to become narrow and difficult to analyze. Column charts are used for making comparisons. Bar Charts - Compare different items or show single items at different intervals. It is similar to column chart except that the chart value axis is horizontal (X-axis) and category axis is vertical (Y-axis). 

Area Charts – They show the relative contributions of each value to a total over time. Line Charts - These charts are useful to compare the trends over time. 

Pie Charts - The chart show the proportion of each part value to the total value in a data series. They are used to show proportional sales figures or representation of different categories of population like workers/non-workers, male/female, adults/children, etc. 

Advantages of charts:

1. They present data in a more attractive way.
2. The make it easy to compare and understand data.

Components of a Chart
1. Data Series: data entries from which a chart is derived.
2. X-Axis: horizontal axis (also known as category axis).
3. Y-Axis: vertical axis (also known as value axis).
4. Chart Title: tells what the chart represents.
5. Chart Area: covers all the components of the chart.
6. Plot Area: area bounded by the two axes.
7. Legend: identifies each data series by giving a unique color or pattern to each data series.

8. Gridlines: lines that run from X Axis and Y axis.

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