How to construct a pie chart

A PIE CHART

 This is a circle divided into sectors whose angles are proportional to the frequencies of the items. They are represented in degrees or percentages. The whole circle is 360 and it is measured by the use of protractor. It is referred to as pie

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SIMILAR CHARTS RELATED TO PIE CHART

1. DOUGHNUT CHART

A doughnutut chart (also spelled donut) is a variant of the pie chart, with a blank center allowing for additional information about the data as a whole to be included. Doughnut charts are similar to pie charts in that their aim is to illustrate proportions.[citation needed] This type of circular graph can support multiple statistics at once and it provides a better data intensity ratio to standard pie charts. It does not have to contain information in the center.

2. EXPLODED PIE CHART

 This is a chart with one or more sectors separated from the rest of the disk is known as an exploded pie chart. This effect is used to either highlight a sector, or to highlight smaller segments of the chart with small proportions.

3. 3D PIE CHART AND PERSPECTIVE PIE CAKE

A 3d pie chart, or perspective pie chart, is used to give the chart a 3D look. Often used for aesthetic reasons, the third dimension does not improve the reading of the data; on the contrary, these plots are difficult to interpret because of the distorted effect of perspective associated with the third dimension. The use of superfluous dimensions not used to display the data of interest is discouraged for charts in general, not only for pie charts.

PIE DIAGRAM  FORMULA
The pie chart is considered as one of the important types of data representation. It contains different sectors and segments also called pie in a pie chart. Each segment or sector forms a certain portion of the total percentage. The total of all is equal to 360 degrees. The total value of the pie is always 100%.

To get the pie diagram formula, the following steps are to be considered:
  1. Collect and categorize the information into meaningful data.
  2. From the data collected, calculate the total.
  3. Divide the categories according to the heads.
  4. Convert those numbers to percentages.
  5. The last step is to convert the percentages to degrees.
The pie diagram formula is given as = ( given data / total value of data ) x 360.


PRATICAL IMPLICATION OF PIE CHART 
The pie chart is extensively used because of its ease in data readability and access to information. It is the simplest form as data are easily compared in a pie chart. Some of the pie diagram examples in real life are as follows:
  1. In a  business, it is used to compare the growth areas such as business profits, turnover, exposure, etc.
  2. It is also used to represent categorical data.
  3. Pie charts are basically used for comparing data.
  4. In schools, pie charts may be used to show how much time is allotted for each section.
  5. Used to measure the relative size of data such as type of house people have, type of 2 wheelers or 4 wheelers people own.
  6. The number of customers arriving in the retail market on weekends.
  7. Types of food and beverages liked by people in a restaurant.
  8. Representation of mobile brands in the market.
  9. Comparison of sales of different brands.
ADVANTAGES OF USING PIE DIAGRAM
As already discussed, pie charts are considered a convenient graphical representation because of their ease of understanding data at one glance. This is possible as the pie is broken down into sectors representing the portion of the whole. Some of its advantages are listed below:
  1. The data is simple and in an easy to understand form.
  2. Data is represented visually
  3. To add on a few points, we can manipulate pieces of data in the form of sectors in a pie chart.
  4. No underlying numbers are required to read the data, as all information is presented in a pie chart.
  5. It provides a data comparison at a glance. The immediate analysis is possible by just looking at the pictorial presentation of Pie chart.
  6. It is also considered the best communication tool even to the unaware or uninformed readers. 

DISADVANTAGES OF USING PIE DIAGRAM
There are two sides to every aspect. Looking at a pie chart presentation also has some of the disadvantages associated with it. A few of them are listed below:

  1. It becomes less effective when too many pieces of information are to be displayed in a pie chart.
  2. When adding on too many pieces of information or making separate labels for each information creates clutter. It is often hard to read those data.
  3. The pie chart only represents one set of information.
  4. To compare multiple sets, a series of data is required.
  5. It makes it difficult for readers when a quick analysis is needed.











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