Simple Graph types Which Graph best represents my data?www.LCDing.Com
Types of Simple Graphs Line Charts Area Charts Column Charts Bar Charts Segmented Bar / Column Charts 100% Segmented Bar/Column Charts Pie Charts Doughnut Charts
Which Chart?This slide is taken from a “ must-visit ” site http://www.extremepresentation.com/
Charts shown in this presentationThis slide is taken from a “ must-visit ” site http://www.extremepresentation.com/
Line Charts Use line charts to show Change in Variables / trends over time Long rows of continuous data of variables Compare and correlate two parameters over a period of time. X axis to conventionally display time interval Y axis to display the data variablesNote : Line graph connects two actual or real data points at different time intervals. Hence, any point between the two actual or real data points should not be considered as actual value of the variable.
Line Chart example Sales of East Zone by QTR - 2009 50 40Sales in Rupees 30 20 10 0 Mar-10 Apr-10 Oct-10 May-10 Dec-10 Jul-10 Jan-10 Aug-10 Sep-10 Nov-10 Feb-10 Jun-10 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Target 30.6 38.6 34.6 31.6 30.6 38.6 34.6 31.6 30.6 38.6 34.6 31.6 Sales 32.7 40.3 38.2 30 32.6 38.7 35 33 31 39 33 36 As Data labels may clutter the chart, a data table is used to show the variables As the data Table has the legend Included, No separate legend was given
Area Charts Area Charts are similar to line charts Use area charts to Relative contributions over time Show cumulated data over a period of time Eg: YTD Sales Vs YTD Target progress Area Charts show change in volume or quantum over time
Area Charts Example Cumulated Monthly Sales Progress Vs Target - Zone 1 - Y 2010 450 400 350Sales in K Euro 300 250 200 150 100 50 0 Oct-10 Nov-10 Feb-10 Dec-10 Apr-10 May-10 Jul-10 Aug-10 Sep-10 Jan-10 Jun-10 Mar-10 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Sales 34.5 76 115 152 179 221.5 252 292 326 364.5 392 427.5 Target 30.6 69.2 103.8 135.4 166 204.6 239.2 270.8 301.4 340 374.6 406.2
Column Chart Use column charts to Display how values change over time Compare data of single items at specific time intervals Compare multiple sets of variables of nominal data Nominal data – e.g.: Territories, individuals etc. Convention is - data categories on horizontal axis and the values along the vertical axisNote :If the number of time intervals or units of Nominal data are many, use line charts as the data gets cluttered and the essence of the chat may be lost
Column Charts example Sales of East Zone by QTR - 2009 100 90 90 80 70Sales in Rupees 60 Zone 1 45.9 46.9 45 43.9 50 Zone 2 38.6 40 34.6 31.6 Zone 3 30.6 27.4 30 20.4 20.4 20 10 0 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Quarters in 2009
Bar Charts example This chart type is similar to a column chart Values are plotted horizontally rather than vertically. Hence, more emphasis on comparison, rather than time. Customary to arrange variables in a descending order.
Bar / Column - Sub types 1. Segmented Bar /Column chart Values are stacked on each other 2. 100% Segmented The percentage of each value is stacked
Segmented Column/Bar Chart Use segmented bars or columns to... Present a part -whole relation over time Show proportional relationships over time Show sub-elements which contribute to the overall column or bar and changes from one period to another. Segmented column/bar charts are more accurate than pie chart, because distances can be more accurately estimated than areas.
Segmented Column Chart Example Sales of zones by quarters-2010180160 45140120 34.6100 46.980 45.9 43.960 38.6 9040 30.6 31.620 20.4 27.4 20.4 0 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Zone 1 Zone 2 Zone 3
100% Segmented Column Chart Contribution of zones by Quarters-2010 100% 90% 45 80% 45.9 46.9 43.9 70% 60% 34.6 50% 40% 38.6 31.6 30.6 30% 90 20% 10% 20.4 27.4 20.4 0% 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Zone 1 Zone 2 Zone 3
Pie Chart Use pie chart to Compare Parts to Whole at a given point of time Either the value or Percent to whole can be represented Can plot only one data series as snap shot at a specific time Ideal only if the number of categories are less than 6 Note : Too many slices in the pie can clutter a pie chart . It is customary to club many small slides in to a category called “Others”. Incase the details are needed , a combination of Pie and a Bar Char are used
Pie Chart Example Contribution of Sales in K euros by Zones 2010 20.4 20.4 27.4 90 North South East West
Doughnut Chart This chart is similar to a pie chart. It shows the relationship of the parts to the whole. In this type of chart, it is possible to chart more than one data series to compare
Doughnut Chart example Sales of Zones 2009 Vs.2010 Y10, 28.6 Y09, 38 Y09, 20.4 Y10, 42 Zone 1 Zone 2 Zone 3 Y09, 27.4 Zone 4 Y09, 36 Y10, 34.9 Y10, 34.8