1 determining effective data display with charts
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Determining Effective Data Display with Charts
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Chart Types Covered2
ColumnLinePieStockXY (Scatter)AreaBubble
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Visualizing Data3
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Data Graphics Principles4
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Data Graphics Principles5
“Above all else show the data” Reminder not to clutter a chart by adding unneeded
illustration or decoration.
“Maximize the data-ink ratio” Refers to the portion of ink that is devoted to
displaying the data vs. the portion of graphic that can be removed without losing the data.
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Data Graphics Principles6
“Erase non-data-ink” Non-data-ink is a part of the chart that decorates
more than informs.
“Erase redundant data ink” Redundant data ink is ink that repeats information.
“Revise and edit” Revise and edit charts like you would a piece of
writing.
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Data Graphics Principles7
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Effective Charting in Excel8
Creating Chart in Excel Select data to display Click Insert tab on Ribbon Click a button in Charts group or dialog box launcher
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Chart Types9
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Understanding Line and Column Charts10
• Line chart- displays trends over time or by category.
• Column chart- compares values across categories in a vertical orientation.
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Understanding Line and Column Charts11
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Comparing Line andXY (Scatter) Charts
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• XY (Scatter) charts plot numeric values on both the X- and Y- axes based on the value of the data.
Whereas a line chart plots numeric values on one axis and category labels equidistantly on the other axis.
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Comparing Line andXY (Scatter) Charts
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Changing the Chart Source Data14
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Results of Changing Source Data15
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Specifying Chart Layout Options16
• Click chart to display Chart Tools contextual tabs• Chart Tools Layout Tab
• Options grouped by Labels, Axes, and Background
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Specifying Chart Options17
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Specifying Chart Options18
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Chart Options19
• Area chart- combines the features of a line chart with a bar or column chart by filling in the area below the line, and displaying the trend values over time or categories.
• Pie chart- displays the percentage contribution that each category makes to a whole or 100%.
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Column Charts and Area Charts20
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Selecting Pie Chart Source Data21
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Pie Charts22
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Formatting Data Labels23
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Working with 3-D Charts24
2-D Line chart
2-D Column chart
3-D Line chart
3-D Column chart
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Summary 125
Using charts to illustrate quantitative information adds visual analysis to problem solving
How choice of chart type can influence viewer’s perception of information presented
Differences between main chart typesDifferent interpretation of data can result
from use of different chart type
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Objectives:Evaluating Chart Sub-Types
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Examine the effectiveness of different chart sub-types
Evaluate the stacked and 100% stacked sub-types
Explore the Pie of Pie and Bar of Pie sub-types
Create various stock charts to display financial data
Clarify data with trendlines and moving averages
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Examining Sub-types for Various Chart Types
Stacked charts • Illustrate cumulative effects of data in categories
• Available for line, bar, column, area charts
Summing to 100% (100% stacked sub-type)
• Illustrate cumulative (rather than individual) contribution for each category as a percentage
• Available for line, bar, column, area charts• Combines features of a pie chart with
features of line, column, or area charts• Similar to pie except pieces are in a column
instead of a circle
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Adding Things Up:Stacked Chart Options
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Original area chart
Stacked column chart
Stacked area chart
Stacked line chart
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Summing to 100%:Alternatives to Pie Charts
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Original area chart
100% stacked column chart
100% stacked area chart
100% stacked line chart
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Summing to 100%:Alternatives to Pie Charts
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Showing the cumulative contribution for each category as a percentage can reduce confusion over whether the line on the chart represents the individual or cumulative contribution to the whole.
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Slicing the Pie Too Thin: Summarizing Too Much Detail in Pie Charts
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An excessive number of pie slices makes the chart cluttered and confusing.
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Pie of Pie and Bar of Pie Chart Sub-Types32
Decrease number of pie segments to improve visual display of data
Use Format Data Series dialog box to select options for splitting data series Position Value Percent Value Custom
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Pie of Pie Sub-Type33
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Using Format Data Series to Change the Format
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Applied Formatting Changes35
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Doughnut Charts36
Show individual percentages contained in a pie chart for more than one series
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Doughnut Charts37
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Monitoring a Businesswith Stock Charts
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Excel stock reporting charts are somewhat based on the candlestick plot format
Stock chart sub-types High-Low-Close Open-High-Low-Close Volume-High-Low-Close Volume-Open-High-Low-Close
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Sample High-Low-Close Chart39
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Sample Open-High-Low-Close Chart40
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Sample Volume-High-Low-Close Chart41
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Sample Volume-Open-High-Low-Close Chart42
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Adding Trendlinesand Moving Averages
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Trendlines Graphically illustrate trends in data using a statistical
technique known as regressionMoving average line
Used to smooth out the data, making it easier to spot trends
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Adding Trendlinesand Moving Averages
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Summary 245
Chart sub-types for line, column, and area charts (stacked and 100% stacked)
Pie of Pie and Bar of Pie chart sub-typesSub-types of stock chartsClarifying data in stock charts using
trendlines and moving averages
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Chart Summary46
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