eluna 2015 data visualization
TRANSCRIPT
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Data VisualizationAnalyzing your library data
ELUNA 2015 MinneapolisMichael Cummings, GWU
ELUNA
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Agenda
Data visualization goals
Access: Crosstab query
Tableau Software
Extract, transform, load (ETL)
Excel: Filters, Pivot table & chart
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Data Visualization Goals
Task: Searching for significant facts Goal: Discovery
Task: Examining and making sense of data Goal: Understanding
Task: Conveying information to others Goal: Informed Decisions
“Why do we visualize quantitative data?” by Stephen Few http://www.perceptualedge.com/blog/?p=1897
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Extract, transform, load (ETL)
ELUNA
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Extract, Transform, Load
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• Open Interface Web Services API
• Canned Access Reports
• Global Data Change
(Voyager)
Extract, Transform, Load: tools
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• SQL*Plus - delimited text file - xml data file
• Linux Shell scripts automation
<XML> XSLT • XML / XSLT stylesheet transform
Extract, Transform, Load: tools
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• Access - Crosstab query
• Excel - Pivot Table - Pivot Chart - Functions - Sort & filter
• Google Refine
• CGI / Perl
• OAI / PMH
• curl, z39.50,JSON, Python, and more
…
Extract, Transform, Load: tools
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Extract, Transform, Load: examples
• How to use:• Access crosstab query• Excel sort and filter• Excel Pivot table and Pivot chart• Tableau Public
Download this supplemental file whichincludes:
• Sample Access Report• SQL*Plus query to output XML data• Sample XSLT stylesheet to transform
XML data• OAI / PMH syntax and sample query• curl syntax and sample query• JSON sample text, screen shot of a
custom catalog built with Django & Python
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Access: Crosstab query
ELUNA
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Access
Standard query
Results: Each Fiscal Period is a row
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Access Crosstab query: Configuration
Crosstab Row Heading = BIB_INDEX.DISPLAY_HEADING Crosstab Column Heading = FUNDLEDGER_VW.FISCAL_PERIOD_NAME Crosstab Value = Expression ‘Fund Amount’ as Sum(CCur([AMOUNT]/100))
Crosstab query
What’s different:
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Access Crosstab query: Results
The crosstab query output shows the year by year expenditure for each ISSN.
The highlighted row for number 0217-7323 is the same dataset from the standard query, except the values are shown in columns labelled by fiscal year.
Crosstab query results
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Excel: Sort & Filter
ELUNA
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Excel Sort & Filter
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Excel: Pivot Table
ELUNA
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• Select all rows, columns • Select the Insert tab
• Select Pivot Table
• Choose new worksheet
Excel Pivot Table: Selection
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Excel Pivot Table: Step 1
Step 1. Select field(s)
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Excel Pivot Table: Steps 2 and 3
ISSN
FY
Step 2. Place field(s)
Amount Value field setting: Sum
Number format Currency
Step 3. Configure value
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Excel Pivot Table: 2010-2014
• Changed label from Amount to Expenses (cell A3)• Filtered the FY / fiscal year to 2010 through 2014 (cell B3)
ISSN
FY
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Excel Pivot Table: 2009-2015 with conditional formatting
To create a conditional format:
• Go to the Design tab on the menu and choose a design theme • Go to the Home tab on the menu, choose a Conditional formatting color
theme
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Excel: Pivot chart
ELUNA
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Excel Pivot Chart: Step 1
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Excel Pivot Chart: Step 2
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Excel Pivot Chart
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Excel Pivot Chart: Legend and Filters
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Excel Pivot Chart: filter applied
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Tableau
ELUNA
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Tableau
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Tableau: Create Tableau Public Account
Introductory Video
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Tableau: Resources. Download the application
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Tableau: Open data file
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Tableau: Worksheet configuration
Drop field here
Drop field here
Dro
p fie
ld h
ere
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Tableau: Rows and Columns Selected
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Tableau “Show Me” wizard
• Tableau’s “Show Me” wizard is programmed to recognize the available dimensions and measures, and to guide the user to select an option.
• You can reposition the floating Show Me widget, or dock it on the menu.
• Click on one of the thumbnails that represent a type of visualization. Tableau will fill-in the values.
Several variations generated by the Show Me wizard are shown on the following slides.
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Tableau: Basic pivot table
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Tableau: Color scaled pivot table
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Tableau: Stacked bar chart
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Tableau: Add a filter
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Tableau: Visualization hosted on Tableau Public
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Tableau: multiple value filter
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Tableau: Download
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Tableau: Share
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Tableau: Embedded on a web page
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Contact
Michael Cummings Library Systems Coordinator Scholarly Technology Group The George Washington University
[email protected] (202) 994-4806 (202) 507-2675 mobile
Slideshare: http://www.slideshare.net/cummingsdc
github: https://github.com/cummingsm
ELUNA: http://documents.el-una.org/view/creators/Cummings=3AMichael=3A=3A.html