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Related Concept Videos

Pie Chart01:04

Pie Chart

A pie chart (or a pie graph) is a circular graphical chart or a pictorial representation of categorical data. It is divided into slices of pie each indicating numerical proportions. It is also used to show the relative sizes of data in a single chart.
In a pie chart, the central angle, the arc length of each slice, and the area are directly proportional to the quantity or percentage it represents. Some real-world examples that can be depicted using pie charts include marks obtained by students...
Review and Preview01:13

Review and Preview

Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...
Bar Graph01:07

Bar Graph

A bar graph is also called a bar chart and consists of bars that are separated from each other. It either uses horizontal or vertical bars to show comparisons among categories. The bars can be rectangles, or they can be rectangular boxes (used in three-dimensional plots). One axis of the graph represents the specific categories being compared, and the other axis shows a discrete value. In this graph, the length of the bar for each category is proportional to the number or percent of individuals...
pV-Diagrams01:18

pV-Diagrams

The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
Velocity and Position by Graphical Method01:34

Velocity and Position by Graphical Method

Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to calculate...
Multiple Bar Graph01:07

Multiple Bar Graph

As the name suggests, a multiple bar graph is the same as a bar graph but has multiple bars to depict relationships between different data values. One can include as many parameters as possible. However, each parameter must have the same unit of measurement.
Each bar or column in the multiple bar graph represents a data value. These graphs are used primarily in interrelating two or more sets of data. The categories of different kinds of data are listed along the horizontal or x-axis, whereas...

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Facilitating the Analysis of Immunological Data with Visual Analytic Techniques
10:58

Facilitating the Analysis of Immunological Data with Visual Analytic Techniques

Published on: January 2, 2011

How information visualization novices construct visualizations.

Lars Grammel1, Melanie Tory, Margaret-Anne Storey

  • 1University of Victoria. lars.grammel@gmail.com

IEEE Transactions on Visualization and Computer Graphics
|October 27, 2010
PubMed
Summary
This summary is machine-generated.

Information visualization novices struggle with creating charts for data exploration. This study identified key challenges in selecting data, choosing templates, and mapping visuals, suggesting a need for better tools to aid novices.

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Area of Science:

  • Information Visualization
  • Human-Computer Interaction
  • Data Science

Background:

  • Novices face significant challenges in rapidly constructing effective visualizations for exploratory data analysis.
  • Existing visualization tools may not adequately support the iterative and cognitive processes involved in novice data exploration.

Purpose of the Study:

  • To investigate the barriers information visualization novices encounter during exploratory data analysis.
  • To understand how novices specify visualization requirements and construct visualizations.
  • To inform the design of improved visualization tools for novice users.

Main Methods:

  • An exploratory laboratory study was conducted with information visualization novices.
  • Participants explored fictitious sales data by communicating visualization specifications to a human mediator.
  • Observations focused on the iterative visualization construction process, including data attribute selection, visual template selection, and visual mapping specification.

Main Results:

  • Three core activities were identified: data attribute selection, visual template selection, and visual mapping specification.
  • Major barriers included translating questions into data attributes, designing visual mappings, and interpreting visualizations.
  • Novices commonly used partial specifications, simple heuristics, and preferred familiar chart types (bar, line, pie).

Conclusions:

  • Abstract models were developed to describe novice barriers in data exploration and their thought processes for visualization specifications.
  • Findings highlight the need for tools that suggest visualizations, support iterative refinement, provide explanations, and integrate with visual analytics workflows.