Difference between revisions of "Visualization"
Jump to navigation
Jump to search
| Line 23: | Line 23: | ||
==== Data Types ==== | ==== Data Types ==== | ||
* Nominal (labels, names) e.g. fruits: apples, oranges. | * Nominal (labels, names) e.g. fruits: apples, oranges. | ||
| + | *; Operations: =, != | ||
* Ordinal (ordered): e.g. quality of meat: Grade A, AA. | * Ordinal (ordered): e.g. quality of meat: Grade A, AA. | ||
| + | *; Operations: =, !=, <, >, <=, >= | ||
* Quantitative | * Quantitative | ||
** Interval (location of zero arbitrary): e.g. date, location | ** Interval (location of zero arbitrary): e.g. date, location | ||
| − | *** Like a geometric point, cannot compare directly | + | *** Like a geometric point, cannot compare directly. |
| − | *** Only differences (i.e. intervals) may be compared | + | *** Only differences (i.e. intervals) may be compared. |
| + | **; Operations: =, !=, <, >, <=, >=, - (can measure distances or spans) | ||
** Ratio (zero fixed): physical measurement e.g. length, mass. | ** Ratio (zero fixed): physical measurement e.g. length, mass. | ||
| − | *** Counts and amounts | + | *** Counts and amounts. |
*** Like a geometric vector, origin is meaningful. | *** Like a geometric vector, origin is meaningful. | ||
| + | **; Operations: =, !=, <, >, <=, >=, -, / (can measure ratios or proportions) | ||
Revision as of 21:23, 13 November 2013
Goals
- Effective communication of information
- Clarity
- Integrity
- Stimulate viewer engagement
Data Visualization
Three categories:
- Information Visualization
- Scientific Visualization
- Visual Analytics
The human visual system is the highest bandwidth channel to the human brain.
Graphs Reveal Data that Statistics May Not
e.g. Anscombe's Quartet (four data sets with the identical linear model but looks very different in visualization)
Data Visualization Process
- Classify data types
- Determine which visual attributes represent data types most effectively
Data Types
- Nominal (labels, names) e.g. fruits: apples, oranges.
- Operations
- =, !=
- Ordinal (ordered): e.g. quality of meat: Grade A, AA.
- Operations
- =, !=, <, >, <=, >=
- Quantitative
- Interval (location of zero arbitrary): e.g. date, location
- Like a geometric point, cannot compare directly.
- Only differences (i.e. intervals) may be compared.
- Operations
- =, !=, <, >, <=, >=, - (can measure distances or spans)
- Ratio (zero fixed): physical measurement e.g. length, mass.
- Counts and amounts.
- Like a geometric vector, origin is meaningful.
- Operations
- =, !=, <, >, <=, >=, -, / (can measure ratios or proportions)
- Interval (location of zero arbitrary): e.g. date, location