DAP is a

statistics Statistics (from German language, German: ', "description of a State (polity), state, a country") is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. In applying statistics to a s ...

and

graphics Graphics () are visual images or designs on some surface, such as a wall, canvas, screen, paper, or stone, to inform, illustrate, or entertain. In contemporary usage, it includes a pictorial representation of the data, as in design and manufa ...

program based on the

C programming language C (''pronounced'' '' – like the letter c'') is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of ...

that performs data management, analysis, and C-style graphical visualization tasks without requiring complex syntax. Its name is an acronym for Data Analysis and Presentation. DAP was written to be a free replacement for SAS, but users are assumed to have a basic familiarity with the

in order to permit greater flexibility. It has been designed to be used on large data sets and is primarily used in statistical consulting practices. However, even with its clear benefits, DAP hasn't been updated since 2014 and hasn't seen widespread use when compared to other statistical analysis programs.

Features

DAP is a command line driven program. Below are various features that DAP can perform. DAP can compute

mean A mean is a quantity representing the "center" of a collection of numbers and is intermediate to the extreme values of the set of numbers. There are several kinds of means (or "measures of central tendency") in mathematics, especially in statist ...

s and

percentiles In statistics, a ''k''-th percentile, also known as percentile score or centile, is a score (e.g., a data point) a given percentage ''k'' of all scores in its frequency distribution exists ("exclusive" definition) or a score a given percentage ...

correlation In statistics, correlation or dependence is any statistical relationship, whether causal or not, between two random variables or bivariate data. Although in the broadest sense, "correlation" may indicate any type of association, in statistics ...

, & ANOVA from data sets. This includes Unbalanced as well as Crossed, Nested ANOVA. It can also be used to create

scatterplot A scatter plot, also called a scatterplot, scatter graph, scatter chart, scattergram, or scatter diagram, is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of dat ...

line graph In the mathematics, mathematical discipline of graph theory, the line graph of an undirected graph is another graph that represents the adjacencies between edge (graph theory), edges of . is constructed in the following way: for each edge i ...

s and

histograms A histogram is a visual representation of the distribution of quantitative data. To construct a histogram, the first step is to "bin" (or "bucket") the range of values— divide the entire range of values into a series of intervals—and then ...

of data. This can include split plots, treatment combinations, as well as

latin square Latin ( or ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally spoken by the Latins in Latium (now known as Lazio), the lower Tiber area around Rome, Italy. Through the expansion o ...

s. DAP can perform

linear regression In statistics, linear regression is a statistical model, model that estimates the relationship between a Scalar (mathematics), scalar response (dependent variable) and one or more explanatory variables (regressor or independent variable). A mode ...

and can utilize regressions to build

linear model In statistics, the term linear model refers to any model which assumes linearity in the system. The most common occurrence is in connection with regression models and the term is often taken as synonymous with linear regression model. However, t ...

s. In addition to linear regression, DAP can also perform

logistic regression In statistics, a logistic model (or logit model) is a statistical model that models the logit, log-odds of an event as a linear function (calculus), linear combination of one or more independent variables. In regression analysis, logistic regres ...

analysis as well. There's a variety of other analysis that DAP can do as well including building loglinear models as well as Logit models for linear-by-linear association. In terms of models, DAP can create mixed balanced and unbalanced models as well as random unbalanced models. It has been designed so as to cope with very large data sets; even when the size of the data exceeds the size of the computer's

memory Memory is the faculty of the mind by which data or information is encoded, stored, and retrieved when needed. It is the retention of information over time for the purpose of influencing future action. If past events could not be remembe ...

because the program processes files one line at a time rather than reading entire files into memory.

Applications

Industry Uses * Statistical Consulting Practices * Low-level Statistical Analysis

References

Sources

External links

*
administrative page
GNU Project software Free software programmed in C Free statistical software {{Science-software-stub

Features

Applications

See also

References

Sources

External links