preprocessor

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preprocessor

[¦prē′prä‚ses·ər]
(computer science)
A program that converts data into a format suitable for computer processing.

preprocessor

(programming)
A program that transforms input data in some way before it is read by the main program. In the case of a compiler, the input is source code. The main advantage of using a preprocessor is that it is possible to change the specification of the input data without changing the main program. The separation can also help to make the system's overall behaviour easier to understand. The disadvantage is that performance may be reduced by the extra input and output performed between the two programs.

For example, the C preprocessor, cpp, handles textual macro substitution (it acts as a "macro preprocessor"), conditional compilation and inclusion of other files.

A preprocessor may be used to transform a program into a simpler language, e.g. to transform C++ into C.

preprocessor

Software that performs some preliminary processing on the input before it is processed by the main program. See preprocessing.
References in periodicals archive ?
Data Preprocessing in Web Usage Mining, International Conference on Artificial Intelligence and Embedded Systems (ICAIES'2012), Singapore.
The data preprocessing for each AVHRR scene involves radiometric calibration, atmospheric correction, geometric correction and cloud removal.
Different steps involved in data mining like data preprocessing, understanding of data formats and structure, modeling the data, choice of algorithm and assessing the results demand some level of understanding about the data format.
Each application covers the business background, and problems, data extraction and exploitation, data preprocessing, modeling, model evaluation, findings, and model deployment.
Data preprocessing methods are in such a way important that, in this work, a program was created especially designed to perform this research.
SAS' data preprocessing tools enable a thorough investigation of complex health care claims.
NASDAQ: PVSW), a global value leader in embeddable data management and data integration software, today announced the combined power and capabilities of Pervasive DataRush[TM], Pervasive Data Profiler[TM] and Pervasive Data Integrator[TM] are delivering lightning-fast claims data preprocessing for TC3 Health.