Home > Data Services > Catalog . Restricted Data . Census . ACS

Search Data Services

Meta Search
search across all the following databases:

Data Catalog
Data and documentation

KnowledgeBase
Common questions and answers.

Resources
Entire collection of data resources.


Latest Data News

RSS Feed icon

A questionnaire change: politics or not?

Finding “war brides” in the ACS

Census Bureau is considering adding a new Middle East/North Africa ethnic category

Big Data Initiative at NIH-OBSSR

UM Now Has Access to IndiaStat

divide

Purpose: This program takes a data set as input and divides it into a maximum of 99 subfiles. Its main purpose is to allow one to write out a large data set from UNIX to a multi-volume external device.

To run, enter: divide a b c d

where

For example, to divide up the 1990 STF3C data into four subfiles enter:

divide 3c_dat 5000 19900 16200

The result will be a file 3c_dat.01 of 5000 records, file 3c_dat.02 of 5000 records, file 3c_dat.03 of 5000 records, and file 3c_dat.04 of 1200 records.

Notes:

  1. To run in the background, add an ampersand to the run statement:

    divide 3c_dat 5000 19900 16200 &

  2. If data are compressed, the data can be piped in from a decompression program. You will need to use the dividecomp version of the utility to do this.

    zcat /usr/pops/d3/stf/1990/3c/3c_dat.Z | dividecomp 5000 19900 16200 &