Data Using DECtape

D. Eugene Hokanson, Veterans Administration Hospital,

Seattle, Washington

These programs use DECtape for the storage of data files.

Once data has been stored on DECtape, the statistical or

calculation programs will operate on particular parts of it

selected by the user. All programs are conversant. They

ask questions regarding execution and accept answers via

the Teletype.

DATRIT is a program to write data on DECtape directly

from the ASR-33. Numerical data is stored on DECtape

in floating point format.

EDATA is a program to edit data files created on DECtape

by DATRIT.

SDT is a program to calculate Mean and Standard Deviation

from data files stored on DECtape.

FORT calculates an analysis of variance table similar to

DECUS No. 5/8-9 using data files stored on DECtape.

COVAR calculates the necessary values for an analysis of

covariance from data files stored on DECtape. The paired

input consists of matching files of x and y data.

LCOVAR is a semi-logarithmic version of COVAR. y values

are converted to log y before calculation so that each "Y"

in the output format means log y. This program is useful

for semi-logarithmic regression analysis.

TPAIR performs a paired T test on data files stored on DECtape.

The input consists of paired files x and y data.

BCALC enables the user to do calculations using data files

on DECtape as variables in the calculation, Results of

calculation are stored on DECtape. BCALC is a master

program for handling the data files. The user must supply a

floating point program, which is called by BCAlC as a

subroutine, for each specific calculation.

LCALC enables the user to do calculations from data stored

on DECtape using specific lines of a file as variables in the

calculation. The result of the calculation may be stored on

one line of the same file or a different file. LCALC is

similar to BCALC.

SUBS is a package of four subroutines used by most of these

programs. SUBS contains six pointers on page zero and

subroutines in the area from 4000 to 7577.

These subroutines are:

MESSAGE Type packed text

UNFlOAT Unfloat floating point numbers

RWTAPE Read and write DECtape

FPOINT Floating point output controller

FLEX is an extended version of Floating Point which lacks

the Output Controller. It is used to overlay the FPOINT

section of SUBS in the programs which use extended Floating

Point.