SDA 3.5 Documentation for UPDATES
updates - Changes to SDA since Version 3.4
This is a summary of the differences between Version 3.5 and
Version 3.4 of SDA.
CHANGES TO ANALYSIS PROGRAMS
Precision-based Suppression of
The TABLES and MEANS programs can now suppress the output of a
particular percentage or mean, if it does not meet certain
criteria for precision.
The criteria for the desired minimum levels of precision are
specified by adding them to the
REGRESS and LOGIT
- The regression programs now compute standard errors
for complex samples. The method used is jackknife
repeated replication. In order to enable this option, the
stratum and/or cluster variables must be specified in the HARC
file for a dataset. For details see the SDA document on
Used by SDA 3.5 for Computing Standard Errors for Complex
- Multiple dummy variables for each value of a
numeric variable can now be created with a single
command. For details see the
online help file
for analysis programs.
- Confidence intervals can be requested (90%, 95%, or
- The variance/covariance matrix of the regression
coefficients can be requested.
- The list of independent variables can be
suppressed. If many consecutive analyses are run with
the same independent variables, the repition of that list of
variables may seem redundant. That list can now be suppressed by
New options have been added for displaying the crosstab output:
- The number of decimals shown in the percentages can now be
specified -- from 0 to 6 decimal places.
- The unweighted N’s for the percentages can be suppressed.
- The weighted N’s (if a weight is used) for the percentages
can be suppressed.
- The headings for the row and/or column totals can be
For more information on these new options, see the document with
Tables Installation Information.
was developed for ICPSR a few years ago and was not distributed
routinely. However, Quick Tables is now included in the standard
SDA distribution package.
There was a problem with the Chrome and the Safari browsers, due
to a bug in the WebKit library used by both of those browsers.
They would not re-submit a form for execution unless a key was
pressed on the form. (A mouse click to change a radio button or
check box was not sufficient.) In SDA 3.5 we’ve developed a
work-around for the bug in those browsers, so that Chrome and
Safari users will not encounter problems.
CSM, UC Berkeley
April 12, 2011