-Time-stamp: <2004-03-05 15:22:29 blp>
+Time-stamp: <2004-04-24 22:23:04 blp>
+
+What Ben's working on now.
+--------------------------
+
+Update q2c input format description.
+
+Rewrite output subsystem, break into multiple processes.
+
+CROSSTABS needs to be re-examined.
+
+RANK, which is needed for the Wilcoxon signed-rank statistic, Mann-Whitney U,
+Kruskal-Wallis on NPAR TESTS and for Spearman and the Johnkheere trend test (in
+other procedures).
TODO
----
-In debug mode hash table code should verify that collisions are reasonably low.
+Add compression to casefiles.
+
+Expressions need to be able to abbreviate function names. XDATE.QUARTER
+abbreviates to XDA.QUA, etc.
-Use posix_fadvise(POSIX_FADV_SEQUENTIAL) where available.
+The expression tests need tests for XDATE and a few others, see
+tests/xforms/expressions.sh comments for details.
-random.c should not know about set_seed.
+Expressions need random distribution functions.
+
+There needs to be another layer onto the lexer, which should probably be
+entirely rewritten anyway. The lexer needs to read entire *commands* at a
+time, not just a *line* at a time. It also needs to support arbitrary putback,
+probably by just backing up the "current position" in the command buffer.
+
+Scratch variables should not be available for use following TEMPORARY.
+
+Details of N OF CASES, SAMPLE, FILTER, PROCESS IF, TEMPORARY, etc., need to be
+checked against the documentation. See notes on these at end of file for a
+start.
+
+Check our results against the NIST StRD benchmark results at
+strd.itl.nist.gov/div898/strd
+
+In debug mode hash table code should verify that collisions are reasonably low.
Use AFM files instead of Groff font files, and include AFMs for our default
fonts with the distribution.
Fix som_columns().
-There needs to be another layer onto the lexer, which should probably be
-entirely rewritten anyway. The lexer needs to read entire *commands* at a
-time, not just a *line* at a time. This would vastly simplify the
-(yet-to-be-implemented) logging mechanism and other stuff as well.
-
Has glob.c been pared down enough?
Improve interactivity of output by allowing a `commit' function for a page.
From Zvi Grauer <z.grauer@csuohio.edu> and <zvi@mail.ohio.net>:
1. design of experiments software, specifically Factorial, response surface
- methodology and mixrture design.
+ methodology and mixrture design.
These would be EXTREMELY USEFUL for chemists, engineeris, and anyone
involved in the production of chemicals or formulations.
- 2. Multidimensional Scaling analysis (for market analysis) -
+ 2. Multidimensional Scaling analysis (for market analysis) -
3. Preference mapping software for market analysis
OTOH, if the /TABLE is too large, then do it the old way, complaining if either
file is not sorted on key.
+----------------------------------------------------------------------
+Statistical procedures:
+
+For each case we read from the input program:
+
+1. Execute permanent transformations. If these drop the case, stop.
+2. N OF CASES. If we have already written N cases, stop.
+3. Write case to replacement active file.
+4. Execute temporary transformations. If these drop the case, stop.
+5. Post-TEMPORARY N OF CASES. If we have already analyzed N cases, stop.
+6. FILTER, PROCESS IF. If these drop the case, stop.
+7. Pass case to procedure.
+
+Ugly cases:
+
+LAG records cases in step 3.
+
+AGGREGATE: When output goes to an external file, this is just an ordinary
+procedure. When output goes to the active file, step 3 should be skipped,
+because AGGREGATE creates its own case sink and writes to it in step 7. Also,
+TEMPORARY has no effect and we just cancel it. Regardless of direction of
+output, we should not implement AGGREGATE through a transformation because that
+will fail to honor FILTER, PROCESS IF, N OF CASES.
+
+ADD FILES: Essentially an input program. It silently cancels unclosed LOOPs
+and DO IFs. If the active file is used for input, then runs EXECUTE (if there
+are any transformations) and then steals vfm_source and encapsulates it. If
+the active file is not used for input, then it cancels all the transformations
+and deletes the original active file.
+
+CASESTOVARS: ???
+
+FLIP:
+
+MATCH FILES: Similar to AGGREGATE. This is a procedure. When the active file
+is used for input, it reads the active file; otherwise, it just cancels all the
+transformations and deletes the original active file. Step 3 should be
+skipped, because MATCH FILES creates its own case sink and writes to it in step
+7. TEMPORARY is not allowed.
+
+MODIFY VARS:
+
+REPEATING DATA:
+
+SORT CASES:
+
+UPDATE: same as ADD FILES.
+
+VARSTOCASES: ???
+----------------------------------------------------------------------
+N OF CASES
+
+ * Before TEMPORARY, limits number of cases sent to the sink.
+
+ * After TEMPORARY, limits number of cases sent to the procedure.
+
+ * Without TEMPORARY, those are the same cases, so it limits both.
+
+SAMPLE
+
+ * Sample is just a transformation. It has no special properties.
+
+FILTER
+
+ * Always selects cases sent to the procedure.
+
+ * No effect on cases sent to sink.
+
+ * Before TEMPORARY, selection is permanent. After TEMPORARY,
+ selection stops after a procedure.
+
+PROCESS IF
+
+ * Always selects cases sent to the procedure.
+
+ * No effect on cases sent to sink.
+
+ * Always stops after a procedure.
+
+SPLIT FILE
+
+ * Ignored by AGGREGATE. Used when procedures write matrices.
+
+ * Always applies to the procedure.
+
+ * Before TEMPORARY, splitting is permanent. After TEMPORARY,
+ splitting stops after a procedure.
+
+TEMPORARY
+
+ * TEMPORARY has no effect on AGGREGATE when output goes to the active file.
+
+ * SORT CASES, ADD FILES, RENAME VARIABLES, CASESTOVARS, VARSTOCASES,
+ COMPUTE with a lag function cannot be used after TEMPORARY.
+
+ * Cannot be used in DO IF...END IF or LOOP...END LOOP.
+
+ * FLIP ignores TEMPORARY. All transformations become permanent.
+
+ * MATCH FILES and UPDATE cannot be used after TEMPORARY if active
+ file is an input source.
+
+ * RENAME VARIABLES is invalid after TEMPORARY.
+
+ * WEIGHT, SPLIT FILE, N OF CASES, FILTER, PROCESS IF apply only to
+ the next procedure when used after TEMPORARY.
+
+WEIGHT
+
+ * Always applies to the procedure.
+
+ * Before TEMPORARY, weighting is permanent. After TEMPORARY,
+ weighting stops after a procedure.
+
+
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