X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=doc%2Fstatistics.texi;h=a4f03ca6dd52fcce3a1b6b8babd747c263a4633b;hb=36e519a81a4b2659596f9653f5eb10de2ffa7c2a;hp=6e8b5c67a41ed07093d8192aa9da0fe798135545;hpb=3d9f94e464bd3b760898914304d16cc9c3990f11;p=pspp

diff --git a/doc/statistics.texi b/doc/statistics.texi
index 6e8b5c67a4..a4f03ca6dd 100644
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -732,14 +732,17 @@ The default is @subcmd{LISTWISE}.
 @cindex bivariate logistic regression
 
 @display
-LOGISTIC REGRESSION [VARIABLES =] @var{dependent_var} WITH @var{var_list}
+LOGISTIC REGRESSION [VARIABLES =] @var{dependent_var} WITH @var{predictors}
+
+     [/CATEGORICAL = @var{categorical_predictors}]
 
      [@{/NOCONST | /ORIGIN | /NOORIGIN @}]
 
      [/PRINT = [SUMMARY] [DEFAULT] [CI(@var{confidence})] [ALL]]
 
      [/CRITERIA = [BCON(@var{min_delta})] [ITERATE(@var{max_interations})]
-                  [LCON(@var{min_likelihood_delta})] [EPS(@var{min_epsilon})]]
+                  [LCON(@var{min_likelihood_delta})] [EPS(@var{min_epsilon})]
+                  [CUT(@var{cut_point})]]
 
      [/MISSING = @{INCLUDE|EXCLUDE@}]
 @end display
@@ -763,14 +766,22 @@ Hence, the full model is
 + \dots
 + b_n {\bf x_n}
 }
+
+Predictor variables which are categorical in nature should be listed on the @subcmd{/CATEGORICAL} subcommand.
+Simple variables as well as interactions between variables may be listed here.
+
 If you want a model without the constant term @math{b_0}, use the keyword @subcmd{/ORIGIN}.
 @subcmd{/NOCONST} is a synonym for @subcmd{/ORIGIN}.
 
 An iterative Newton-Raphson procedure is used to fit the model.
-The @subcmd{/CRITERIA} subcommand is used to specify the stopping criteria of the procedure.
+The @subcmd{/CRITERIA} subcommand is used to specify the stopping criteria of the procedure,
+and other parameters.
+The value of @var{cut_point} is used in the classification table.  It is the 
+threshold above which predicted values are considered to be 1.  Values
+of @var{cut_point} must lie in the range [0,1].
 During iterations, if any one of the stopping criteria are satisfied, the procedure is
 considered complete.
-The criteria are:
+The stopping criteria are:
 @itemize
 @item The number of iterations exceeds @var{max_iterations}.  
       The default value of @var{max_iterations} is 20.
@@ -784,6 +795,7 @@ In other words, the probabilities are close to zero or one.
 The default value of @var{min_epsilon} is 0.00000001.
 @end itemize
 
+
 The @subcmd{PRINT} subcommand controls the display of optional statistics.
 Currently there is one such option, @subcmd{CI}, which indicates that the 
 confidence interval of the odds ratio should be displayed as well as its value.