using an analysis sample and a holdout sample in discriminant analysis

[Poba-Nzaou]

Dear All,
I would like to create discriminant functions with an analysis sample (subsample composed of 60% of my global sample) and use the functions to classify a holdout sample (subsample composed of 40% of my global sample). I need help for SPSS syntax.
Thanks in advance for your help.
Placide

[Art Kendall]

In the syntax window type "discriminant." Place your cursor on that text and key <f1> (aka <help>).

See the specifications for the classification phase.


create a new variable which is identical to your grouping variable.
create an additional value label for that new variable which says "ungrouped"

Do you want to consider 40 % of each original group as ungrouped or do you want to consider 40% of all cases as ungrouped.


transform the new variable so that the cases you want to be ungrouped have the appropriate value and value label.

[David Marso]

See /SELECT subcommand in DISCRIMINANT.
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Poba-Nzaou wrote

Dear All,
I would like to create discriminant functions with an analysis sample (subsample composed of 60% of my global sample) and use the functions to classify a holdout sample (subsample composed of 40% of my global sample). I need help for SPSS syntax.
Thanks in advance for your help.
Placide