casereader: New function casereader_select().

[pspp-builds.git] / src / data / casereader.h

diff --git a/src/data/casereader.h b/src/data/casereader.h
index 62dc4e9176a0798f03222802b6dfb2d82d81bd46..a78afaeb27096974107ff1b17409e43318929e37 100644 (file)
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -129,6 +129,10 @@ casereader_translate_stateless (struct casereader *,
 struct casereader *casereader_project (struct casereader *,
                                        const struct subcase *);
 struct casereader *casereader_project_1 (struct casereader *, int column);
+struct casereader *casereader_select (struct casereader *,
+                                      casenumber first, casenumber last,
+                                      casenumber by);
+
 /* A function which creates a numberic value from an existing case */
 typedef double new_value_func (const struct ccase *, casenumber, void *);