Collaborative Filtering on Skewed Datasets


 
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Old 05-22-2008
Collaborative Filtering on Skewed Datasets

HPL-2008-50 Collaborative Filtering on Skewed Datasets - Banerjee, Somnath; Ramanathan, Krishnan
Keyword(s): collaborative filtering, skewed dataset, pLSA
Abstract: Many real life datasets have skewed distributions of events when the probability of observing few events far exceeds the others. In this paper, we observed that in skewed datasets the state of the art collaborative filtering methods perform worse than a simple probabilistic model. Our test bench inc ...
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hdf_set_symlink(3)						  util/neo_hdf.h						hdf_set_symlink(3)

NAME
hdf_set_symlink - Set part of the tree to link to another SYNOPSIS
#include <util/neo_hdf.h> NEOERR *hdf_set_symlink (HDF *hdf, const char *src, const char *dest); ARGUMENTS
hdf -> the dataset node src -> the source node name dest -> the destination node name (from the top of the dataset, not relative names) DESCRIPTION
hdf_set_symlink creates a link between two sections of an HDF dataset. The link is "by name" hence the term "symlink". This means that the destination node does not need to exist. Any attempt to access the source node will cause the function to walk to the dest node, and then continue walking from there. Using symlinks can "hide" values in the dataset since you won't be able to access any children of the linked node directly, though dumps and other things which access the data structure directly will bypass the symlink. Use this feature sparingly as its likely to surprise you. RETURN VALUE
None SEE ALSO
hdf_set_symlink(3), hdf_get_valuef(3), compareFunc)(3), hdf_dump_str(3), hdf_get_int_value(3), hdf_read_string_ignore(3), hdf_copy(3), hdf_get_node(3), hdf_set_value(3), hdf_obj_child(3), hdf_read_string(3), hdf_set_buf(3), hdf_register_fileload(3), hdf_get_obj(3), hdf_get_attr(3), hdf_obj_top(3), hdf_dump_format(3), hdf_destroy(3), hdf_init(3), hdf_obj_value(3), hdf_write_string(3), hdf_set_val- uevf(3), hdf_sort_obj(3), hdf_write_file_atomic(3), hdf_obj_attr(3), hdf_set_valuef(3), hdf_get_copy(3), hdf_write_file(3), hdf_get_val- uevf(3), hdf_set_int_value(3), hdf_dump(3), hdf_get_value(3), hdf_set_copy(3), hdf_obj_next(3), hdf_search_path(3), hdf_obj_name(3), hdf_set_attr(3), hdf_get_child(3), hdf_remove_tree ClearSilver 12 July 2007 hdf_set_symlink(3)