* This file is provided under the Creative Commons Attribution 3.0 license.
* You are free to share, copy, distribute, transmit, or adapt this work
* PROVIDED THAT you attribute the work to the authors listed below.
* For more information, please see the following web page:
* This file is a component of the Sleipnir library for functional genomics,
* authored by:
* Curtis Huttenhower (email@example.com)
* Mark Schroeder
* Maria D. Chikina
* Olga G. Troyanskaya (firstname.lastname@example.org, primary contact)
* If you use this library, the included executable tools, or any related
* code in your work, please cite the following publication:
* Curtis Huttenhower, Mark Schroeder, Maria D. Chikina, and
* Olga G. Troyanskaya.
* "The Sleipnir library for computational functional genomics"
* \page SeekMiner SeekMiner
* SeekMiner accepts a set of genes as query in order to perform a weighted compendium
* search for additional genes that are coexpressed with the query genes.
* SeekMiner finds and integrates relevant datasets by using one of the many dataset weighting
* algorithms, including the cross-validated query-coexpression weighting, the order statistics
* weighting, etc.
* These search algorithms are designed to be quick and efficient, and enable fast weight computations
* for thousands of microarray datasets.
* \section sec_usage Usage
* \subsection ssec_usage_basic Basic Usage
* SeekMiner -x <dset_platform_map> -i <gene_map> -q <query> -P <platform_dir> -p <prep_dir> -n <num_db>
* -d <db_dir> -Q <quant> -o <output_dir> -V <weight_method> -z <distance_measure> -m [-D <search_dset>]
* This performs the coexpression search for a list of queries,
* and outputs the gene-ranking and the dataset weights in the \c output_dir.
* \subsubsection sec_weight Weighting Datasets
* SeekMiner supports the following weighting methods (\c -V):
* \li Query cross-validated weighting (\c CV, default), where we iteratively use a subset of the
* query to construct a search instance to retrieve the remaining query genes. The sum of the score of the
* cross-validations forms the dataset weight.
* \li Equal weighting (\c EQUAL), where all datasets are weighted equally.
* \li Order statistics integration (\c ORDER_STAT), which is outlined in Adler et al (2009).
* This method computes a P-value statistics by comparing the rank of correlation across datasets to the
* ranks that would have been generated a null distribution (where correlations are assumed to be
* randomly scattered and all ranks are equally likely).
* The use of \c -V \c CV is highly recommended.
* \subsubsection sec_distance Distance Measure and Transformations
* Users can select between Pearson correlations (\c -z \c pearson) or z-scores of Pearson (\c -z \c z_score).
* Z-scores is the recommended choice because it normalizes the correlation distribution to a standard normal
* distribution that can be compared across datasets. In addition, SeekMiner provides the following
* transformations on z-scores to further allow boosting of signals:
* \li \c --score_cutoff. Cuts off z-scores at a specified value. Z-scores that fall below the cut-off are assigned zero.
* \li \c --norm_subavg. Subtracts each gene's average z-score. This prevents highly connected genes from being constantly returned with top ranks in the ranking.
* \li \c --norm_subavg_plat. Normalizes z-score by subtracting the average across the platform and dividing by its standard deviation.
* This is designed to handle potential platform biases on the z-scores.
* \li \c --square_z. Squaring the z-score. This is another way to boost the highly correlated gene-pairs.
* It is highly recommended to enable \c --norm_subavg.
* \subsubsection sec_search Search Datasets
* Users may also define the datasets that they wish to use for integrations in a query-specific way, using \c -D argument.
* If this argument is absent, all datasets in the compendium will be integrated.
* If \c -D is used, the search datasets must be selected from the available
* datasets defined in \c dset_platform_map.
* \subsubsection sec_output Output
* The output files are divided according to queries.
* Starting with the first query (with a file name 0), its final results
* will consist of three files: \c 0.query, \c 0.dweight, \c 0.gscore.
* \li The file base name (0) indicates the query index in the list.
* \li The \c 0.query stores the space-delimited query gene-set in text.
* \li The \c 0.dweight stores the weightings of datasets as a binary one-dimensional float vector
* (see \ref SeekEvaluator for displaying a DWEIGHT extension file).
* \li The \c 0.gscore stores the gene scores as a binary one-dimensional float vector
* (see \ref SeekEvaluator for displaying a GSCORE extension file).
* \subsubsection sec_files Query-independent search setting files and directories
* \c -x \c dset_platform_map
* Tab-delimited text file containing two columns, the dataset name,
* and the corresponding platform name. Below is a few sample lines:
* GSE15913.GPL570.pcl GPL570
* GSE16122.GPL2005.pcl GPL2005
* GSE16797.GPL570.pcl GPL570
* GSE16836.GPL570.pcl GPL570
* GSE17351.GPL570.pcl GPL570
* GSE17537.GPL570.pcl GPL570
* Note that although the dataset name looks like a file name, it does not
* need to be a valid file name, as long as it properly and uniquely describes
* the dataset. Here, the dataset is uniquely identified by a GSE ID and a GPL ID
* combination. In addition, the ordering of the datasets in this file must match
* the order of the datasets in the CDatabaselet (ie DB files).
* \c -i \c gene_map
* Tab-delimited gene-map file. Maps the genes to an ID between 0 to N where N is
* the genome size. Example:
* 1 1
* 2 10
* 3 100
* 4 1000
* 5 10000
* 6 100008589
* 7 100009676
* 8 10001
* 9 10002
* 10 10003
* 11 100033413
* 12 100033414
* The ordering of the genes in this file must match the order of genes
* in the CDatabaselets (DB files).
* \c -q \c query
* The file can contain multiple queries that are listed one query per line.
* The genes in each query are separated by spaces. Example:
* 10003 10002 10001
* 634 6265
* The names of the genes must be selected from the genes in the \c gene_map.
* The maximum length of the query depends on the amount of available memory in the system.
* It is recommended to keep each query less than 100 genes.
* \c -D \c search_dset
* This file defines the list of datasets to be used for the query coexpression search.
* The file is defined in a query specific way.
* An example is provided below:
* GSE15913.GPL570.pcl GSE16122.GPL2005.pcl GSE16836.GPL570.pcl ...
* GSE14933.GPL570.pcl GSE15162.GPL2005.pcl GSE15566.GPL570.pcl ...
* where each line, corresponding to a query, is a space-separated dataset list for the query.
* The dataset names must be selected from the file \c dset_platform_map.
* \c -P \c platform_dir
* Directory that contains the following 3 files:
* \li \c all_platforms.gplatavg. the platform average z-scores
* \li \c all_platforms.gplatstdev. the platform z-score standard deviation
* \li \c all_platforms.gplatorder. the order of platforms
* These binary files are generated by \ref SeekPrep. The specification of this directory is
* necessary for \c --norm_subavg_plat.
* \c -p \c prep_dir
* Directory that contains the gene presence files and the gene average files:
* \li Gene presence (GPRES files): indicates the presence/absence of genes in a dataset
* \li Gene average (GAVG files): indicates the average z-score of each gene in a dataset
* There should be one pair of these files for <b>every</b> dataset that is specified
* in \c dset_platform_map. Generated by \ref SeekPrep.
* \c -d \c db_dir
* Directory that contains the CDatabase (all of the DB files).
* \c -Q \c quant
* The \c quant file specifies how the z-scores are binned. This is necessary for properly reading
* the z-scores, because the z-scores are stored as binned values on disk. This quant file is used
* to convert them back to z-scores when they are read from disk.
* Currently, the maximum number of bins supported is 255.
* A snapshot of the \c quant file is below:
* -5.00 -4.96 -4.92 -4.88 -4.84 -4.80 -4.76 -4.72 -4.68 -4.64 -4.60 -4.56 -4.52 ...
* The bin boundaries are separated by spaces.
* \c -o \c output_dir
* Directory that will contain the search results.
* \c -u \c sinfo_dir
* Directory that contains the SINFO files, which list a dataset's average z-score between all pairs of genes
* and the standard deviation. If this directory is provided, there should be one SINFO file for <b>
* every</b> dataset in \c dset_platform_map. Generated by \ref SeekPrep.
* \subsection ssec_usage_detailed Detailed Usage
* \include SeekMiner/SeekMiner.ggo