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 116 <div class="style1" align="right">single_valued_columns<br>
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 122 <h3 class="heading1">Synopsis</h3>
 123 <p class="style2">$ single_valued_columns.pl <br>
 124  --data='filename'<br>
 125  --idcolumn='column_number'<br>
 126  --subset_name='single_value_filename'<br>
 127  --remainder_name='remaining_data_filename'<br>
 128  [-do_not_test_columns='2,3,5..7']
 129 </p>
 130 <h3 class="heading1">Description</h3>
 131 <p>The single_valued_columns utility is a Perl script for identification of columns in the data set that contain only one
 132   value per individual, e.g. sex. The utility creates two new data files: one containing the
 133   columns that are single valued and one containing the rest of the data. Both data sets will include the ID column. In the single valued data set the ID column number will be 1.</p>
 134 <h3 class="heading1">Options</h3>
 135 <p><span class="style2">--data='filename'</span></p>
 136 <p>Specify the name of the original data set through the <span class="style2">-data</span> option.</p>
 137 <p><span class="style2">--idcolumn='column_number'</span></p>
 138 <p>The utility needs to know which column that contains the ID number. This is specified through the <span class="style2">-idcolumn</span> option. </p>
 139 <p><span class="style2">--subset_name='single_value_filename'</span></p>
 140 <p>Specify the name of the new single-value-per-individual data set through the <span class="style2">-subset_name</span> option. </p>
 141 <p><span class="style2">--remainder_name='remaining_data_filename'</span></p>
 142 <p>The part of the data that is not single valued per individual will be written to the file specified by the <span class="style2">-remainder_name</span> option. </p>
 143 <p><span class="style2">      [-do_not_test_columns='2,3,5..7']</span></p>
 144 <p>If you need to keep some columns in the remaining data set,  the  numbers of these columns should be specified through the <span class="style2">-do_not_test_columns</span> option. </p>
 145 <h3 class="heading1">Output</h3>
 146 <p>The single_valued_columns utility creates two new data files: one containing the columns that are single valued and one containing the rest of the data.</p>
 147 </div>
 148 <h3 class="heading1">Example</h3>
 149 <p class="style2">
 150   $ single_valued_columns.pl --data=pheno.dta --idc=1 --sub=mysub.dta<br>
 151   --rem=myrem.dta --do_not='2,3'
 152 </p>
 153 <p align="justify">&nbsp;</p>
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