html/data_stats_docs.php

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 114 <div id="Layer1"
 115  style="position: absolute; left: 335px; top: 42px; width: 388px; height: 43px; z-index: 1; font-size: x-small;">
 116 <div class="style1" align="right">Data Statistics<br>
 117 </div>
 118 </div>
 119 <div id="Layer2"
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 121 <div align="justify">
 122 <h3 class="heading1">Synopsis</h3>
 123 <span class="style2">data_stats [ -h | -? ] [ -help ]<br>
 124 [ -columns='string' ]<br>
 125 [ -ignore_columns='string' ]<br>
 126 [ -debug='integer' ]<br>
 127 [ -debug_package='string' ]<br>
 128 [ -debug_subroutine='string' ]<br>
 129   outputfile(s) </span><br>
 130
 131 <h3 class="heading1">Description</h3>
 132
 133 <p>data_stats calculates and prints simple statistics for data
 134 files. Simple stastics are max, min, mean, median, range and standard
 135 deviation for each column. </p>
 136
 137 <h3 class="heading1">Options</h3>
 138 <p>
 139     The options are given here in their long form. Any option may be
 140     abbreviated to any nonconflicting prefix. The -threads option may
 141     be abbreviated to -t(or even -thr) but -debug may not be
 142     abbreviated to -d because it conflicts with -debug_packages and
 143     -debug_subroutines.
 144 <p>
 145     The following options are valid:
 146 <p class="style2">
 147     -h | -?
 148 <p>
 149     Print a list of options.
 150 <p><p class="style2">
 151
 152     -columns='strings'
 153 <p>
 154     By default data_stats prints statistics for all columns of the
 155     data set. But if you give a comma separated list of column headers
 156     or column numbers with the -columns option, then data_stats will
 157     print statistics for those columns only.
 158 <p>
 159 <p class="style2">
 160     -ignore_columns='strings'
 161 <p>
 162     ignore_columns work the oposite way of -columns, it lets you
 163     select column headers or column numbers for which data_stats
 164     should not print statistcs. It also takes a comma separated list.
 165 <p class="style2">
 166     -help
 167 <p>
 168     Print this, longer, help message.
 169 <p>
 170 <p class="style2">
 171     -debug='integer'
 172 <p>
 173     Default value is: 0
 174 <p>
 175     This is mainly for developers who whish to debug PsN. By default
 176     'integer' is zero but you can try setting it to '1' and you might
 177     get some helpfull warnings. If you run in to problems that require
 178     support, you might be told to crank this number up and send the
 179     output to us.
 180 <p>
 181 <p class="style2">
 182     -debug_package='string'
 183 <p>
 184     Default value is: empty string
 185 <p>
 186     If use together with '-debug' it is possible to choose which part
 187     of PsN you want to see debug messages from. Again this is mostly
 188     for developers.
 189 <p>
 190 <p class="style2">
 191     -debug_subroutine='string'
 192 <p>
 193     Default value is: empty string
 194 <p>
 195     With this option it is possible to specify, with even finer
 196     granularity, which part of PsN you want to see debug messages
 197     from. This is definitly only for developers.
 198
 199 <h3 class="heading1">Output</h3>
 200
 201 The output of data_stats is ordered in rows and columns. For each
 202 calculated statistics there is a row, and for each data set column,
 203 there is a column.
 204 <p>
 205 So by running this command:
 206 <p>
 207 <span class="style2">$ data_stats file.dta --columns=WGT,TIME</span><p>
 208 You get this table.
 209 <pre>
 210         WGT     TIME
 211 Min     0       0
 212 Max     3       389
 213 Mean    1       54
 214 Median  1       59
 215 Range   3       389
 216 SD      0       25
 217 </pre>
 218 <h3 class="heading1">Examples</h3>
 219 Examples:
 220 <p>
 221 Calculate statistics for all columns in file.dta
 222 <p>
 223 <span class="style2">$ data_stats file.dta</span>
 224 <p>
 225 Calculate statistics for all columns except WGT and AGE.
 226 <p>
 227 <span class="style2">$ data_stats --ignore_columns=WGT,AGE</span>
 228 <p>
 229 Calculate statistics for WGT and AGE only
 230 <p>
 231 <span class="style2">$ data_stats --columns=WGT,AGE</span>
 232 <p>
 233 </div>
 234 <p align="justify">&nbsp;</p>
 235 </div>
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