ata files</li></ul>
<b>SPECIAL</b><ul>
<li><b><a href='%pathto:special.vl_ddgaussian;'>VL_DDGAUSSIAN</a></b> Second derivative of Gaussian density</li><li><b><a href='%pathto:special.vl_dgaussian;'>VL_DGAUSSIAN</a></b> Derivative of Gaussian density</li><li><b><a href='%pathto:special.vl_dsigmoid;'>VL_DSIGMOID</a></b> Derivative of vl_sigmoid function</li><li><b><a href='%pathto:special.vl_gaussian;'>VL_GAUSSIAN</a></b> Standard Gaussian density</li><li><b><a href='%pathto:special.vl_rcos;'>VL_RCOS</a></b