,period 
<A HREF = "ical_d.m       ">ical_d         </A>: An example of using ical()                               
<A HREF = "indexcat.m     ">indexcat       </A>: Extract indices for y being equal to val if val is a scaler
<A HREF = "indicator.m    ">indicator      </A>: converts the matrix x to indicator variables
<A HREF = "invccorr.m     ">invccorr       </A>: converts matrix to correlation form with
<A HREF = "invpd.m        ">invpd          </A>: A dummy function to mimic Gauss invpd
<A HREF = "invpd