# Percentile Ranks in Matlab

I have 2 vectors of raw values. I need to do a percentile rank correlation and an ordinal rank correlation between them in Matlab.

Vec1 = [25    28    29    29    31    32    33    33    33    35    37] ;


I'm using corr function in Matlab with type=Spearman for the ordinal part.

I'm confused about the percentile rank part. Until now I was using tiedranks*100/length and would feed the output to corr function with type=Pearson (courtesy of a forum answer). However, the correct way is at http://www.psychstat.missouristate.edu/introbook/sbk14m.htm.

Website Ranks    = [4.6  13.6  27.3  27.3  40.9  50    68.2  68.2  68.2  86.4  95.4] ;
TiedRanks*100/len= [9.09 18.18 31.81 31.81 45.45 54.54 72.72 72.72 72.72 90.90 100];


Please let me know which is correct? Can I use Matlab's prctile function here? Thanks.