grouping, aggregating data in MatLab.

Hello everyone, I have a large data set/ Matrix that has about 15000 rows.I need to aggregate this data set by a unique variable from one of columns in this matrix. so basically the output matrix will be much smaller in rows count. Example: fips_blkgrp FIPS D E F G H I 4.712e+11 47123 -11.584346 -10.07945 -7.1780256 -2.6858628 3.3706902 10.312981 4.712e+11 47123 -12.00541 -9.8563267 -6.4562942 -3.1759443 -.94757033 .21481607 4.712e+11 47123 -20.057433 -17.800008 -13.351936 -7.2696727 -.95978707 4.0782249 4.712e+11 47123 -12.999934 -11.585924 -8.936135 -4.7638609 1.2660365 9.0080125 4.712e+11 47123 -21.443385 -18.609881 -13.299678 -6.7836897 -1.0418698 2.8018057 4.712e+11 47123 -7.1070823 -5.4806812 -3.0137752 -.75519104 .70738883 1.4407552 4.712e+11 47123 -15.422121 -13.187263 -8.9353662 -3.3867106 2.2245624 6.8419238 4.712e+11 47123 -17.84071 -15.823746 -11.649713 -5.2884233 2.627514 10.550759 4.712e+11 47123 -22.952984 -20.867834 -16.470138 -9.6939436 -1.3906679 6.5917377 4.712e+11 47123 -19.435712 -16.360458 -11.100838 -5.5329737 -1.4896058 .63286027 4.712e+11 47123 -26.831252 -24.242572 -19.129545 -12.30135 -5.754132 -1.4678411 4.712e+11 47123 -26.148467 -22.037834 -14.481806 -5.4051246 2.4308043 7.5238108 4.712e+11 47123 -17.307711 -15.366532 -11.330608 -5.1586246 2.4848583 10.145997 4.712e+11 47123 -24.434183 -21.05872 -14.928325 -7.9606946 -2.6907324 -.00157565 4.712e+11 47123 -17.709645 -14.766697 -9.7966051 -4.6341523 -.98012277 .884774 I need to aggregate this data set by "fips_blkgrp" Anyone has any suggestions! Please help

[jgg]

Did this answer not solve your problem: http://www.mathworks.com/matlabcentral/answers/156577-how-to-sum-group-values-in-a-matrix-based-on-their-index-values-in-first-column