# Problem on Matrix multiplication

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## Problem on Matrix multiplication

 Dear all r-users, I am getting a big problem with matrix multiplication suppose I have, > weight   Weight 1       1067640 2       8871500 3      42948778 4     127583735 5      22000000 6      44000000 7      56850000 8      23805662 and, > s             a          b          c          d          e f          g          h a   402493.18 -133931.62   461483.3  -94042.86   674493.8 -1493713.2  - 714081.5 -1320551.6 b  -133931.62  192766.63  -414674.4  -36700.74  -276595.3   798034.6 382661.6   883478.4 c   461483.25 -414674.43  1618660.4  660949.18   988526.5 -2795048.7 - 1483334.1 -1761234.9 d   -94042.86  -36700.74   660949.2 1053310.43  -300291.4   -98814.9  - 263716.7  1130451.3 e   674493.80 -276595.33   988526.5 -300291.35  3090869.8 -3017747.3 - 1766040.6 -2295605.0 f -1493713.19  798034.60 -2795048.7  -98814.90 -3017747.3 10558734.1 4415620.8  6200897.7 g  -714081.51  382661.62 -1483334.1 -263716.67 -1766040.6  4415620.8 2593947.5  2341455.0 h -1320551.58  883478.39 -1761234.9 1130451.26 -2295605.0  6200897.7 2341455.0  7756557.3 But when I want to get [transpose(weight)][s][weight] using following syntax, t(weight)%*%s%*%weight I got error: Error in t(weight) %*% s %*% weight : requires numeric matrix/vector arguments Can anyone please tell me that where my error is? Thanks and regards,         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide! http://www.R-project.org/posting-guide.html