[R] Creating the mean using algebra matrix

[Timothy Bates]

To do matrix multiplication: m x n, the Rows and columns of  m must be equal to the columns and rows of n, respectively. 


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On 11 Oct 2011, at 06:45 PM, flokke <ingaschwabe at gmail.com> wrote:

> Dear all, 
> I wanted to create the mean using a algebra matrix. 
> so I tried this one: 
> 
>> meanAnimals <- new3%*%factorial
> 
> (Calculates the matrix multiplication of the new3 * factorial).
> 
> But I get the following error message: 
> 
> Error in new3 %*% factorial : non-conformable arguments
> 
> These are my matrices: 
> 
> 
>> new3
>           [,1]   [,2]
> [1,]     1.350    8.1
> [2,]   465.000  423.0
> [3,]    36.330  119.5
> [4,]    27.660  115.0
> [5,]     1.040    5.5
> [6,] 11700.000   50.0
> [7,]  2547.000 4603.0
> [8,]   187.100  419.0
> [9,]   521.000  655.0
> [10,]    10.000  115.0
> [11,]     3.300   25.6
> [12,]   529.000  680.0
> [13,]   207.000  406.0
> [14,]    62.000 1320.0
> [15,]  6654.000 5712.0
> [16,]  9400.000   70.0
> [17,]     6.800  179.0
> [18,]    35.000   56.0
> [19,]     0.120    1.0
> [20,]     0.023    0.4
> [21,]     2.500   12.1
> [22,]    55.500  175.0
> [23,]   100.000  157.0
> [24,]    52.160  440.0
> [25,]     0.280    1.9
> [26,] 87000.000  154.5
> [27,]     0.122    3.0
> [28,]   192.000  180.0
>> factorial
>     [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13]
> [,14] [,15] [,16] [,17]
> [1,]    1    1    1    1    1    1    1    1    1     1     1     1     1    
> 1     1     1     1
>     [,18] [,19] [,20] [,21] [,22] [,23] [,24] [,25] [,26] [,27] [,28]
> [1,]     1     1     1     1     1     1     1     1     1     1     1
> 
> 
> Can anyone help me out of this?
> 
> Cheers, maria
> 
> --
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> 
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