Home/ Questions/How to fix “requires numeric/complex matrix/vector arguments in r”?
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Tiago Dufour
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Asked: 2022-05-17T13:01:31+00:00 In:

How to fix “requires numeric/complex matrix/vector arguments in r”?

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I get the “requires numeric/complex matrix/ vector arguments in R” error as the title says. How can I fix it so the error goes away? Here is my detail:

ma=diag(3)+t(da)%*%da
V45 V46 V47 V48 V49 V50 V51 
 1 0.461727059 2.357732985 -1.536932071 -1.34425710 0.893541975 -0.0676913075 -0.86532231
 2 0.253022555 1.524473647 -0.588911138 -1.65207275 -0.072255170 -0.5212951533 -1.43686625
 3 0.824678362 1.497001189 0.335973892 -0.84027799 0.275289411 -0.2921928001 -0.16277595
 4 0.854530787 2.258305198 0.107346531 -1.69194014 -0.841572928 -1.1153931009 -1.939461341
 5 1.148286984 -0.232390389 -0.498465734 -0.45728816 0.352889082 0.9868844505 -0.68401129

When I operated it, I received the error text:

Error in t(da) %*% da : requires numeric/complex matrix/vector arguments

I appreciate any help from you.

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2 Answers

  1. Best Answer
    Expert

    The cause: Because a large number of device learning libraries use matrix multiplication, you can see a similar error if one or more of your inputs are of the class character while the algorithm expects numeric.

    Another reason: If you try to pass a data frame where a matrix needs to be.

    Solution: 

    You must convert the data.frame to a matrix in order for the matrix multiplication to work:

    t(da)%*%as.matrix(da)

    It produces a 7×7 matrix, which you can’t add to the 3×3 identity matrix you’re working with. The code shows something like:

    ma=diag(7)+t(da)%*%as.matrix(da)

     

    • 18

  2. This error can also be triggered if you try to pass a dataframe where a matrix should be.

    • 22

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