矩阵表达式导致错误“需要数字/复杂矩阵/向量参数"? [英] Matrix expression causes error "requires numeric/complex matrix/vector arguments"?
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问题描述
ma=diag(3)+t(da)%*%da
上面的R代码,报错信息如下:
R Code above, error message as follows:
Error in t(da) %*% da : requires numeric/complex matrix/vector arguments
da
是一个矩阵,如下所示:
da
is a matrix, looks as following:
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
谁能帮我找出错误?
推荐答案
要使矩阵乘法起作用,您需要将 data.frame(大概就是 da 的意思)转换为矩阵:
To get the matrix multiplication to work, you need to convert the data.frame (presumably that's what da is) to a matrix:
t(da)%*%as.matrix(da)
但这给出了一个 7x7 矩阵,它不能添加到您正在使用的 3x3 单位矩阵中.你的意思是这样的:
But this gives a 7x7 matrix which can't be added to the 3x3 identity matrix that you're using. Do you mean something like:
ma=diag(7)+t(da)%*%as.matrix(da)
您可能想看看 R 简介 如果您对矩阵和 data.frame 之间的区别没有信心.
You may like to have a look at An Introduction to R if you don't feel confident about the difference between a matrix and data.frame.
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