converting sym to double

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Parth Jain
Parth Jain 2020-3-19
评论： Parth Jain 2020-3-19
i have been working on this code
syms k
K = zeros(8);
K(1,1) = 0.7499*k
MATLAB shows the error "unable to convert expression into double array"
Also in general How do I create a matrix with symbolic expressions as element values for any given matrix.

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采纳的回答

Sriram Tadavarty
Sriram Tadavarty 2020-3-19
Hi Parth,
The way the syms is used here is the issue. See the link, which provides examples to get started.
Do not define the K with double variables and that should help. Instead directly create the matrix with those many symbolic variables.
Hope this helps.
Regards,
Sriram

更多回答（1 个）

Steven Lord
Steven Lord 2020-3-19
Make K a sym array from the start. Then MATLAB doesn't need to convert the symbolic expression 0.7499*k when assigning into an element of K.
K = sym(zeros(8));

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