How can I create a quadratic matrix with variables?

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Edoardo Cioffi
Edoardo Cioffi 2022-7-7
评论： Karim 2022-7-7
I need to create the matrix of such that i get the matrix and so on? I need all the elements of the nxn matrix to be variables. I tried with :
syms q1dot q2dot q3dot q4dot q5dot;
qdot= [q1dot q2dot q3dot q4dot q5dot].'*[q1dot q2dot q3dot q4dot q5dot];
but it doesn't seem to work. Many thanks.

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回答（2 个）

KSSV
KSSV 2022-7-7
Ran in:
syms q [1 5] real
iwant = q'*q
iwant = 
Karim
Karim 2022-7-7
Ran in:
you do not need to use .' in this case, only use the transpose operator:
syms q1dot q2dot q3dot q4dot q5dot real
qdot= [q1dot q2dot q3dot q4dot q5dot]' * [q1dot q2dot q3dot q4dot q5dot]
qdot = 

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