Hi inzamam,
As per my understanding, the values of coefficients returned from 'coeffs' is different from your expected values.
Given your equation 'Disp =X1*(4*X2 - 4*X1 + 1)' and the MATLAB command '[EQ_01, T] =coeffs(Disp , [X1 X2])' , 'coeffs' returns the coefficients of 'Disp' with respect to the symbolic variables 'X1' and 'X2'. When extracting coefficients of 'Disp' with 'X1' and 'X2' as variables, the equation simplifies to '-4X1^2 + 4X1X2 + X1'. This operation will return the coefficients of 'X1^2', 'X1X2' , and 'X1', which are -4, 4, and 1, respectively.
It is important to note that when obtaining coefficients with respect to 'X1', 'X1' itself cannot appear in the coefficients. This is because the operation is designed to isolate the factors multiplying 'X1' directly, not to include 'X1' as part of its own coefficient.
Refer to the following documentation to know more about 'coeffs':
