How can I remove parentheses in a symbolic expression and perform the operations for the coefficients?
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Zoltán Csáti
le 15 Mar 2014
Commenté : Zoltán Csáti
le 15 Mar 2014
I cannot use parentheses and / operations in my code because PHClab can't interpret them. So I need to remove them. How can I make it? For example I have
x2/24 - x1/6 + (x1*x4)/8 + (2*x3)/15 - (11*x4)/120 - x5/14 + (5*x6)/56 + x7/2 - x8 + x9
and I need
0.04167*x2 - 0.1667*x1 + 0.125*x1*x4 + ... + x9
Thank you
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Réponse acceptée
Mischa Kim
le 15 Mar 2014
Modifié(e) : Mischa Kim
le 15 Mar 2014
syms x2 x1 x4 x3
f = x2/24 - x1/6 + x1*x4/8 + 2*x3/15
f =
x2/24 - x1/6 + (2*x3)/15 + (x1*x4)/8
vpa(f,5) % the "5" denotes the number of significant digits
ans =
0.041667*x2 - 0.16667*x1 + 0.13333*x3 + 0.125*x1*x4
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