How to separate positive and negative symbolic variables of an equation to the left and right sides of the equation in MATLAB?
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for example we have this equation : 3*a - 2*b + 5*c - d = 0
First I need to separate positive and negative variables to both side of equation: 3*a + 5*c = 2*b + d
and then take only the coefficient of each symbolic variables: 3 + 5 = 2 + 1
Thank you
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Walter Roberson
il 29 Nov 2015
syms a b c d
eq = 3*a - 2*b + 5*c - d;
constants = subs( children(eq), {a b c d}, {1 1 1 1} );
pospart = constants(constants>0));
negpart = -constants(constants<0));
sum(postpart) == sum(negpart) %this will usually be false
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