How to get coefficients from a formula?

[lalili]

Hello
If I have a formula, can I get a coefficient for every one of the variables?
For example, if I set F1 = 0. F2 = 1, I will get the coefficient of F1 (=10)
Is there a better way to get coefficients from every one of the variables (F1, F2, F3)?

ExprEvaluator util = new ExprEvaluator();
util.defineVariable("F1", 0);
util.defineVariable("F2", 1);
util.defineVariable("F3", 0);
IExpr exp2 = util.evaluate("F1+10*F2+15*F3").evalDouble();//10

thank you

[axkr]

You can use some of these functions for polynomials:

• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/Coefficient.md

• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/CoefficientList.md

• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/Exponent.md

• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/MonomialList.md