Dear R users I am trying to write an R function to solve for a,b,c in the following system of equations, given any value of x1, x2 and x3: b^2 + 6*b*a + 2*c^2 + 15*a^2 = x1 2*c*(b^2 + 24*b*a + 105*a^2 + 2) = x2 24*(b*a + c^2*(1 + b^2 + 28*b*a) + a*(12 + 48 *b*a + 141*c^2 + 225*a^2)) =x3 Could you give me suggestions about which R function(s) I can use to solve this problem and how I should use these functions? Thank you very much for your assistance, Walter Leite
question about ways to solve nonlinear system
2 messages · Leite,Walter, Uwe Ligges
2 days later
Leite,Walter wrote:
Dear R users I am trying to write an R function to solve for a,b,c in the following system of equations, given any value of x1, x2 and x3: b^2 + 6*b*a + 2*c^2 + 15*a^2 = x1 2*c*(b^2 + 24*b*a + 105*a^2 + 2) = x2 24*(b*a + c^2*(1 + b^2 + 28*b*a) + a*(12 + 48 *b*a + 141*c^2 + 225*a^2)) =x3 Could you give me suggestions about which R function(s) I can use to solve this problem and how I should use these functions? Thank you very much for your assistance, Walter Leite
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R itself cannot calculate symbolically (which is what you want to do it in this case, I guess), "just" numerically. Uwe Ligges