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sse
2012 Oct 19
1
Optimization in R similar to MS Excel Solver
...0.25
0.25 0.25
and
Ca in river(%) 0.33
Mg in river (%) 0.0114
I want to optimize the contribution values (currently set at 0.25) by
minimizing the sum of squares of the relative errors of the mixing model,
calculated as follows:
SSRE =( (x1-((a1*c1)+(a2*c2)+(a3*c3)+(a4*c4))/x1)^2) +
(x2-((b1*c1)+(b2*c2)+(b3*c3)+(b4*c4))/x2)^2)
Where:
x1 = calcium in river;
x2 = magnesium in river;
a1:a4 = Ca in topsoil, channel banks, roads, drains
b1:b4 = Mg in topsoil, channel banks, roads, drains
c1:4 = Contribution to be optimized
I ca...