// weight A by alpha and B by 1-alpha if alpha == 1 then returns A
private double[] weightedSum(double[] A, double[] B, double[] W) {
assert ((A.length == B.length) && (A.length == W.length)) : "Warning!";
double[] C = new double[A.length];
for (int i = 0; i < A.length; i++) {
C[i] = (1 - W[i]) * A[i] + W[i] * B[i];
if (C[i] == Double.NaN) {
System.out.println("Warning generated NaN: T = " + T);
LinAlg.print(W);
}
}
return C;
}
