func ReshapeParams(val *matrix.Matrix, layerSizes []int) []*matrix.Matrix {
vals := val.Values()
thetas := make(nn.Parameters, 0, len(layerSizes)-1)
offset := 0
for i := 0; i < len(layerSizes)-1; i++ {
thetas = append(thetas, matrix.FromSlice(vals[offset:offset+(layerSizes[i+1]*layerSizes[i]+1)], layerSizes[i+1], layerSizes[i]+1))
offset += layerSizes[i+1]*layerSizes[i] + 1
}
return thetas
}
