How to declare and instantiate a Double vector?

Question

I’m trying to fill a Double vector with 1’s, but I don’t know how to declare and instantiate the variable.

double betaParcial[] = null;

// 'linha' seria o tamanho do vetor, e pode assumir qualquer numero (ex.: 3 ou 4)
for(int i=0 ; i<linha; i++) { 
    betaParcial[i] = 1.0; // Ocorre o erro
}

Answer 1

Try:

double betaParcial[] = new double[linha];