pls.env(-2.0f, 10.0f, -0.4f, 1.2f, 0, 1);
pls.env(-2.0, 10.0, -0.4, 1.2, 0, 1);
    void plot2()    {        int i;    // Set up the viewport and window using PLENV. The range in X is -2.0 to    // 10.0, and the range in Y is -0.4 to 2.0. The axes are scaled    // separately (just = 0), and we draw a box with axes (axis = 1).        pls.col0(1);        pls.env(-2.0f, 10.0f, -0.4f, 1.2f, 0, 1);        pls.col0(2);        pls.lab("(x)", "sin(x)/x", "#frPLplot Example 1 - Sinc Function");    // Fill up the arrays.        for (i = 0; i < 100; i++) {            x[i] = (i - 19.0f) / 6.0f;            y[i] = 1.0f;            if (x[i] != 0.0)                y[i] = (float) Math.sin(x[i]) / x[i];        }    // Draw the line.        pls.col0(3);        pls.line(100, x, y);    }