$r=2$

$r=3$

n

${\Vert f-Q_n^{r}f\Vert }_{L^2\left(\left[0,1\right]\right)}$

Cvge.

rate

${\Vert f-Q_n^{r}f\Vert }_{L^2\left(\left[0,1\right]\right)}$

Cvge.

rate

0

5.117732 × 10⁻²

4.773745 × 10⁻³

1

1.470808 × 10⁻²

1.80

1.027466 × 10⁻³

2.22

2

4.010015 × 10⁻³

1.87

1.733843 × 10⁻⁴

2.57

3

1.024519 × 10⁻³

1.90

3.119091 × 10⁻⁵

2.47

4

2.749527 × 10⁻⁴

1.97

4.745002 × 10⁻⁶

2.72

5

6.915563 × 10⁻⁵

1.99

9.036384 × 10⁻⁷

2.39