xbox {waveslim}

Image with Box and X

Description

xbox(i,j) = I_{[i=n/4,\;3n/4,\;j;~ n/4 \leq j \leq 3n/4]} +

I_{[n/4 \leq i \leq 3n/4;~ j=n/4,\;3n/4,\;i]}

Usage

data(xbox)

Format

A 128 \times 128 matrix.

Source

S+WAVELETS.

References

Bruce, A., and H.-Y. Gao (1996) Applied Wavelet Analysis with S-PLUS, Springer: New York.