.DECIMATION FACTORS X, Y: 3, 2
[Enter decimation factors for NSAM and NROW dimensions.]
If the input file is a 3D volume, SPIDER asks:
.DECIMATION FACTOR X, Y, & Z: 3, 2, 3
[Enter decimation factor for NSLICE dimension.]
NOTES
In the above example, the dimensions of the the output file
will be reduced to NSAM/3, NROW/2, NSLICE/3. Only every third,
second, and third (in respective dimentions) voxels will
be retained, the remaining voxelss will be skipped.