cdm/src/main/java/ucar/unidata/geoloc/vertical/VerticalTransformImpl.java
public VerticalTransform subset(Range t_range, Range z_range,
                                    Range y_range, Range x_range)
            throws ucar.ma2.InvalidRangeException {
        return new VerticalTransformSubset(this, t_range, z_range, y_range, x_range);
    }
public VerticalTransform subset(Range t_range, Range z_range,
                                    Range y_range, Range x_range)
            throws ucar.ma2.InvalidRangeException {
        return new VerticalTransformSubset(this, t_range, z_range, y_range, x_range);
    }
Create a subset of this VerticalTransform.

@param t_range subset the time dimension, or null if you want all of it
@param z_range subset the vertical dimension, or null if you want all of it
@param y_range subset the y dimension, or null if you want all of it
@param x_range subset the x dimension, or null if you want all of it

@return the subsetted VerticalTransform

@throws ucar.ma2.InvalidRangeException if any of the range parameters are illegal