TYPE: CHOP
TITLE: Delete CHOP

The Delete CHOP removes channels coming from its input. The channels are
selected by a variety of methods, which may be layered. The first method
uses a text string to select channels by name or index. The second method
uses a value range to select channels with samples within or outside the range.
The third method selects constant-valued channels. 

An option selects whether to delete or output the selected channels.

These kinds of channel name patterns are used to select existing channels 
in an input CHOP:
~c(
    chan2           - Matches a single channel name.
    chan3 tx ty tz  - Matches several channel names, separated by spaces.
    chan*           - Matches each channel that starts with "chan".
    *foot*          - Matches each channel that has "foot" in it.
    t?              - ? Matches a single character. t? Matches 2-character channels starting with t.
    t[xyz]          - [xyz] Matches 3 characters, giving tx, ty and tz.
    blend[3-7:2]    - Matches number ranges: blend3, blend5, and blend7.
    blend[2-3,5,13] - Matches channels blend2, blend3, blend5, blend13.
~c)

These kinds of channel number patterns can be used to select existing channels
in an input CHOP:
~c(
    0 1 4           - Matches the first, second and fifth channel.
    [0-4]           - Matches the first five channels.
    [3-9:2]         - Matches channels at indices 3,5, 7 and 9.
~c)

There are no local variables.

Parameters
    Delete              - Determines whether the selected channels
			  should be deleted or retained.
	Scoped Channels     - The selected channels are deleted. The rest
			      are output.
	Non-Scoped Channels - The selected channels are output. The rest
			      are deleted.
    Select Channels     - Chooses channel selection by name or by index.
    Channel Names       - The names of the channels to delete or extract.
			  See the possible scope patterns below.
    Channel Numbers     - The indices of the channels to delete or extract.
			  See possible number patterns below.
    Channel Value       - Chooses the type of value range selection:
	Off                              - Don't perform range selection.
	Channel Completely Within Range  - All the channel's samples must
					   be within the specified range
					   for it to be selected.
	Channel Partially Within Range   - At least one of the channel's
					   samples must be in the range
					   for it to be selected.
	Channel Completely Outside Range - None of the channel's samples
					   can be in the range for it
					   to be selected.

    Value Range         - The lower and upper values of the        /delrange
			  range used for Range Selection.
    Select Constant Valued Channels - Select channels which have the same value
				      for all samples

See also: Copy
