vsel

Mapdl.vsel(type_='', item='', comp='', vmin='', vmax='', vinc='', kswp='', **kwargs)

Selects a subset of volumes.

APDL Command: VSEL

Note

Starting with PyMAPDL v0.66.0, you can use “P” as a second argument to select entities interactively. A window pops up allowing you to select, unselect, add or reselect entities depending on the first argument type_. An array with the ids of new selection is returned when the window is closed.

You can switch between selecting and unselecting pressing the keyboard key U.

Parameters:

type_

Label identifying the type of volume select:

S

Select a new set (default).

R

Reselect a set from the current set.

A

Additionally select a set and extend the current set.

U

Unselect a set from the current set.

ALL

Restore the full set.

NONE

Unselect the full set.

INVE

Invert the current set (selected becomes unselected and vice versa).

STAT

Display the current select status.

itemstr, optional

Label identifying data. Valid item labels are shown in the table below. Some items also require a component label. Defaults to VOLU.

compstr, optional

Component of the item (if required).

vminint, optional

Minimum value of item range. Ranges are volume numbers, coordinate values, attribute numbers, etc., as appropriate for the item. A component name (as specified on the CM (p. 338) command) may also be substituted for VMIN (VMAX and VINC are ignored). If Item = MAT, TYPE, REAL, or ESYS and if VMIN is positive, the absolute value of Item is compared against the range for selection; if VMIN is negative, the signed value of Item is compared. See the VLIST (p. 2050) command for a discussion of signed attributes.

vmaxint, optional

Maximum value of item range. VMAX defaults to VMIN.

vincint, optional

Value increment within range. Used only with integer ranges (such as for volume numbers). Defaults to 1. VINC cannot be negative.

kswpint, optional

Specifies whether only volumes are to be selected:

kswp=0

Select volumes only.

kswp=1

Select volumes, as well as keypoints, lines, areas, nodes, and elements associated with selected volumes. Valid only with Type = S.

Returns:

np.ndarray

Numpy array with the ids of the selected entities. For more information visit Postprocessing.

Notes

Selects volumes based on values of a labeled item and component. For example, to select a new set of volumes based on volume numbers 1 through 7, use VSEL,S,VOLU,,1,7. The subset is used when the ALL label is entered (or implied) on other commands, such as VLIST,ALL. Only data identified by volume number are selected. Data are flagged as selected and unselected; no data are actually deleted from the database.

This command is valid in any processor.

For Selects based on non-integer numbers (coordinates, results, etc.), items that are within the range VMIN-Toler and VMAX+Toler are selected. The default tolerance Toler is based on the relative values of VMIN and VMAX as follows:

If VMIN = VMAX, Toler = 0.005 x VMIN.

If VMIN = VMAX = 0.0, Toler = 1.0E-6.

If VMAX ≠ VMIN, Toler = 1.0E-8 x (VMAX-VMIN).

Use the SELTOL command to override this default and specify Toler explicitly.