Main Content

viewArray

System object: phased.ReplicatedSubarray
Package: phased

View array geometry

Syntax

viewArray(H)
viewArray(H,Name,Value)
hPlot = viewArray(___)

Description

viewArray(H) plots the geometry of the array specified in H.

viewArray(H,Name,Value) plots the geometry of the array, with additional options specified by one or more Name,Value pair arguments.

hPlot = viewArray(___) returns the handles of the array elements in the figure window. All input arguments described for the previous syntaxes also apply here.

Input Arguments

H

Array object.

Name-Value Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Parent

Handle to the axes along which the array geometry is displayed.

ShowNormals

Set this value to true to show the normal directions of all elements of the array. Set this value to false to plot the elements without showing normal directions.

Default: false

ShowLocalCoordinates

Logical flag specifying whether to show the local coordinate axes.

Default: true

ShowAnnotation

Logical flag specifying whether to show the annotations in the UI panel of the figure. Annotation shows aperture size and element spacing based on array axis of array.

Default: true

Orientation

Orientation of the array, specified as a 3-by-1 column vector containing the rotation angles with respect to the x-, y-, and z-axes of the local coordinate system, respectively. The default value is [0;0;0].

Default: [0;0;0]

ShowTaper

Set this value to true to specify whether to change the element color brightness in proportion to the element taper magnitude. When this value is set to false, all elements are drawn with the same color.

Default: false

ShowIndex

Vector specifying the element indices to show in the figure. Each number in the vector must be an integer between 1 and the number of elements. You can also specify the value as 'All' to show indices of all elements of the array or 'None' to suppress indices.

Default: 'None'

ShowSubarray

Vector specifying the indices of subarrays to highlight in the figure. Each number in the vector must be an integer between 1 and the number of subarrays. You can also specify the value as 'All' to highlight all subarrays of the array or 'None' to suppress subarray highlighting. Highlighting uses different colors for different subarrays.

Default: 'All'

Title

Character vector specifying the title of the plot.

Default: 'Array Geometry'

Output Arguments

hPlot

Handles of array elements in figure window.

Examples

expand all

This example shows how to construct a full array by replicating subarrays.

Create a hexagonal array to use as a subarray.

Nmin = 9;
Nmax = 17;
dy = 0.5;
dz = 0.5*sin(pi/3);
rowlengths = [Nmin:Nmax Nmax-1:-1:Nmin];
numels_hex = sum(rowlengths);
stopvals = cumsum(rowlengths);
startvals = stopvals-rowlengths+1;
pos = zeros(3,numels_hex);
rowidx = 0;
for m = Nmin-Nmax:Nmax-Nmin
    rowidx = rowidx+1;
    idx = startvals(rowidx):stopvals(rowidx);
    pos(2,idx) = (-(rowlengths(rowidx)-1)/2:...
        (rowlengths(rowidx)-1)/2) * dy;
    pos(3,idx) = m*dz;
end
hexa = phased.ConformalArray('ElementPosition',pos,...
    'ElementNormal',zeros(2,numels_hex));

Arrange copies of the hexagonal array on a sphere.

radius = 9;
az = [-180 -180 -180 -120 -120 -60 -60   0  0  60 60 120 120 180];
el = [-90   -30   30  -30   30 -30  30 -30 30 -30 30 -30  30  90];
numsubarrays = size(az,2);
[x,y,z] = sph2cart(deg2rad(az),deg2rad(el),...
    radius*ones(1,numsubarrays));
ha = phased.ReplicatedSubarray('Subarray',hexa,...
    'Layout','Custom',...
    'SubarrayPosition',[x; y; z], ...
    'SubarrayNormal',[az; el]);

Display the geometry of the array, highlighting selected subarrays with different colors.

viewArray(ha,'ShowSubarray',3:2:13,...
    'Title','Hexagonal Subarrays on a Sphere');
view(0,90)