add

Add data to polar plot

Syntax

add(p,data)

add(p,angle,magnitude)

Description

add(p,data) adds antenna pattern data based on the real amplitude values in data to the polar plot p.

add(p,angle,magnitude) adds data sets of angle vectors and corresponding magnitude matrices to polar plot p.

Examples

Add Data to Existing Polar Plot

Create a cosine-pattern antenna and plot the pattern from 0° to 36°.

az = [0:360];
p1 = abs(cosd(az));

Plot the polar pattern.

P = polarpattern(p1);

Create a second cosine-pattern antenna rotated by 60°. Add this pattern to the existing pattern.

p2 = abs(cosd(az - 50));
add(P,p2);

Add Second Plot to Polar Pattern

Create a cosine antenna and plot the polar pattern of its directivity at 75 MHz.

cosineantenna = phased.CosineAntennaElement('FrequencyRange',[1.0e0 100.0e9],...
    'CosinePower',[2,2]);
p1 = pattern(cosineantenna,75.0e6,[-90:90],0,'Type','Directivity');
P = polarpattern([-90:90],p1);

Create an isotropic antenna. Calculate the directivity of this antenna at 75 MHz.

isoantenna = phased.IsotropicAntennaElement('FrequencyRange',...
    [1.0e0 100.0e9]);
p2 = pattern(isoantenna,75.0e6,[-180:180],0,'Type','Directivity');

Add the directivity plot of the isotropic antenna to the directivity plot of the cosine antenna.

add(P,[-180:180],p2);

Input Arguments

p — Polar plot

scalar handle

Polar plot, specified as a scalar handle.

Example: polarpattern

data — Antenna or array data

real length-M vector | real M-by-N matrix | real N-D array | complex vector or matrix

Antenna or array data, specified as one of the following:

• A real length-M vector, where M contains the magnitude values with angles assumed to be $$\frac{(0:M-1)}{M}\times {360}^{\circ }$$ degrees.

• A real M-by-N matrix, where M contains the magnitude values and N contains the independent data sets. Each column in the matrix has angles taken from the vector $$\frac{(0:M-1)}{M}\times {360}^{\circ }$$ degrees. The set of each angle can vary for each column.

• A real N-D array, where N is the number of dimensions. Arrays with dimensions 2 and greater are independent data sets.

• A complex vector or matrix, where data contains Cartesian coordinates ((x,y) of each point. x contains the real part of data and y contains the imaginary part of data.

When data is in a logarithmic form such as dB, magnitude values can be negative. In this case,polarpattern plots the lowest magnitude values at the origin of the polar plot and highest magnitude values at the maximum radius.

Example: pattern(dipole,70e6)

angle — Set of angles

vector in degrees

Set of angles, specified as a vector in degrees.

magnitude — Set of magnitude values

vector | matrix

Set of magnitude values, specified as a vector or a matrix. For a matrix of magnitude values, each column is an independent set of magnitude values and corresponds to the same set of angles.

Version History

Introduced in R2016a