MATLAB - polarscatter

Create Scatter Chart

Create a scatter chart in polar coordinates.

  th = pi/4:pi/4:2*pi;
r = [19 6 12 18 16 11 15 15];
polarscatter(th,r)
fig2plotly()

• Plot
• SSIM

Use Filled Markers and Set Marker Size

Create a scatter chart that uses filled markers by specifying the optional input argument, 'filled'. Set the marker size to 75 points squared.

  th = linspace(0,2*pi,20);
r = rand(1,20);
sz = 75;
polarscatter(th,r,sz,'filled')
fig2plotly()

• Plot
• SSIM

Use Markers with Varying Sizes and Colors

Create a scatter chart with markers of varying sizes and colors. Specify the optional size and color input arguments as vectors. Use unique values in the color vector to specify the different colors you want. The values map to colors in the colormap.

  th = pi/4:pi/4:2*pi;
r = [19 6 12 18 16 11 15 15];
sz = 100*[6 15 20 3 15 3 6 40];
c = [1 2 2 2 1 1 2 1];
polarscatter(th,r,sz,c,'filled','MarkerFaceAlpha',.5)
fig2plotly()

• Plot
• SSIM

Convert from Degrees to Radians Before Plotting

Create data where the angle values are in degrees. Since polarscatter requires angle values in radians, convert the values to radians before plotting using deg2rad.

  th = linspace(0,360,50);
r = 0.005*th/10;
th_radians = deg2rad(th);
polarscatter(th_radians,r)
fig2plotly()

• Plot
• SSIM

Combine Two Scatter Charts

Combine two scatter charts in the same polar axes using the hold command. Add a legend with a description of each chart.

  th = pi/6:pi/6:2*pi;
r1 = rand(12,1);
polarscatter(th,r1,'filled')

hold on 
r2 = rand(12,1);
polarscatter(th,r2,'filled')
hold off

legend('Series A','Series B')
fig2plotly()

• Plot
• SSIM

Modify Scatter Chart After Creation

Create a scatter chart and assign the scatter object to the variable ps.

  th = pi/6:pi/6:2*pi;
r = rand(12,1);
ps = polarscatter(th,r,'filled')
fig2plotly()

• Plot
• SSIM

  
ps = 
  Scatter with properties:

             Marker: 'o'
    MarkerEdgeColor: 'none'
    MarkerFaceColor: 'flat'
           SizeData: 36
          LineWidth: 0.5000
          ThetaData: [1x12 double]
              RData: [1x12 double]
              ZData: [1x0 double]
              CData: [0 0.4470 0.7410]

  Show all properties


fig2plotly()

Use ps to modify properties of the scatter object after it is created.

  ps.Marker = 'square';
ps.SizeData = 200;
ps.MarkerFaceColor = 'red';
ps.MarkerFaceAlpha = .5;
fig2plotly()

• Plot
• SSIM