Filling NaN void in polar plot

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djr 2018-10-17

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https://ww2.mathworks.cn/matlabcentral/answers/424588-filling-nan-void-in-polar-plot

评论： djr 2018-10-18

采纳的回答： Chad Greene

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Hello Everyone,

I am dealing with a polar plot that is incomplete due to NaN values in the data. Please see figure 'Void polar plot.png'.

If I replace NaNs with zeros then, of course, I get the whole graph but I do not know if zero is the physically right replacement for NaNs in my problem. This is shown in figure 'Nan to 0.png'. I have also attached the variable Vq that I am plotting (NaNs are replaced with zeros).

Would it be possible to have the same (complete) polar plot with NaNs being in grey color and color bar indicating only the range of real data (excluding grey color)?

My code is as follows:

clear
close all
% Set azimuth and radial range
AngRange = deg2rad([0 180]);
RadRange = [0 2];
% Set polar grid spacing in radial direction
RD = 0:0.5:2;
% Axis properties
axprop = {'DataAspectRatio',[1 1 1],'View', [0 90],...
    'Xlim', [-2 2],'visible','off'};
% Load data
load('Vq.mat')
% Plot results using Math Works function for polar plot
polarplot3d(Vq,'plottype','surfn','InterpMethod','linear',...
    'AngularRange',AngRange,'RadialRange',RadRange,...
    'PolarDirection','cw','TickSpacing',15,...
    'PolarGrid',{RD,length(RD)+1},'GridStyle',':');
set(gca,axprop{:});
% Add color bar
ColBar = colorbar('Location','west');