How to create a polar histogram in Matlab using a text file

i am trying to make a polar histogram showing significant wave height and wave direction in matlab but i cant figure out how to do it. any tips?

Answer 1

[KALYAN ACHARJYA]

% Load the data with import options
filename = 'Mlf_waves2014.txt';
opts = detectImportOptions(filename, 'FileType', 'text', 'Delimiter', '\t');
opts.VariableNamesLine = 1; % Ensure variable names are taken from the first row
data = readtable(filename, opts);

% Rename variables for easier access
data.Properties.VariableNames = {'DateTime', 'Latitude', 'Longitude', 'Flag', ...
    'Hs', 'Hmax', 'Tp', 'Tz', 'Dirp', 'Spread', 'SST'};

% Extract significant wave height and wave direction
Hs = data.Hs; 
Dirp = data.Dirp;

% Remove invalid data
validData = Hs < 9999 & Dirp < 9999;
Hs = Hs(validData);
Dirp = Dirp(validData);

% Convert wave direction to radians
Dirp_rad = deg2rad(Dirp);

% Create the polar histogram
figure;
polarhistogram(Dirp_rad, 16, 'Normalization', 'probability');
hold on;

% Overlay wave heights using polarscatter
polarscatter(Dirp_rad, Hs, 30, Hs, 'filled'); % Size of dots is proportional to Hs
colorbar;
colormap('jet');
title('Polar Histogram of Significant Wave Height and Wave Direction');