how to use geoplot/geobubble with hold on

I have many longitiud and latitiud and I want to draw them with geobuble/geoplot. But I don't want them all to be the same color, for example I want the first 20 to be red and the next 15 to be yellow and .... . so I want to group them and draw each group separately and at the end see my map with different colors . When I used hold on in a for loop, I get an error

Answer 1

[Vaibhav]

Hi Hamed,

I understand that you are looking for a method to use "hold on" with "geobubble".

According to the MathWorks Documentation provided below, the "geobubble" feature does not support the use of the "hold" command.

https://www.mathworks.com/help/matlab/ref/geobubble.html#bvmaj88-1

Nevertheless, using "hold on" with "geoplot" allows you to depict longitude and latitude points with varied colors. Refer to the code below for implementing "geoplot" to showcase points in different colors.

% Define the latitude and longitude coordinates of the points
lat = [32.30 33.92 35.17 36.98 37.69 38.34];
lon = [-91.05 -91.18 -90.09 -89.11 -89.52 -90.37];

% Calculate the number of points
numPoints = numel(lat);

% Determine the indices for each color
blueIndices = 1:ceil(numPoints/3); % Indices for blue color
redIndices = ceil(numPoints/3)+1:ceil(2*numPoints/3); % Indices for red color
greenIndices = ceil(2*numPoints/3)+1:numPoints; % Indices for green color

% Plot the points using different colors
geoplot(lat(blueIndices), lon(blueIndices), "--gs", "LineWidth", 2, ...
    "MarkerSize", 10, "MarkerEdgeColor", "b", "MarkerFaceColor", [0.5 0.5 0.5]) % Plot blue points
hold on
geoplot(lat(redIndices), lon(redIndices), "--gs", "LineWidth", 2, ...
    "MarkerSize", 10, "MarkerEdgeColor", "r", "MarkerFaceColor", [0.5 0.5 0.5]) % Plot red points
geoplot(lat(greenIndices), lon(greenIndices), "--gs", "LineWidth", 2, ...
    "MarkerSize", 10, "MarkerEdgeColor", "g", "MarkerFaceColor", [0.5 0.5 0.5]) % Plot green points
hold off

% Set the limits of the map
geolimits([31.60 38.91], [-95.61 -84.27])

% Set the basemap style
geobasemap grayterrain

For more information about "geoplot" you can refer to the following MathWorks documentation:

https://www.mathworks.com/help/matlab/ref/geoplot.html?s_tid=doc_ta

Hope this helps!

[Aymane ahajjam]

Thank you!!!