マップ上に凡例を出す方法

取得した緯度と経度のデータと心拍情報を地図上にヒートマップのような形でプロットしたのですが，凡例の出し方が分かりません。ご教授いただけますでしょうか。

下記はマップを書いた時のプログラミングコードと書いたマップです。この凡例を出したいです。

F = fillmissing(HF,'previous');

 nBins = 50;
binSpacing = (max(F) - min(F))/nBins; 
binRanges = min(F):binSpacing:max(F)-binSpacing; 

% Add an inf to binRanges to enclose the values above the last bin.
binRanges(end+1) = inf;

% |histc| determines which bin each speed value falls into.
[~, FBins] = histc(F, binRanges);
 lat = lat';
lon = lon';
FBins = FBins';

% Create a geographical shape vector, which stores the line segments as
% features.
s = geoshape();

for k = 1:nBins
    
    % Keep only the lat/lon values which match the current bin. Leave the 
    % rest as NaN, which are interpreted as breaks in the line segments.
    latValid = nan(1, length(lat));
    latValid(FBins==k) = lat(FBins==k);
    
    lonValid = nan(1, length(lon));
    lonValid(FBins==k) = lon(FBins==k);    

    % To make the path continuous despite being segmented into different
    % colors, the lat/lon values that occur after transitioning from the
    % current speed bin to another speed bin will need to be kept.
    transitions = [diff(FBins) 0];
    insertionInd = find(FBins==k & transitions~=0) + 1;

    % Preallocate space for and insert the extra lat/lon values.
    latSeg = zeros(1, length(latValid) + length(insertionInd));
    latSeg(insertionInd + (0:length(insertionInd)-1)) = lat(insertionInd);
    latSeg(~latSeg) = latValid;
    
    lonSeg = zeros(1, length(lonValid) + length(insertionInd));
    lonSeg(insertionInd + (0:length(insertionInd)-1)) = lon(insertionInd);
    lonSeg(~lonSeg) = lonValid;

    % Add the lat/lon segments to the geographic shape vector.
    s(k) = geoshape(latSeg, lonSeg);
    
end
 wm = webmap('Open Street Map');
 mwLat = 35.293818;
mwLon = 136.927917;
name = 'location';
iconDir = fullfile(matlabroot,'toolbox','matlab','icons');
iconFilename = fullfile(iconDir, 'matlabicon.gif');
wmmarker(mwLat, mwLon, 'FeatureName', name, 'Icon', iconFilename);
colors = autumn(nBins);
 wmline(s, 'Color', colors, 'Width', 5);

Answer 1

[takemoto]

"legend"コマンドの様な直接的な方法は見当たらない様ですが、以下に代替案につい言及があります。

https://jp.mathworks.com/matlabcentral/answers/587933-how-can-i-display-text-and-a-legend-on-a-web-map