You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: TS_LowDimInspect.m
    path of file: ./repos/hctsa/PlottingAnalysis
    
    the code of the file until where you have to start completion: function TS_LowDimInspect(whatData,whatAlgorithm,maxLength)
% LowDimGUI Plot time series in low-dimensional projection.
%
%---INPUTS:
% whatData: The HCTSA data file to use
% whatAlgorithm: The dimensionality-reduction algorithm to use ('pca','tsne')
% maxLength: maximum l
    
function annotateFigure_Callback(hObject,eventData)
    % Bits and pieces from BF_AnnotatePoints

    if ~isempty(hObject.UserData)
        pC = hObject.UserData;
        delete(pC);
    else
        delete(tHandle)
    end

    coordinates = get(h_LowDim,'CurrentPoint');
    point = coordinates(1,1:2);
    iPlot = BF_ClosestPoint_ginput(lowDimComponents,point,true);
    plotPoint = lowDimComponents(iPlot,:);
    theGroupIndex = groupLabelsInteger(iPlot);

    if theGroupIndex==0
        % An unassigned class
        theColor = ones(1,3)*0.5;
        thisClassLabel = '<Unlabeled>';
    else
        theColor = groupColors{theGroupIndex};
        thisClassLabel = classLabels{theGroupIndex};
    end