MATLAB: R2014b uipanel not showing on figure.

Question

My uipanel is not showing up on the figure no matter what I do. I have no idea what I am doing wrong. I tried googling without success.

ComponentHeight = 60; 
    GUIheight =  13 * ComponentHeight;
    SettingsPanelWidth = 1000; 
    SettingsPanelHeight = 500;
    
    SettingsPanelPosition = [AlarmGatePosition(1), AlarmGatePosition(2)-50-SettingsPanelHeight, SettingsPanelWidth, SettingsPanelHeight];
    f = figure('Name', 'AlarmGate Settings', ...
           'NumberTitle', 'off', ...
           'Color', 'w',...
           'Units', 'pixels',...
           'ToolBar', 'none',...
           'HandleVisibility', 'on',...
           'Position', SettingsPanelPosition,...
           'Resize', 'off',...
           'Tag', 'AlarmGateSettings',...
           'MenuBar', 'none');
       
     infoPanelPosition = [50, SettingsPanelHeight*0.5, SettingsPanelWidth*0.6, SettingsPanelHeight*.45]; 
  infoPanel = uipanel('Parent', f,...
                         'Title', 'Recipients',...
                         'TitlePosition', 'lefttop',...
                         'Tag', 'infoPanel',...
                         'Position', infoPanelPosition,...
                         'Units','pixels',...
                         'BackgroundColor','blue',...
                         'FontSize', 12,...
                         'Visible', 'on',...
                         'HandleVisibility', 'on'...
                        );
    uistack(infoPanel, 'top')

Answer 1

You need to define Units ahead of Position else the Position will be interpreted in default units (which are 'normalized') before the Units then get set to Pixels:

infoPanel = uipanel('Parent', f,...
                         'Title', 'Recipients',...
                         'TitlePosition', 'lefttop',...
                         'Tag', 'infoPanel',...
                         'Units','pixels',...
                         'Position', infoPanelPosition,...
                         'BackgroundColor','blue',...
                         'FontSize', 12,...
                         'Visible', 'on',...
                         'HandleVisibility', 'on'...
                        );