How can I change the width of horizontal lines of error bars in ERRORBAR plot in MATLAB 2015b?

I am working with MATLAB 2015b and when using the ERRORBAR function, I would like to be able to change the length of the horizontal lines appearing on top and bottom of the error bars.

This question has been answered for the 2014 version of MATLAB but the solution doesn't work for the newer version of MATLAB.

Thanks in advance for your help.

Example:

x = [1 2 3 4];

y = [1 2 1 2];

dy = [0.1 0.1 0.1 0.1];

errorbar(x,y,dy)

Answer 1

[André]

The solution is hidden in the comments of Arnaud's errorbar_tick.m.

Edit the original errorbar_tick.m, find the if-else-structure below "% Plot error bars" and replace it with the code Matt posted in the comments:

if strcmpi(flagtype,'errorbar') % ERRORBAR(...)
    x = h.Bar.VertexData(1,:); % Retrieve bar xdata from errorbar 
    dp = length(x)/3; % 3 data points per error bar 
    m = 1; % Multiplier for addition/subtraction 
    for ii = 1:dp 
        m = -1*m; % Switch between subtraction and addition 
        x(dp+ii:dp:end) = x(ii)+m*w/2; % Change xdata with respect to the chosen ratio 
    end 
    h.Bar.VertexData(1,1:end) = x;
  else
      error('Please enter an ErrorBar object!');
  end

Works fine for me on 2015b!

[Lamia Kasmi]

Thanks, indeed it works in the command window, however it doesn't in a script. The solution to that is that one needs to add a "drawnow" after calling the errorbar function and before calling the errorbar_tick function, otherwise errorbar_tick might be faster than the plotting and it might look for the handle before it is even created by the errorbar function. So in summary, in a script, one should use errorbar_tick in the following way:

Example:

x = [1 2 3 4];

y = [1 2 1 2];

dy = [0.1 0.1 0.1 0.1];

h = errorbar(x,y,dy);

drawnow

errorbar_tick(h)

[Walter Roberson]

Lichen WANG comments to Lamia Kasmi:

Your solution 'drawnow' really helps me. Thanks a lot.

[Fiona Macfarlane]

This works for me on 2015b, however when I save the figure (as a .fig file) the width reverts back to the previous situation. Does anyone know how to stop this. I am aware that taking screen-shots is a work around, however this is very time consuming and the quality is not great.