How to change the size of error bar?

I need to change the size of the vertical line of error bar. so I dont mean the size of cap like 'CapSize',18

Answer 1

[Star Strider]

I am not certain what you want.

Try this:

errs = rand(1,10);
x = 1:10;
y = randi([10 20],1,10);

figure
plot(x, y)
hold on
heb = errorbar(x, y, errs, '.');
hold off
grid
heb.LineWidth = 2;

The error bars and the caps are both linewidth=2 here, with everything else being the default properties.

[Zeynab Mousavikhamene]

I tried heb.LineWidth with different numbers but did not show any difference in the output.

[Star Strider]

It worked for me (in R2019b). It should show a difference with respect to the width of the blue line.

If you have R2014a or earlier, my code may not work. I have no way of dealing with that, because I no longer have access to those releases.

Example —

errs = rand(1,10);
x = 1:10;
y = randi([10 20],1,10);

figure
plot(x, y)
hold on
heb = errorbar(x, y, errs, '.');
hold off
grid
heb.LineWidth = 5;

produces:

Admittedly,

heb.LineWidth = 5;

is exaggerated from what you might normally use, however my code does produce the widened error bars.

[Zeynab Mousavikhamene]

I have version 2018b and it does not work. Dont have any idea why.

[Star Strider]

It should.

Be certain you have all the updates.

To see if any updates are available, there is a bell icon in the upper right corner of the MATLAB window that is used for notifications, so see if there are any. Otherwise, if you just want to check without doing that, either click on the Add-Ons or Help buttons in the top toolstrip, and then click ‘Check for Updates’.

A Toolbox path problem is another possibility. Run these lines from your Caommand Window or a script:

restoredefaultpath 
rehash toolboxcache 

to see if that solves the problem. If it does not, use the Contact Us telephone handset icon in the upper right corner of this page to get Technical Support.

[Zeynab Mousavikhamene]

I found it just change the linewitdth inside the error bar like this:

     errorbar(...,'.m','CapSize',20,'LineWidth',2);

Thank you

[Star Strider]

As always, my pleasure!