How to decrease distance between xlabel and xaxis

[Márcio Barbalho]

Hi all,

 

Do you know if there's a way of customising this 'little' detail. I have searched online with no luck. I tried exporting data to gnuplot separately but it's much harder to change font properties in gnuplot. So I wonder if any of you has done this before. To my eyes and many papers reviwers, the labels are placed a bit far from the axis which leads to a smaller graph for the same available area.

 

Regards

 

Márcio