MATLAB: Thick border for a plot

thick axesthick border around the plot

I have a plot like this
As can be seen, there is no border on the right side.
My questions:
1- Why?
2- How to get it solved?
3- How to make the axes thicker (how to change the linewidth of the axes)?
4- How to make a thick border around the plot (the line indicated in red shape)?
Thanks for your help!

Best Answer

box on
ax = gca
ax.LineWidth = 6