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Section: String Functions
The deblank function removes spaces at the end of a string when used with the syntax 
y = deblank(x)
 where x is a string, in which case, all of the extra spaces in x are stripped from the end of the string. Alternately, you can call deblank with a cell array of strings 
y = deblank(c)
in which case each string in the cell array is deblanked.
A simple example
--> deblank('hello   ')
ans = 
hello
and a more complex example with a cell array of strings
--> deblank({'hello  ','there ','  is  ','  sign  '})
ans = 
 [hello] [there] [  is] [  sign]