this is Matlab question

I have two sets of data, stress and strain. this a project and i have only 5 values in y and 9 values in x axis.

x values (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016)

and y value (0, 0.05, 0.1, 0.15, 0.2)

I need both vectors to be the same length, which would be [9 X1]. I am not sure what to do . can anyone plese help me? thank you in advance