Change Major & minor tickmarks

Hello: I'm trying to alter the tickmarks in my meteogram just like this one http://www.ncl.ucar.edu/Applications/Scripts/tm_11.ncl But I don't know how to do that, because I haver 4 plots and this scripts re draw the plots. I can't imagine how to alter my script so my major tickmark in the meteogram show the day (16, 17, 18, 19..) and mi minor tickmark show me the hour (1,2,3,4,5,6,7,8,9,10,11,12,13,14..). The day always change, but the times don't (minor tickmark). Could you give me a guide? I attach my script. Regards Vanesa

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