MATLAB: Importing only a fraction of a database using dataset

data importdataset

I have a large dataset in csv format (400MB). How can I import in MatLab only the first 500 rows?

nc=6; % Number of column in your csv file
nr=500  
data=csvread('file.csv',0,0,[0 0 nr-1 nc-1])

out = nanmean(ArrDelay);

or in MATLAB R2015a

out = mean(ArrDelay,'omitnan'));

Thank you so much for your answers!

I will upload a file so you can see.

What I need is to take the data from different columns and rows to work with them after. Example. Take C21:J532, C556:H1067, C1089:H1600

After I will need to work on that matrix.