4D Array plot data between two gps points

Hi!

I have a 4D array

u1=rand(241,97,1,1637), that is (lon,lat,depth,time)

If I select a lon, lets say lon = 50 then I plot ud = squeeze(u1(50,:,:,:)), that makes an extraction of data at 50 of lon,

but what I want is to make this plot between lon = 10 and lon = 70, like a diagonal and not a line folowing one lon.

Any idea?

Thanks!