meas, k nearest neighborhood

Hi,
In this code I don't understand that what meas does, and it assings all row and 3rd and 4th column to x. 
load fisheriris
x = meas(:,3:4);
gscatter(x(:,1),x(:,2),species)
Thank you

Answer 1

[Star Strider]

Apparently ‘meas’ is a matrix, The ‘x’ assignment takes columns 3 and 4 from it.

It would have been just as easy (and likely more efficient) to simply code it as:

gscatter(meas(:,3),meas(:,4),species)

and remove ‘x’ altogether.