I have been using Matlab for many years but this is my first time working with a 3D array. My data is 290x480x90 in the format latitude x longitude x frequency. So it contains sound pressure data for a range of locations at different frequencies. I am wondering if I could then create a separate array e.g. 10x2x1 of lat/lon locations at a particular freq of interest that lie within the main array, and pull those data points out? Those specific locations of interest therefore don't necessarily occur as points of the 3D array but they are within it... hopefully that makes sense.