Fluence/Interrogation Solver Panel - How to replot/analyze exported data

[hayakawa16]

To recreate: select Fluence/Interrogation Solver Panel, Standard Diffusion (Analytic: Isotropic Point Source) or any other forward solver, and then click "Generate Fluence/Interrogation Map". After map is generated click "Export Data". The resulting txt file has three lines in the following format:
% X Values: x0 x1 ...xn
% Y Values: y0 y1...ym
% Map Values: map(x0,y0) map(x1,y0) map(x2,y0)...map(xn,y0) map(x0,y1)...map(xn,y1)....map(xn,ym)
The map values are in row major form.

Question 1: Is there documentation on how to use this outputted text file and plot or rehydrate the result using Matlab? or Excel?

Question 2: What are the units of the Fluence, Absorbed Energy, and Photon Hitting Density results?

Thank you,
This question comes from a skype conversation I had with a current user of our GUI. Carole