Am i correct in thinking the flux i get, is in order of groups 1_i value then group 2_i value then group 1_i+1 value and then group 2_i+1 value?

i want to plot two energy group flux, the problem i’m currently facing is that i don’t understand what is being plotting cause it takes a weird shape. so my instinct is that the data is in group1 and group 2 first value then second for both and then third for both.