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Take two matrices which depends on three parameters i1,i2 and i3

m1 = {{i1, 0, 0}, {0, i2, 0}, {0, 0, 0}}
m2 = {{0, i1, 0}, {0, i2, 0}, {0, 0, i3}}

I am using a function defined as

NT[n_] := Module[{n1 = n},
  Table[Table[Eigenvalues[n1], {i1, 0, 1, 0.2}], {i2, 0, 0.2, 
    0.1}, {i3, 0, 0.3, 0.1}]
]

((But I need to plot the value of the factor (NT[m1])^2-NT[m2]))^2 with all combinations of the values of the parameters i2 and i3) In all the Plots the Value of the parameter appear along the X-Axis. (I am able to find out the numerical values of the factor (NT[m1])^2-(NT[m2])^2 as given below, but how to make,list plot of \ this factor with all the combinations of the parameter values i2 and i3)

I tried the following code

NT[n_] := Module[{n1 = n},
  Table[ListLinePlot[Table[Eigenvalues[n1], {i1, 0, 1, 0.2}], 
    PlotLabel -> Row@{"i2=", i2, "i3=", i3}], {i2, 0, 0.2, 0.1}, {i3, 
    0, 0.3, 0.1}]
  ]

but do not calculate the factor (NT[m1])^2-NT[m2]))^2

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Honestly speaking, your question is not very clear. I put this answer based on what I understand

nt[i1_, i2_, i3_] := Module[{m1, m2, ev1, ev2},
   m1 = {{i1, 0, 0}, {0, i2, 0}, {0, 0, 0}}; 
   m2 = {{0, i1, 0}, {0, i2, 0}, {0, 0, i3}};
   ev1 = Sort@Eigenvalues[m1];
   ev2 = Sort@Eigenvalues[m2];
  (ev1[[#]]^2 - ev2[[#]]^2) & /@ Range[Length[ev1]]
  ] 

Table[
  dat = Table[{i, nt[i, j, k]}, {i, 0, 1, 0.1}];
  ListLinePlot[Table[{#[[1]], #[[2, i]]} & /@ dat, {i, 3}], 
   Frame -> True,FrameLabel -> {"i1", None}, 
   PlotLabel -> Row@{"i2=", j, "i3=", k}]
,{j, 0, 1, 0.5}, {k, 0, 1, 0.5}] // Grid

enter image description here

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