Mathematica 中带有文本(具有特定位置)的图

Plots with in-texts (with specificed positions) in Mathematica

我有一个图,我在图中的每个块中绘制了不同的方程式。使用文本,我想为每个方程式写一个小符号。 Text 函数不产生结果。还有没有办法指定文本的坐标?例如,我希望文本阅读 Eqn 1(见下文)放置在 (0, 0.5)

这是我的代码:

Pars = {ep -> 0.5, f1p -> 0.3, f2p -> 0.1, dp -> 0.05, q -> 0.1, 
   en -> 0.4, d -> 0.1, Q -> 0.1, f2n -> 0.3, f1n -> 0.4, a -> 0.05, 
   N1 -> 0.5, N2 -> 0.5}; #Parameters

PlotREq1 = 
  Plot[R = S /. Pars, {S, 0, 0.9375}, 
   PlotRange -> {{0, 3.5}, {0, 2}}, PlotStyle -> {Red, Thick, Dashed},Text[Eqn1]];  
PlotREq2 = 
  Plot[R = (a + d)/(en f1n) /. Pars, {S, 0.9375, 1.4375}, 
   PlotRange -> {{0, 3.5}, {0, 2}}, PlotStyle -> {Green, Thick, Dashed}, Text[Eqn2]];
PlotREq3 = 
  Plot[R = ((a + d) (f1p - f2p))/(en (f1p f2n - f1n f2p)) /. Pars, {S,
     1.4375, 2.3}, PlotRange -> {{0, 3.5}, {0, 2}}, 
   PlotStyle -> {Blue, Thick, Dashed}, Text[Eqn3]];
Show[PlotREq1, PlotREq2, PlotREq3]
Show[PlotREq1, PlotREq2, PlotREq3,
 Epilog -> {
   Inset[Framed[Style["Eqn 1", 14], Background -> White, FrameStyle -> None], {0.5, 0.5}], 
   Inset[Style["Eqn 2", 14], {1.18, 1.05}], 
   Inset[Style["Eqn 3", 14], {1.9, 1.6}]}]