Draw any graph in your custom editor.

Go to Window -> Package Manager and add from git URL using this URL:

https://github.com/MPrzekop/unity-inspector-graph-drawer.git

Create Dummy field and give it attribute [Graph("Method name")]

template:

 [Graph("F")] public float dummy;
       
 public float F(float x)
 {
     return Mathf.Sin(x) + Mathf.Sin(x*25)*0.2f;
 }

full parameters (Method name, function x start, function x end, rect height, sample count):

 [Graph(MethodName: "F",start:-5,end: 5,rectHeight:200,samples:400)] public float dummyFull;

Visualised method has to be declared as public float MethodName(float x)

In custom editor create a call to GraphDrawer.DrawGraph() there are overloads for:

• array of Vector3 points
• arbitrary points wraper with line color and width
• function container with line color and width

Graph values by default are stretched to a width of inspector window:

but can also be declared to have regular grid:

There is demo component and custom editor for it.