EditorPrefs.SetFloat  

static function SetFloat (key : String, value : float) : void

Description

Sets the value of the preference identified by key.

// Simple scripts that creates an empty window and remembers the position and size
// of the created window.

class RememberPosition extends EditorWindow {
    var width : float = 300;
    var height : float = 300;
    var x : float = 100;
    var y : float = 100;

    @MenuItem("Examples/Remember position")
    static function Init() {
        var window = GetWindow(RememberPosition);
        window.Show();
    }
    function Awake() {
        width = EditorPrefs.GetFloat("EditorWindowWidth", 300);
        height = EditorPrefs.GetFloat("EditorWindowHeight", 300);
        x = EditorPrefs.GetFloat("EditorWindowX", 100);
        y = EditorPrefs.GetFloat("EditorWindowY", 100);

        position = Rect(x, y, width, height);
    }
    function OnDestroy() {
        EditorPrefs.SetFloat("EditorWindowWidth", width);
        EditorPrefs.SetFloat("EditorWindowHeight", height);
        EditorPrefs.SetFloat("EditorWindowX", x);
        EditorPrefs.SetFloat("EditorWindowY", y);
    }
    function OnGUI() {
        if(GUILayout.Button("Close"))
            this.Close();
    }
}