利用matlab在picture中绘制的图形怎么刷新？

[ltq88]

    Dim i As Integer
    Dim X As Variant
    Dim Y As Variant
    Dim xx As Single
    Dim a As String
    Dim a1 As Variant
    a1 = vbaxes(Picture1.hWnd)
    Dim Sum As Integer
    a = "start"
    i = 0
    Open Text1.Text For Input As #1
    Do While Not EOF(1)
        i = i + 1
        Line Input #1, a
    Loop
    Close #1
    Sum = i
    X = zeros(Sum)
    Y = zeros(Sum)
    Open Text1.Text For Input As #1
    For i = 1 To Sum
        Line Input #1, a
        X(i) = Val(a)
    Next i
    Close #1
    Open Text2.Text For Input As #1
    For i = 1 To Sum
        Line Input #1, a
        Y(i) = Val(a)
    Next i
    Close #1
    Call plot(X, Y)

在上面这程序中，当改变导入的数据时，pictures中的图形会保持和第一次导入的数据绘制的图形一样。请问大虾们这是什么原因啊？

[贝隆]

不懂，帮顶

[zoumm]

请问楼主解决没有啊？我也是这个问题