簡介：FRED作為COM組件可以實現與Excel、VB、Matlab等調用來完成龐大的計算任務或畫圖，本文的目的是通過運行一個案例來實現與Matlab的相互調用，在此我們需要借助腳本來完成，此腳本為視為通用型腳本。
配置：在執行調用之前，我們需要在Matlab命令行窗口輸入如下命令：
enableservice('AutomationServer', true)
enableservice('AutomationServer')
結果輸出為1，這種操作方式保證了當前的Matlab實體可以用于通信。
在winwrp界面，為增加和使用Matlab類型的目錄庫，我們需要如下步驟：
1. 在FRED腳本編輯界面找到參考.
2. 找到Matlab Automation Server Type Library
3. 將名字改為MLAPP
在Matlab里面有兩種常用的數據發送選項PutWorkspaceData 及PutFullMatrix，PutWorkspaceData適用于存儲一般的數據在工作區，并賦予其為變量，PutFullMatrix試用于復數數據。
圖 編輯/參考
現在將腳本代碼公布如下，此腳本執行如下幾個步驟：
1. 創建Matlab服務器。
2. 移動探測面對于前一聚焦面的位置。
3. 在探測面追跡光線
4. 在探測面計算照度
5. 使用PutWorkspaceData發送照度數據到Matlab
6. 使用PutFullMatrix發送標量場數據到Matlab中
7. 用Matlab畫出照度數據
8. 在Matlab計算照度平均值
9. 返回數據到FRED中
代碼分享：
Option Explicit
Sub Main
Dim ana As T_ANALYSIS
Dim move As T_OPERATION
Dim Matlab As MLApp.MLApp
Dim detNode As Long, detSurfNode As Long, anaSurfNode As Long
Dim raysUsed As Long, nXpx As Long, nYpx As Long
Dim irrad() As Double, imagData() As Double, reals() As Double, imags() As Double
Dim z As Double, xMin As Double, xMax As Double, yMin As Double, yMax As Double
Dim meanVal As Variant
Set Matlab = CreateObject("Matlab.Application")
ClearOutputWindow
'Find the node numbers for the entities being used.
detNode = FindFullName("Geometry.Screen")
detSurfNode = FindFullName("Geometry.Screen.Surf 1")
anaSurfNode = FindFullName("Analysis Surface(s).Analysis 1")
'Load the properties of the analysis surface being used.
LoadAnalysis anaSurfNode, ana
'Move the detector custom element to the desired z position.
z = 50
GetOperation detNode,1,move
move.Type = "Shift"
move.val3 = z
SetOperation detNode,1,move
Print "New screen position, z = " &z
'Update the model and trace rays.
EnableTextPrinting (False)
Update
DeleteRays
TraceCreateDraw
EnableTextPrinting (True)
'Calculate the irradiance for rays on the detector surface.
raysUsed = Irradiance( detSurfNode, -1, ana, irrad )
Print raysUsed & " rays were included in the irradiance calculation.
'When using real number data to send to MATLAB, it is simplest to use PutWorkspaceData.
Matlab.PutWorkspaceData("irradiance_pwd","base",irrad)
'PutFullMatrix is more useful when actually having complex data such as with
'scalar wavefield, for example. Note that the scalarfield array in MATLAB
'is a complex valued array.
raysUsed = ScalarField ( detSurfNode, -1, ana, reals, imags )
Matlab.PutFullMatrix("scalarfield","base", reals, imags )
Print raysUsed & " rays were included in the scalar field calculation."
'Calculate plot characteristics from the T_ANALYSIS structure. This information is used
'to customize the plot figure.
xMin = ana.posX+ana.AcellX*(ana.Amin-0.5)
xMax = ana.posX+ana.AcellX*(ana.Amax+0.5)
yMin = ana.posY+ana.BcellY*(ana.Bmin-0.5)
yMax = ana.posY+ana.BcellY*(ana.Bmax+0.5)
nXpx = ana.Amax-ana.Amin+1
nYpx = ana.Bmax-ana.Bmin+1
'Plot the data in Matlab with some parameters calculated from the T_ANALYSIS
'structure. Set the axes labels, title, colorbar and plot view.
Matlab.Execute( "figure; surf(linspace("&xMin &","&xMax &","&nXpx &"),linspace("& yMin &"," & yMax & "," & nYpx & "),irradiance_pwd, 'EdgeColor', 'None');" )
Matlab.Execute( "xlabel('X Position (" & GetUnits() & ")')" ) : Matlab.Execute( "ylabel('Y Position (" & GetUnits() & ")')" ) : Matlab.Execute( "zLabel( 'Irradiance' )" )
Matlab.Execute( "title('Detector Irradiance')" )
Matlab.Execute( "colorbar" )
Matlab.Execute( "view(2)" )
Print ""
Print "Matlab figure plotted..."
'Have Matlab calculate and return the mean value.
Matlab.Execute( "irrad = mean(mean(irradiance_pwd));" )
Matlab.GetWorkspaceData( "irrad", "base", meanVal )
Print "The mean irradiance value calculated by Matlab is: " & meanVal
'Release resources
Set Matlab = Nothing
End Sub
最后在Matlab畫圖如下：
并在工作區保存了數據：
并返回平均值：
與FRED中計算的照度圖對比：
例：
此例系統數據，可按照此數據建立模型
系統數據
光源數據：
Type: Laser Beam(Gaussian 00 mode)
Beam size: 5；
Grid size: 12；
Sample pts: 100；
相干光；
波長0.5876微米，
距離原點沿著Z軸負方向25mm。
對于執行代碼，如果想保存圖片，請在開始之前一定要執行如下代碼：
enableservice('AutomationServer', true)
enableservice('AutomationServer')
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