使用Fit Analysis（擬合分析）
Fit選擇/導(dǎo)出
Fit Select/Export(擬合選擇/導(dǎo)出)窗口由一個(gè)階躍響應(yīng)曲線矩陣組成率翅，在圖表下方有一個(gè)圖例表。 單擊某個(gè)單元格以獲得該單元格輸入輸出關(guān)系對(duì)應(yīng)的Fit Stats（擬合統(tǒng)計(jì)數(shù)據(jù)）和整體輸出Fit Stats（擬合統(tǒng)計(jì)數(shù)據(jù)）鳍刷。Gain（增益）參數(shù)也顯示在此表中。
對(duì)每一對(duì)輸入-輸出關(guān)系慈鸠，可指定某個(gè)擬合結(jié)果作為該輸入-輸出對(duì)的模型蛔屹。你可以同時(shí)為多個(gè)關(guān)系執(zhí)行此操作。

• 白色：新（如果選中，將添加到目標(biāo)模型）只锻；
• 紅色：模型選項(xiàng)也存在玖像，如果選中，則將覆蓋目標(biāo)模型齐饮；
• 綠色：僅存在于目標(biāo)模型中捐寥，并且在模型合并后不會(huì)更改。

原文：
Using Fit Analysis
Fit Select/Export
The Fit Select/Export window consists of a matrix of step response plots with a legend table below the plots. Click on a cell to obtain the Fit Stats corresponding to the input-output relationship in that cell and the overall output Fit Stat. The Gain parameter is also shown in this table.
For each input-output relationship, designate a fit result as the model for that input-output pair. You can do this for multiple relationships simultaneously.
Fit Select/Export Window Fields
**Scaling: Options include Unit **and **Normalized **scaling.
With **Unit **scaling, each model step response corresponds to a unit step change in the input and each cell is scaled to span the entire range of the plotted step responses independently.
With **Normalized **scaling, each model step response corresponds to a step change value of Normal change. All the cells in the same column have the same scale and it will scaled for the largest positive and negative gains over the column.
Plot Time Steps: Plot the step responses up to this time (that is, the xaxis for each plot will be of the form 0 – Response time).
Model list: List of all models in the workspace. There is also a NEW MODEL option in this list. Selecting this option creates a new model with a default name that can be changed.
Add to Model Button: Click this button to add the fit group level model (created using Selections) to the model. You will be prompted with a dialog box to confirm the models being added to the target model.
Model Merge dialog shows the inputs and outputs from both models (source and target) and shows the applicable fit cells as check boxes. Individual model Cell is colored as follows:
— White: New (will be added to Target Model if checked)
— Red: Exist in both Models –Overwritten if checked
— Green: Exists in Target Model only and will not be changed after the model merge.
Right-click menu options similar to the model structure screen.
? Right-click - Fill Right
? Right-click - Fill Down
? Right-click - Fill All White Cells (Add only Models that do not exist in Target Models)
? Right-click - Fill All Red Cells (Overwrite existing models in Target Model)
If user un-checks a Input/Output cell on the Model Merge screen then it is not exported. If user re-checks a cell, it exports the same fit that was selected when the user opened the Model Merge dialog.
**Column Headings: **Outputs.
**Scale Factor: **If normalized scaling is selected, the scale factors for the inputs are displayed in a new column beside the input tag name. The scale factor is the normal change for the corresponding input/intermediate tag.
**Row Headings: **Inputs/Intermediates.
Legend
**Select: **For each input-output relationship, designate the model by selecting one of the fits in the analysis (by checking the box). Unassign a selected fit by unchecking a checked box.
Make a selection for multiple relationship by selecting multiple relationship cells. To do this, click the left mouse button on a cell, drag over a matrix of cells and release the mouse button. The selected cells display a different background color.
The step response of the selected fit is highlighted in a bolder line type.
Color: Double-click to modify the model plot line color.

2016.11.27