Spreadsheet Workbench/zh-cn

电子表格工作台允许您创建和编辑电子表格、执行计算以及从模型中检索数据, 并将其数据导出到其他电子表格应用程序 (如 LibreOffice 或 Microsoft Excel).



支持的功能
电子表格提供以下需要一或两个参数的函数: abs, acos, asin, atan, atan2, cos, cosh, exp, log, log10, mod, pow, sin, sinh, sqrt, tan, tanh

三角函数使用角度作为它的默认单位; 提供 "rad" 允许使用弧度.

在 FreeCAD 中可用的额外函数: ceil, floor, trunc, 和 round

支持以下的集合函数：average, count, max, min, stddev, sum.

集合函数可以采用一个或多个参数, 用逗号或分号分隔. 参数可能包括范围 (由冒号分隔的两个单元格), 例如 "=average(B1: B8)"

常数 "pi" 和 "e" 是预定义的.

The conditional statement works like this: ''= condition ? resultTrue : resultFalse''

The condition is defined as an expression that evaluates to either 0 (for false) or non-zero for true. The following comparison operators are defined: ==, !=, >, <, >=, and <=.

Formulas are written as follows: =A2+A3

Noteː Cell-references have to be written with capital letters.

Reference To CAD-Data
It is possible to use data from the construction in the spreadsheet. The following table shows some examples assuming the model has a feature named "Cube" (note that this is the internal name of the feature, not the user assigned Label):

Cell Properties
The properties of a spreadsheet cell can be edited with a right-click on a cell. The following dialog pops up:



It has several tabs. The following properties can be changed:


 * Text color and background color
 * Text horizontal and vertical alignment
 * Text style: bold, italic, underline
 * Display unit for this cell. Please read the section below.
 * Define an alias-name for this cell. This alias-name can be used in cell formulas and also in FreeCADExpressions

The expressions are explained here: Expressions

Spreadsheet Data in Expressions
The usage of spreadsheet data in other parts of FreeCAD requires a fully defined name. Because it is possible to have more than one spreadsheet in a document, the spreadsheet name together with the cell name or alias is required. The following pictures showing the usage of an alias "number" from a spreadsheet "MySheet" in an expression in the PartDesign Workbench.

Typing an "M" shows a list of available names. The arrow-buttons allow to select "MySheet".



Typing an "n" shows now the list of available alias names in MySheet starting with "n". The "number" can be selected with the down-arrow-button. Once a valid name with a usable content is given, the result field will present the calculated length.



Units
The Spreadsheet uses units. If a number has a unit, this unit will be used in all calculations. The multiplication of two length with the unit mm gives an area with the unit mm&sup2;.

You can switch the length-unit from mm to inch in the dialog, you get with a right-click on a cell. The cell will now show the length in inches. The value used for calculations does not change. The results of a formula using this value do not change, when the shown unit of an input was changed. The result is still calculated from the length in mm.

A number without a unit cannot be changed in a number with unit by the cell properties dialog. One can put in a unit string, that will also be shown, but the cell still contains only a number without unit.

Sometime it is desirably to get rid of a unit. This can only to be done by multiplying with 1 with a reciprocal unit.

Importing and exporting
Sheets can be imported and exported to the csv format which can also be read and written by most other spreadsheet applications such as Microsoft Excel or LibreOffice Calc. When importing files into FreeCAD, the delimiter (the character that is used to separate columns) must be the TAB character (this can be set when exporting from other applications).

Spreadsheets in Excel-format "xlsx" can be imported into a FreeCAD document. Excel-spreadsheets can also be opened by FreeCAD. In this case a new document with a spreadsheet inside is created. Supported are the following features:


 * all functions that are also available in the FreeCAD spreadsheet. Other functions do give an error in the corresponding cell after the import.
 * Alias names for cells
 * More than one table in the Excel-sheet. In this case more FreeCAD spreadsheets are created.

Other functionality is not imported into the FreeCAD spreadsheet. The Excel-import is of FreeCAD.

Current Limitations
It is not possible providing data for a geometry, for example a length, in a spreadsheet and retrieving in the same spreadsheet the volume of the resulting shape. This will create a circular reference. This is a design decision. However, it is possible to use two different spreadsheets: one as data-source for geometry and another for reporting geometry-data.

It is not possible to select and copy multiple cells. Only the content of a cell from the input field can be copied and paste into the input field of another cell.

For FreeCAD earlier versions see Spreadsheet legacy