Documentation/OOoAuthors User Manual/Getting Started/Entering a formula
From Apache OpenOffice Wiki
- Entering a formula
- Customizations
- Formula layout
- Common problem areas
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Contents
Entering a formula
- There are three ways to enter a formula:
- Select a symbol from the Selection window.
- Right-click on the equation editor and select the symbol from the context menu.
- Type markup in the equation editor.
- The context menu and the Selection window insert the markup corresponding to a symbol. Incidentally, this provides a convenient way to learn the OOoMath markup.
Note | Click on the document body to exit the formula editor. Double-click on a formula to enter the formula editor again. |
The Selection window
- The simplest method for entering a formula is the Selection window, shown in Figure 2.
- inline:Frame6.png
- The Selection window is divided into two main portions.
- The top shows the symbol categories. Click on these to change the list of symbols.
- The bottom shows the symbols available in the current category.
TIP | You can hide (or unhide) the Selection window with View > Selection. |
Example 1:
- For this example we will enter a simple formula: inline:Object1.png On the Selection window:
- Select the top-left button of the categories (top) section (Figure 3).
- Click on the multiplication symbol (shown in Figure 3).
- inline:Frame2.png
- When you select the multiplication symbol on the Selection window, two things happen:
- The equation editor shows the markup: inline:Object59.png
- The body of the document shows a gray box with the figure: inline:Object58.png
- inline:Frame3.png
- The “ <?> " symbols (Figure 4) are placeholders that you can replace by other text. The equation will update automatically, and the result should resemble Figure 5.
- inline:Frame4.png
TIP | To keep the equation from updating automatically, select View > AutoUpdate display. To update a formula manually, press F9 or select View > Update. |
- Another way to access mathematical symbols is to right-click on the equation editor. This produces a menu as shown in Figure 6.
- inline:Frame8.png
Note | The entries in this menu correspond exactly to those in the Selection window. |
Markup
- You can type the markup directly in the equation editor. For example, you can type “5 times 4" to obtain inline:Object4.png . If you know the markup, this can be the fastest way to enter a formula.
TIP | As a mnemonic, the formula markup resembles the way the formula reads in English. |
- Below is a short list of common equations and their corresponding markup.
Display | Command | Display | Command | ||
inline:Object17.png | a = b | inline:Object27.png | sqrt {a} | ||
inline:Object18.png | a^2 | inline:Object19.png | a_n | ||
inline:Object23.png | int f(x) dx | inline:Object20.png | sum a_n | ||
inline:Object25.png | a <= b | inline:Object26.png | infinity | ||
inline:Object51.png | a times b | inline:Object53.png | x cdot y |
Greek characters
- Greek characters ( inline:Object5.png , etc) are common in mathematical formulas. These characters are not available in the selection box or the right-click menu. Fortunately, the markup for Greek characters is simple: Type a % sign followed the name of the character, in English.
- To type a lowercase character, write the name of the character in lowercase.
- To type an uppercase character, write the name of the character in uppercase.
- See the table below for some examples:
Lowercase | Uppercase | ||
%alpha inline:Object6.png | %ALPHA inline:Object10.png | ||
%beta inline:Object7.png | %BETA inline:Object11.png | ||
%gamma inline:Object8.png | %GAMMA inline:Object12.png | ||
%psi inline:Object9.png | %PSI inline:Object13.png | ||
%phi inline:Object3.png | %PHI inline:Object31.png | ||
%theta inline:Object32.png | %THETA inline:Object33.png |
Note | A complete table of Greek characters is included in page 23. |
- Another way to enter Greek characters is by using the catalog window. Go to Tools > Catalog. The catalog window is shown in Figure 7. Under “Symbol Set" select “Greek" and double-click on a Greek letter from the list.
- inline:Frame14.png
Example 2:
- For this example we will suppose that:
- We want to enter the above formula (the value of pi rounded to 5 decimal places).
- We know the name of the Greek character (“pi").
- But we do not know the markup associated with the inline:Object14.png symbol.
- Step 1: Type “%" followed by the text “pi". This displays the Greek character inline:Object15.png .
- Step 2: Open the Selection window (View > Selection).
- Step 3: The inline:Object29.png symbol is a relation, so we click on the relations button inline:Graphic8.png . If you hover the mouse over this button you see the tooltip “Relations" (Figure 8).
- inline:Frame9.png
- Step 4: Delete the <?> text and add “3.14159" at the end of the equation. Hence we end up with the markup “ %pi simeq 3.14159 ". The result is shown in Figure 9.
- inline:Frame10.png
Content on this page is licensed under the Creative Common Attribution 3.0 license (CC-BY). |