MATLABBasisgrammatik

The behavior of the MATLAB environment is like a super complex calculator. You can enter commands at the >> command prompt.

MATLAB is an interpreted environment. In other words, you give a command and MATLAB executes the command immediately.

Hands-on practice

Enter a valid expression, such as,

5　+　5

Then press ENTER

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

ans =　10

Let's take a few more examples-

3　^　2	　　　　　　　%　3　raised to the power of　2

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

ans =　9

Another example,

sin(pi　/2) % sine of angle　90o

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

ans =　1

Another example,

7/0		　　　　　　% Divide by zero

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

ans = Inf
warning: division by zero

Another example,

732　*　20.3

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

ans =　　1.4860e+04

MATLAB provides some special expressions for certain mathematical symbols, such as pi representing π, Inf representing ∞, and i (and j) representing √-1et al.NanRepresents 'not a number'.

In MATLAB, use the semicolon (;)

The semicolon (;) indicates the end of a statement. However, if you want to hide and hide the MATLAB output of an expression, add a semicolon after the expression.

Zum Beispiel,

x =　3;
y = x　+　5

When you click the Execute button or type Ctrl + When E is reached, MATLAB will execute it immediately, and the returned result is-

y =　　8

Add comments

The percentage sign (%) is used to indicate comment lines. For example,

x =　9	　　　　　% Assign value9Assign to x

You can also use block comment operators %{ and %} to write comment blocks.

The MATLAB editor includes tools and context menu items that can help you add, delete, or change the format of comments.

Common operators and special characters

MATLAB supports the following common operators and special characters-

BesondereVariablenundKonstanten

MATLABunterstütztfolgendebesondereVariablenundKonstanten-

Benennen Sie Variablen

Der Variablenname besteht aus Buchstaben, gefolgt von beliebiger Anzahl von Buchstaben, Ziffern oder Unterstrichen.

MATLABist case-sensitive.

Der Variablenname kann beliebige Länge haben, aber MATLAB verwendet nur die ersten N Zeichen, wobei N von der Funktion angegeben wird namelengthmax.

Speichern - saveBefehl

saveBefehl speichert alle Variablen im Arbeitsbereich in einer Datei mit der Erweiterung .mat im aktuellen Verzeichnis.

Zum Beispiel,

save　myfile

Sie können ihn später jederzeit verwendenloadBefehl zum Neuladen der Datei.

load　myfile