# Mastering Cell Contents Assignment: A Comprehensive Guide to Non-Cell Array Objects

In this guide, we'll explore non-cell array objects, their manipulation, and delve into the different ways to assign contents to cells. With a step-by-step approach, we'll answer common questions and provide useful resources for working with cell arrays in MATLAB.

## Introduction to Non-Cell Array Objects

Non-cell array objects, such as numeric arrays, character arrays, and structure arrays, are essential data structures in MATLAB. They store and manipulate different types of data, making them vital for numerous applications.

1. Numeric Arrays: Store numeric values in a matrix or vector format. They can be of different types, such as `double`, `single`, `int8`, `int16`, `int32`, `int64`, `uint8`, `uint16`, `uint32`, and `uint64`.
2. Character Arrays: Store text and characters in an array format. They can be of variable length, and the elements can be accessed using array indexing.
3. Structure Arrays: Store diverse data types in a single array, where each element can have multiple fields with different data types.

## Creating and Manipulating Non-Cell Array Objects

In this section, we'll go through the steps to create and manipulate non-cell array objects.

#### Numeric Arrays

``````% Create a numeric array
A = [1, 2, 3; 4, 5, 6; 7, 8, 9]

% Access an element in the array
element = A(2, 3)

% Modify an element in the array
A(1, 2) = 10
``````

#### Character Arrays

``````% Create a character array
str = 'Hello world!'

% Access a character in the array
char = str(1)

% Modify a character in the array
str(1) = 'M'
``````

#### Structure Arrays

``````% Create a structure array
myStruct = struct('name', {'John', 'Jane'}, 'age', {30, 28})

% Access a field in the structure array
name = myStruct(1).name

% Modify a field in the structure array
myStruct(2).age = 29
``````

## Assigning Cell Contents

To assign contents to a cell, you can use different methods, such as cell assignment or content assignment.

#### Cell Assignment

``````% Create a cell array
C = {1, 2, 3; 4, 5, 6}

% Assign a new value to a cell
C{2, 3} = 7
``````

#### Content Assignment

``````% Create a cell array
C = {1, 2, 3; 4, 5, 6}

% Assign new content to a cell
C{2, 3}(:) = 7
``````

## Using Semicolon to Concatenate Arrays

The semicolon operator can be used to concatenate arrays vertically.

``````% Create two numeric arrays
A = [1, 2, 3]
B = [4, 5, 6]

% Concatenate the arrays vertically
C = [A; B]
``````

## FAQs

### How do I create an empty cell array in MATLAB?

``````% Create an empty cell array
emptyCellArray = {}
``````

### How can I concatenate cell arrays horizontally?

``````% Create two cell arrays
C1 = {1, 2, 3}
C2 = {4, 5, 6}

% Concatenate the cell arrays horizontally
C = [C1, C2]
``````

### How do I convert a cell array to a numeric array in MATLAB?

``````% Create a cell array
C = {1, 2, 3; 4, 5, 6}

% Convert the cell array to a numeric array
A = cell2mat(C)
``````

### How do I find the size of a cell array in MATLAB?

``````% Create a cell array
C = {1, 2, 3; 4, 5, 6}

% Find the size of the cell array
sz = size(C)
``````

### How do I access the contents of a cell array in MATLAB?

``````% Create a cell array
C = {1, 2, 3; 4, 5, 6}

% Access the contents of a cell
val = C{1, 2}
``````

For more information on working with MATLAB, refer to the official documentation.

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