### Introduction

In this tutorial, we’ll dive into the `matrix.columns()`

function in Pine Script, a powerful tool in the TradingView platform that allows traders and developers to create custom indicators and strategies. This function is particularly useful when working with matrix data structures, offering a straightforward way to retrieve the number of columns in a given matrix. Let’s explore its syntax, usage, and practical applications through an example.

### Syntax

The syntax for `matrix.columns()`

is:

matrix.columns(id) → series int

`id`

: This argument expects a matrix object, which is the matrix from which you want to find out the number of columns.

### Example

//@version=5 indicator("`matrix.columns()` Example") // Create a 2x6 matrix with values `0`. var m = matrix.new<int>(2, 6, 0) // Get the quantity of columns in matrix `m`. var x = matrix.columns(m) // Display using a label. if barstate.islastconfirmedhistory label.new(bar_index, high, "Columns: " + str.tostring(x) + "\n" + str.tostring(m))

### Example Explained

**Indicator Declaration**:Specifies that the script uses version 5 of Pine Script. This is necessary for compatibility and to access the latest features.`//@version=5`

:This line declares the script as an indicator and sets its name to “`indicator("`

matrix.columns()`Example")`

:`matrix.columns()`

Example”. Indicators are used to analyze and visualize data on TradingView charts.

**Matrix Creation**:A 2×6 matrix named`var m = matrix.new<int>(2, 6, 0)`

:`m`

is created and initialized with all elements set to`0`

. The`var`

keyword is used to declare`m`

as a variable that retains its value between chart bars. The matrix is of type integer (`<int>`

), with 2 rows and 6 columns.

**Retrieving the Number of Columns**:The number of columns in the matrix`var x = matrix.columns(m)`

:`m`

is retrieved using the`matrix.columns(m)`

function. The result is stored in the variable`x`

, which is also declared with`var`

to ensure its value is preserved across chart bars.

**Displaying the Result**:- The
`if`

condition`if barstate.islastconfirmedhistory`

checks if the script is processing the last confirmed historical bar. This is a common practice to avoid unnecessary computations or drawing objects multiple times. If the condition is true, a label is created at the current bar’s index (`label.new(bar_index, high, "Columns: " + str.tostring(x) + "\n" + str.tostring(m))`

:`bar_index`

) and at a vertical position equal to the`high`

price. The label displays the number of columns in the matrix (`x`

) and the matrix’s content as a string.`str.tostring()`

is used to convert the integer and matrix to string format for display.

- The

### Key Features and Takeaways

**Function Usability**:`matrix.columns()`

is invaluable for scripts that dynamically manipulate matrices, allowing developers to adapt their logic based on the matrix dimensions.**Syntax and Application**: The function requires a single argument, the matrix object, and returns an integer representing the number of columns. Its straightforward syntax makes it accessible even for beginners in Pine Script.**Practical Use Case**: Commonly used in strategies or indicators that involve complex data manipulation, such as statistical models or custom chart visualizations.

By incorporating `matrix.columns()`

into your Pine Script toolbox, you’ll enhance your ability to create dynamic and robust trading strategies and indicators. This function’s simplicity and utility make it a staple for anyone working with matrices in Pine Script.