# numel

Number of array elements

## Description

example

````n = numel(A)` returns the number of elements, `n`, in array `A`, equivalent to `prod(size(A))`.```

## Examples

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### Number of Elements in 3-D Matrix

Create a 4-by-4-by-2 matrix.

```A = magic(4); A(:,:,2) = A'```
```A(:,:,1) = 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 A(:,:,2) = 16 5 9 4 2 11 7 14 3 10 6 15 13 8 12 1 ```

`numel` counts 32 elements in the matrix.

```n = numel(A) ```
```n = 32```

### Number of Elements in Cell Array of Strings

Create a cell array of strings.

```A = {'dog','cat','fish','horse'}; ```

`numel` counts 4 string elements in the array.

```n = numel(A) ```
```n = 4```

### Number of Elements in Table

Create a table with four variables listing patient information for five people.

```LastName = {'Smith';'Johnson';'Williams';'Jones';'Brown'}; Age = [38;43;38;40;49]; Height = [71;69;64;67;64]; Weight = [176;163;131;133;119]; BloodPressure = [124 93; 109 77; 125 83; 117 75; 122 80]; A = table(Age,Height,Weight,BloodPressure,'RowNames',LastName)```
```A = Age Height Weight BloodPressure --- ------ ------ --------------- Smith 38 71 176 124 93 Johnson 43 69 163 109 77 Williams 38 64 131 125 83 Jones 40 67 133 117 75 Brown 49 64 119 122 80```

Find the number of elements in the table.

`n = numel(A)`
```n = 20```

`numel` returns a value equivalent to `prod(size(A))` corresponding to the 5 rows and 4 variables.

## Input Arguments

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### `A` — Input arrayscalar | vector | matrix | multidimensional array

Input array, specified as a scalar, vector, matrix, or multidimensional array. This includes numeric arrays, logical arrays, character arrays, categorical arrays, datetime arrays, duration arrays, calendarDuration arrays, tables, structure arrays, cell arrays, and object arrays.

## Limitations

• If `A` is a table, `numel` returns the number of elements in the table, `A`, equivalent to `prod(size(A))`. Variables in a table can have multiple columns, but `numel(A)` only accounts for the number of rows and number of variables.