# DataFrame.add

danfo.DataFrame.**add**(other, option)

| Parameters | Type                               | Description                                                                                                                                                                                  | Default                                              |   |
| ---------- | ---------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------- | - |
| other      | DataFrame, Series, Array or Scalar | Object to add with                                                                                                                                                                           |                                                      |   |
| option     | Object                             | <p>{</p><p><strong>axis</strong>: 0 for row, 1 for column.</p><p><strong>inplace</strong>: Boolean indicating whether to perform the operation inplace or not. Defaults to false</p><p>}</p> | <p>{</p><p>axis: 1,</p><p>inplace: false</p><p>}</p> |   |

## **Examples**

### Addition of **scalar to** DataFrame along default axis 1

{% tabs %}
{% tab title="Node" %}

```javascript
const dfd = require("danfojs-node")

let data = {
    "Col1": [10, 45, 56, 10],
    "Col2": [23, 20, 10, 24]
}
let df = new dfd.DataFrame(data)

let df_new = df.add(2)

df_new.print()
```

{% endtab %}

{% tab title="Browser" %}

```
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output" %}

```
╔═══╤═══════════════════╤═══════════════════╗
║   │ Col1              │ Col2              ║
╟───┼───────────────────┼───────────────────╢
║ 0 │ 12                │ 25                ║
╟───┼───────────────────┼───────────────────╢
║ 1 │ 47                │ 22                ║
╟───┼───────────────────┼───────────────────╢
║ 2 │ 58                │ 12                ║
╟───┼───────────────────┼───────────────────╢
║ 3 │ 12                │ 26                ║
╚═══╧═══════════════════╧═══════════════════╝
```

{% endtab %}
{% endtabs %}

### Addition of **Series to** DataFrame along axis 0

{% tabs %}
{% tab title="Node" %}

```javascript
const dfd = require("danfojs-node")

let data = {
    "Col1": [1, 4, 5, 1],
    "Col2": [3, 2, 0, 4]
}

let df = new dfd.DataFrame(data)
let sf = new dfd.Series([4, 5])

let df_new = df.add(sf, { axis: 1 })

df_new.print()
```

{% endtab %}

{% tab title="Browser" %}

```
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output" %}

```
╔═══╤═══════════════════╤═══════════════════╗
║   │ Col1              │ Col2              ║
╟───┼───────────────────┼───────────────────╢
║ 0 │ 5                 │ 8                 ║
╟───┼───────────────────┼───────────────────╢
║ 1 │ 8                 │ 7                 ║
╟───┼───────────────────┼───────────────────╢
║ 2 │ 9                 │ 5                 ║
╟───┼───────────────────┼───────────────────╢
║ 3 │ 5                 │ 9                 ║
╚═══╧═══════════════════╧═══════════════════╝
```

{% endtab %}
{% endtabs %}

### Addition of DataFrame to a DataFrame

{% tabs %}
{% tab title="Node" %}

```javascript
const dfd = require("danfojs")

let data = {"Col1": [1, 4, 5, 0], 
            "Col2": [2, 0, 1, 4]}
            
let data2 = {"new_col1": [1, 5, 20, 10],
             "new_Col2": [20, 2, 1, 2]}

let df = new dfd.DataFrame(data)
let df2 = new dfd.DataFrame(data2)

let df_new = df.add(df2)

df_new.print()
```

{% endtab %}

{% tab title="Browser" %}

```
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output" %}

```
╔═══╤═══════════════════╤═══════════════════╗
║   │ Col1              │ Col2              ║
╟───┼───────────────────┼───────────────────╢
║ 0 │ 2                 │ 22                ║
╟───┼───────────────────┼───────────────────╢
║ 1 │ 9                 │ 2                 ║
╟───┼───────────────────┼───────────────────╢
║ 2 │ 25                │ 2                 ║
╟───┼───────────────────┼───────────────────╢
║ 3 │ 10                │ 6                 ║
╚═══╧═══════════════════╧═══════════════════╝
```

{% endtab %}
{% endtabs %}

### Addition of Array to DataFrame along axis 0

{% tabs %}
{% tab title="Node" %}

```javascript
const dfd = require("danfojs-node")

let data = {
    "Col1": [10, 45, 56, 10],
    "Col2": [23, 20, 10, 24]
}

let df = new dfd.DataFrame(data)
let val = [2, 2, 2, 2]

let df_new = df.add(val, { axis: 0 })

df_new.print()
```

{% endtab %}

{% tab title="Browser" %}

```
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output" %}

```
╔════════════╤═══════════════════╤═══════════════════╗
║            │ Col1              │ Col2              ║
╟────────────┼───────────────────┼───────────────────╢
║ 0          │ 12                │ 25                ║
╟────────────┼───────────────────┼───────────────────╢
║ 1          │ 47                │ 22                ║
╟────────────┼───────────────────┼───────────────────╢
║ 2          │ 58                │ 12                ║
╟────────────┼───────────────────┼───────────────────╢
║ 3          │ 12                │ 26                ║
╚════════════╧═══════════════════╧═══════════════════╝
```

{% endtab %}
{% endtabs %}

### Addition works inplace

{% tabs %}
{% tab title="Node" %}

```javascript
const dfd = require("danfojs-node")

let data = {
    "Col1": [10, 45, 56, 10],
    "Col2": [23, 20, 10, 24]
}

let df = new dfd.DataFrame(data)
let val = [2, 2, 2, 2]

df.add(val, { axis: 0, inplace: true })

df.print()
```

{% endtab %}

{% tab title="Browser" %}

```
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output" %}

```
╔════════════╤═══════════════════╤═══════════════════╗
║            │ Col1              │ Col2              ║
╟────────────┼───────────────────┼───────────────────╢
║ 0          │ 12                │ 25                ║
╟────────────┼───────────────────┼───────────────────╢
║ 1          │ 47                │ 22                ║
╟────────────┼───────────────────┼───────────────────╢
║ 2          │ 58                │ 12                ║
╟────────────┼───────────────────┼───────────────────╢
║ 3          │ 12                │ 26                ║
╚════════════╧═══════════════════╧═══════════════════╝
```

{% endtab %}
{% endtabs %}


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