## Introduction

A `DataFrame`

is a data structure that represents a special kind of **two-dimensional array**, built on top of multiple `Series`

objects. These are the central data structures of Pandas - an extremely popular and powerful data analysis framework for Python.

**Advice:** If you're not already familiar with DataFrames and how they work, read our Guide to DataFrames.

DataFrames have the ability to give a name to rows and/or columns, and in a sense, **represent tables**.

Let's import Pandas and create a `DataFrame`

from a dictionary:

```
import pandas as pd
df_data = {
"column1": [24, 9, 20, 24],
"column2": [17, 16, 201, 16]
}
df = pd.DataFrame(df_data)
print(df)
```

Pandas has a great integration with Python and we can easily create DataFrames from dictionaries. The `df`

we've constructed now contains the columns and their respective values:

```
column1 column2
0 24 17
1 9 16
2 20 201
3 24 16
```

Each column has a list of elements, and we can search for the maximum element of each *column*, each *row* *or* the entire `DataFrame`

.

### Find Maximum Element in Pandas DataFrame's Column

To find the maximum element of *each* column, we call the `max()`

method of the `DataFrame`

class, which returns a `Series`

of column names and their largest values:

```
max_elements = df.max()
print(max_elements)
```

This will give us the max value for each column of our `df`

, as expected:

```
column1 24
column2 201
dtype: int64
```

However, to find the `max()`

element of a single column, you first isolate it and call the `max()`

method on that specific `Series`

:

```
max_element = df['column1'].max()
print(max_element)
```

```
24
```

### Find Maximum Element in Pandas DataFrame's Row

Finding **the max element of each DataFrame row** relies on the `max()`

method as well, but we set the `axis`

argument to `1`

.

The default value for the

`axis`

argument is 0. If the`axis`

equals to 0, the`max()`

method will find the max element of each column. On the other hand, if the`axis`

equals to 1, the`max()`

will find the max element of each row.

```
max_elements = df.max(axis=1)
print(max_elements)
```

This will give us the max value for each row of our `df`

, as expected:

```
0 24
1 16
2 201
3 24
dtype: int64
```

Alternatively, if you'd like to search through a specific row, you can access it via `iloc[]`

:

```
print(df)
for row in df.index:
print(f'Max element of row {row} is:', max(df.iloc[row]))
```

We've printed the `df`

for reference to make it easier to verify the results, and obtained the `max()`

element of each row, obtained through `iloc[]`

:

```
column1 column2
0 24 17
1 9 16
2 20 201
3 24 16
Max element of row 0 is: 24
Max element of row 1 is: 16
Max element of row 2 is: 201
Max element of row 3 is: 24
```

### Find Maximum Element in Entire Pandas DataFrame

Finally, we can take a look at how to **find the max element in an entire DataFrame.**

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Based on what we've previously seen, this should be pretty simple. We'll just use the built-in `max()`

method and pass it one of two previously created lists of max elements - either for all rows or all columns. These are two facets of the same data, so the same result is guaranteed.

This should give us a single highest value in the entire `df`

:

```
max_by_columns = df.max()
max_by_rows = df.max(axis=1)
df_max = max(max_by_columns)
print("Max element based on the list of columns: ", df_max)
df_max2 = max(max_by_rows)
print("Max element based on the list of rows: ", df_max2)
```

This will output:

```
Max element based on the list of columns: 201
Max element based on the list of rows: 201
```

This is both expected and correct! The max element of a list of max elements of each row should be the same as the max element of a list of max elements of each column and both of them should be the same as the **max element of the entire DataFrame**.

## Conclusion

In this short tutorial, we've taken a look at how to find the maximum element of a Pandas DataFrame, for columns, rows and the entire DataFrame instance.