# How to Create a Correlation Matrix using Pandas

In this short guide, I’ll show you how to create a Correlation Matrix using Pandas. I’ll also review the steps to display the matrix using Seaborn and Matplotlib.

To start, here is a template that you can apply in order to create a correlation matrix using pandas:

```df.corr()
```

Next, I’ll show you an example with the steps to create a correlation matrix for a given dataset.

## Steps to Create a Correlation Matrix using Pandas

### Step 1: Collect the Data

Firstly, collect the data that will be used for the correlation matrix.

For example, I collected the following data about 3 variables:

 A B C 45 38 10 37 31 15 42 26 17 35 28 21 39 33 12

### Step 2: Create a DataFrame using Pandas

Next, create a DataFrame in order to capture the above dataset in Python:

```import pandas as pd

data = {'A': [45,37,42,35,39],
'B': [38,31,26,28,33],
'C': [10,15,17,21,12]
}

df = pd.DataFrame(data,columns=['A','B','C'])
print (df)
```

Once you run the code, you’ll get the following DataFrame: ### Step 3: Create a Correlation Matrix using Pandas

Now, create a correlation matrix using this template:

```df.corr()
```

This is the complete Python code that you can use to create the correlation matrix for our example:

```import pandas as pd

data = {'A': [45,37,42,35,39],
'B': [38,31,26,28,33],
'C': [10,15,17,21,12]
}

df = pd.DataFrame(data,columns=['A','B','C'])

corrMatrix = df.corr()
print (corrMatrix)
```

Run the code in Python, and you’ll get the following matrix: ### Step 4 (optional): Get a Visual Representation of the Correlation Matrix using Seaborn and Matplotlib

You can use the seaborn and matplotlib packages in order to get a visual representation of the correlation matrix.

First import the seaborn and matplotlib packages:

```import seaborn as sn
import matplotlib.pyplot as plt
```

Then, add the following syntax at the bottom of the code:

```sn.heatmap(corrMatrix, annot=True)
plt.show()
```

So the complete Python code would look like this:

```import pandas as pd
import seaborn as sn
import matplotlib.pyplot as plt

data = {'A': [45,37,42,35,39],
'B': [38,31,26,28,33],
'C': [10,15,17,21,12]
}

df = pd.DataFrame(data,columns=['A','B','C'])

corrMatrix = df.corr()
sn.heatmap(corrMatrix, annot=True)
plt.show()
```

Run the code, and you’ll get the following correlation matrix: That’s it! You may also want to review the following source that explains the steps to create a Confusion Matrix using Python. Alternatively, you may check this guide about creating a Covariance Matrix in Python.