Pandas scatter_matrix - plot categorical variables

Question

I am looking at the famous Titanic dataset from the Kaggle competition found here: http://www.kaggle.com/c/titanic-gettingStarted/data

I have loaded and processed the da

Answer 1

You need to transform the categorical variables into numbers to plot them.

Example (assuming that the column 'Sex' is holding the gender data, with 'M' for males & 'F' for females)

df['Sex_int'] = np.nan
df.loc[df['Sex'] == 'M', 'Sex_int'] = 0
df.loc[df['Sex'] == 'F', 'Sex_int'] = 1

Now all females are represented by 0 & males by 1. Unknown genders (if there are any) will be ignored.

The rest of your code should process the updated dataframe nicely.