How to convert string entries in pandas dataframe to integers?

Question

The pandas data frame that I was working with has a column with string entries and I wish to convert it to integers.

The column is called diagnosis and each row has a value of either M or B. I wanted to convert all M to 1 and all B to 0 with the following code

for row in data['diagnosis']:
  if row == 'M':
    row = 1
  else:
    row = 0

But it does not change anything?

fmarm · Accepted Answer · 2020-05-18 01:00:59Z

2

You can use map to do this

data['diagnosis'] = data['diagnosis'].map({'M':1,'B':0})

answered May 18, 2020 at 1:00

fmarm

4,2741 gold badge20 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to convert string entries in pandas dataframe to integers?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related