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Top Questions People Ask About Pandas, NumPy, Matplotlib & Scikit-learn — Answered!

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 Whether you're a beginner or brushing up on your skills, these are the real-world questions Python learners ask most about key libraries in data science. Let’s dive in! 🐍 🐼 Pandas: Data Manipulation Made Easy 1. How do I handle missing data in a DataFrame? df.fillna( 0 ) # Replace NaNs with 0 df.dropna() # Remove rows with NaNs df.isna(). sum () # Count missing values per column 2. How can I merge or join two DataFrames? pd.merge(df1, df2, on= 'id' , how= 'inner' ) # inner, left, right, outer 3. What is the difference between loc[] and iloc[] ? loc[] uses labels (e.g., column names) iloc[] uses integer positions df.loc[ 0 , 'name' ] # label-based df.iloc[ 0 , 1 ] # index-based 4. How do I group data and perform aggregation? df.groupby( 'category' )[ 'sales' ]. sum () 5. How can I convert a column to datetime format? df[ 'date' ] = pd.to_datetime(df[ 'date' ]) ...
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Social Media Jobs You need to look in

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Social media has transformed the way people socialize, network and stay in touch.
Social Media Jobs
Social Media Jobs
Social media is more than liking or retweeting a post; it's a new, cutting-edge marketing medium with unlimited potential. According to Constant Contact's Small Businesses: Then and Now Survey conducted in May 2013, social media marketing has exploded, with 87 percent of small businesses using social media as a marketing tool today.

Since social media marketing requires a combination of analytical skills, good communication and performing extensive research, you can bet business, communications and English-related degrees are good candidates for 2014 social media job openings.

Explore the new frontier of marketing with these six up-and-coming social media positions:
  1. Search engine optimization (SEO) specialist
  2. Social media strategist
  3. Online community manager
  4. Social media marketing manager
  5. Social media marketing coordinator
  6. Blogger or social media copywriter

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