Line plots with plot() in Pandas - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the plot() function in pandas?

The plot() function in pandas is used to create visual graphs, such as line plots, from data stored in DataFrames or Series. It helps to see trends and patterns easily.

beginner

How do you create a simple line plot from a pandas DataFrame?

Call df.plot() where df is your DataFrame. By default, it creates a line plot using the DataFrame's index for the x-axis and columns for the y-axis.

beginner

What does the kind parameter in plot() do?

The kind parameter tells pandas what type of plot to draw. For example, kind='line' makes a line plot. This is the default for plot().

intermediate

How can you add a title and labels to a line plot in pandas?

After creating the plot, use matplotlib functions like plt.title(), plt.xlabel(), and plt.ylabel() to add a title and axis labels.

beginner

What happens if your DataFrame has multiple columns and you call df.plot()?

Pandas will plot each column as a separate line on the same graph, using the DataFrame index as the x-axis.

What type of plot does df.plot() create by default?

A Scatter plot

B Bar plot

C Line plot

D Histogram

The default plot type for df.plot() is a line plot, which connects data points with lines.

Which library does pandas use under the hood to create plots?

A Matplotlib

B Seaborn

C Plotly

D Bokeh

Pandas uses Matplotlib internally to generate plots.

How do you specify a line plot explicitly using plot()?

A <code>df.plot(kind='line')</code>

B <code>df.plot(type='line')</code>

C <code>df.plot(style='line')</code>

D <code>df.plot(plot='line')</code>

The correct parameter is kind='line' to specify a line plot.

If you want to plot only one column from a DataFrame, what should you do?

A Use <code>df.plot(column='column_name')</code>

B Use <code>df.plot('column_name')</code>

C Use <code>df.plot(columns='column_name')</code>

D Use <code>df['column_name'].plot()</code>

Plotting a single column is done by selecting it first, then calling plot().

What does the x-axis represent in a pandas line plot by default?

A The DataFrame columns

B The DataFrame index

C The first column

D Random values

By default, the x-axis uses the DataFrame's index values.

Explain how to create a basic line plot from a pandas DataFrame and customize its title and axis labels.

Think about combining pandas plotting with matplotlib labeling.

Describe what happens when you call plot() on a DataFrame with multiple columns.

Consider how pandas handles multiple data series in one plot.