<｜begin▁of▁sentence｜>### Instruction:
As a choreographer, you might need to organize and track the size of the performance area when creating dance sequences and movements for different shows or productions. It's important to ensure that the convergence field size value is properly set and retrievable within a graph representing the performance space. If you're using NetworkX to model the performance space, you can work with the convergence field size value using the appropriate API methods provided by the library.
### Response:
import igraph as ig

# Create a new graph with 5 vertices
g = ig.Graph(edges=[(0, 1), (1, 2), (2, 3), (3, 4)])

# Set the convergence field size for the graph
convergence_size = 0.01
g['convergence_field_size'] = convergence_size

# Obtain the convergence field size of the graph
set_convergence_size = g['convergence_field_size']
print('Convergence Field Size:', set_convergence_size)
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