What commands are used to update statistical data?

In Python, commands that recalculate or update aggregated values based on new data are typically used to update statistical data. If it concerns database statistics, updates can be performed through SQL queries called from Python.

When it comes to statistical calculations in code, updates can occur using methods that add new data and recalculate statistics such as the mean, variance, etc.

An example of updating the mean value when new data arrives:

class RunningStats:
    def __init__(self):
        self.count = 0
        self.mean = 0.0

    def update(self, new_value):
        self.count += 1
        self.mean += (new_value - self.mean) / self.count

stats = RunningStats()
stats.update(10)
stats.update(20)
print(stats.mean)  # Will output the updated mean

If the question pertains to specific libraries, such as pandas, then updating statistics can be done by recalculating aggregates after adding new data.