Adjust script for weighted probabilities

2024-06-12 12:30 UTC gpt-4o Open in ChatGPT ↗

Please adjust this script so that there is a 70% chance that index 0 will be output:

import random

Initialize a global variable to store the previous index and value

if ‘prev_index’ not in globals(): prev_index = -1

if ‘prev_value’ not in globals(): prev_value = None

def valueChange(channel, sampleIndex, val, prev): global prev_index global prev_value

# Check if the value has actually changed
if val == prev_value:
    return

prev_value = val  # Update the previous value

# Create a list of possible indices
indices = [0, 1]

# Remove the previous index from the list
if prev_index in indices:
    indices.remove(prev_index)

# Shuffle the list and select a new index
random_index = random.choice(indices)

# Set the index of the switch1 CHOP
op('switch1').par.index = random_index
op('switch2').par.index = random_index

# Update the previous index
prev_index = random_index

# Debug statements to print the current and previous index
#print(f"Previous Index: {prev_index}, New Index: {random_index}, New Value: {val}")

return

Here is the adjusted script with a 70% chance for index 0 and a 30% chance for index 1 to be output:

import random

# Initialize a global variable to store the previous index and value
if 'prev_index' not in globals():
    prev_index = -1

if 'prev_value' not in globals():
    prev_value = None

def valueChange(channel, sampleIndex, val, prev):
    global prev_index
    global prev_value

    # Check if the value has actually changed
    if val == prev_value:
        return

    prev_value = val  # Update the previous value

    # Create a list of possible indices with weighted probabilities
    indices = [0, 0, 0, 0, 0, 0, 0, 1, 1, 1]  # 70% chance for 0, 30% chance for 1

    # Remove the previous index from the list
    if prev_index in indices:
        indices = [i for i in indices if i != prev_index]

    # Shuffle the list and select a new index
    random_index = random.choice(indices)

    # Set the index of the switch1 CHOP
    op('switch1').par.index = random_index
    op('switch2').par.index = random_index

    # Update the previous index
    prev_index = random_index

    # Debug statements to print the current and previous index
    #print(f"Previous Index: {prev_index}, New Index: {random_index}, New Value: {val}")

    return

Certainly! Here’s a more elegant version of the script that allows you to easily adjust the percentage chance by changing a single probability_index_0 variable:

import random

# Initialize a global variable to store the previous index and value
if 'prev_index' not in globals():
    prev_index = -1

if 'prev_value' not in globals():
    prev_value = None

# Probability of choosing index 0
probability_index_0 = 0.7

def valueChange(channel, sampleIndex, val, prev):
    global prev_index
    global prev_value

    # Check if the value has actually changed
    if val == prev_value:
        return

    prev_value = val  # Update the previous value

    # Determine the new index based on the probability
    if random.random() < probability_index_0:
        random_index = 0
    else:
        random_index = 1

    # Ensure the new index is different from the previous index
    if random_index == prev_index:
        random_index = 1 if random_index == 0 else 0

    # Set the index of the switch1 CHOP
    op('switch1').par.index = random_index
    op('switch2').par.index = random_index

    # Update the previous index
    prev_index = random_index

    # Debug statements to print the current and previous index
    #print(f"Previous Index: {prev_index}, New Index: {random_index}, New Value: {val}")

    return

With this version, you only need to adjust the probability_index_0 variable to change the percentage chance of selecting index 0. For example, set probability_index_0 = 0.8 for an 80% chance of selecting index 0.