pages/3_NumpyBasics.py

import streamlit as st
import numpy as np

# Example functions
def example1():
    code = "import numpy as np"
    exec(code)
    return code

def example2():
    code = "array = np.array([1, 2, 3, 4, 5])\narray"
    array = np.array([1, 2, 3, 4, 5])
    return code, array

def example3():
    code = "array = np.arange(10)\narray"
    array = np.arange(10)
    return code, array

def example4():
    code = "array = np.linspace(0, 1, 5)\narray"
    array = np.linspace(0, 1, 5)
    return code, array

def example5():
    code = "array = np.array([[1, 2, 3], [4, 5, 6]])\nreshaped_array = array.reshape((3, 2))\nreshaped_array"
    array = np.array([[1, 2, 3], [4, 5, 6]])
    reshaped_array = array.reshape((3, 2))
    return code, reshaped_array

def example6():
    code = "array = np.array([1, 2, 3, 4, 5])\narray[1:4]"
    array = np.array([1, 2, 3, 4, 5])
    sliced_array = array[1:4]
    return code, sliced_array

def example7():
    code = "array = np.array([[1, 2], [3, 4], [5, 6]])\nfancy_indexed_array = array[[0, 1], [1, 0]]\nfancy_indexed_array"
    array = np.array([[1, 2], [3, 4], [5, 6]])
    fancy_indexed_array = array[[0, 1], [1, 0]]
    return code, fancy_indexed_array

def example8():
    code = "array = np.array([1, 2, 3, 4, 5])\nboolean_indexed_array = array[array > 3]\nboolean_indexed_array"
    array = np.array([1, 2, 3, 4, 5])
    boolean_indexed_array = array[array > 3]
    return code, boolean_indexed_array

def example9():
    code = "array = np.array([1, 2, 3, 4, 5])\narray * 2"
    array = np.array([1, 2, 3, 4, 5])
    result = array * 2
    return code, result

def example10():
    code = "array = np.array([[1, 2, 3], [4, 5, 6]])\nnp.sum(array)"
    array = np.array([[1, 2, 3], [4, 5, 6]])
    result = np.sum(array)
    return code, result

def example11():
    code = "matrix = np.array([[1, 2], [3, 4]])\nnp.dot(matrix, matrix)"
    matrix = np.array([[1, 2], [3, 4]])
    result = np.dot(matrix, matrix)
    return code, result

def example12():
    code = "array = np.array([1, 2, 3])\narray + np.array([4, 5, 6])"
    array = np.array([1, 2, 3])
    result = array + np.array([4, 5, 6])
    return code, result

def example13():
    code = "random_array = np.random.random((2, 2))\nrandom_array"
    random_array = np.random.random((2, 2))
    return code, random_array

def example14():
    code = "array = np.array([3, 1, 2])\nnp.sort(array)"
    array = np.array([3, 1, 2])
    sorted_array = np.sort(array)
    return code, sorted_array

def example15():
    code = "array = np.array([1, 2, 3, 4, 5])\nnp.searchsorted(array, 3)"
    array = np.array([1, 2, 3, 4, 5])
    index = np.searchsorted(array, 3)
    return code, index

def example16():
    from skimage import data
    code = "from skimage import data\nimage = data.camera()\nnp.mean(image)"
    image = data.camera()
    mean_value = np.mean(image)
    return code, mean_value

def example17():
    code = "positions = np.random.random((10, 2))\nvelocities = np.random.random((10, 2))\npositions + velocities"
    positions = np.random.random((10, 2))
    velocities = np.random.random((10, 2))
    result = positions + velocities
    return code, result

def example18():
    code = "data = np.random.random((100, 4))\nnp.mean(data, axis=0)"
    data = np.random.random((100, 4))
    mean_values = np.mean(data, axis=0)
    return code, mean_values

def example19():
    code = "array = np.array([1, 2, 3])\nnp.power(array, 3)"
    array = np.array([1, 2, 3])
    result = np.power(array, 3)
    return code, result

def example20():
    code = "array = np.array([1, 2, 3, 4, 5])\nnp.cumsum(array)"
    array = np.array([1, 2, 3, 4, 5])
    result = np.cumsum(array)
    return code, result

examples = [
    ("Example 1: Import NumPy", example1),
    ("Example 2: Create a simple array", example2),
    ("Example 3: Create an array with a range of values", example3),
    ("Example 4: Create an array with evenly spaced values using linspace", example4),
    ("Example 5: Reshape a 2D array", example5),
    ("Example 6: Slice a 1D array", example6),
    ("Example 7: Fancy indexing on a 2D array", example7),
    ("Example 8: Boolean indexing on a 1D array", example8),
    ("Example 9: Element-wise multiplication", example9),
    ("Example 10: Sum of all elements in a 2D array", example10),
    ("Example 11: Dot product of two matrices", example11),
    ("Example 12: Broadcasting example", example12),
    ("Example 13: Generate random numbers", example13),
    ("Example 14: Sort an array", example14),
    ("Example 15: Search for a value in a sorted array", example15),
    ("Example 16: Mean value of an image", example16),
    ("Example 17: Numerical simulation with random positions and velocities", example17),
    ("Example 18: Mean of each column in a 2D array", example18),
    ("Example 19: Element-wise power", example19),
    ("Example 20: Cumulative sum of an array", example20),
]

st.title("NumPy Course with Streamlit")

for title, func in examples:
    st.header(title)
    if st.button(f"Run {title.split(':')[0]}"):
        code, result = func()
        st.code(code)
        st.write("Output:", result)