NumPy Basic: Exercises, Practice, Solution

NumPy Basic [59 exercises with solution]

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1. Get NumPy Version & Build Info

Write a Numpy program to get the Numpy version and show the Numpy build configuration.

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2. Help for NumPy Add Function

Write a NumPy program to get help with the add function.

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3. Test None are Zero

Write a NumPy program to test whether none of the elements of a given array are zero. 

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4. Test Any Non-Zero

Write a NumPy program to test if any of the elements of a given array are non-zero. 

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5. Test Finiteness of Elements

Write a NumPy program to test a given array element-wise for finiteness (not infinity or not a number).

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6. Test for Infinity

Write a NumPy program to test elements-wise for positive or negative infinity. 

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7. Test for NaN

Write a NumPy program to test element-wise for NaN of a given array.

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8. Test for Complex/Real/Scalar

Write a NumPy program to test element-wise for complex numbers, real numbers in a given array. Also test if a given number is of a scalar type or not. 

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9. Test Element-Wise Tolerance Equality

Write a NumPy program to test whether two arrays are element-wise equal within a tolerance.

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10. Element-Wise Comparison (Greater/Less)

Write a NumPy program to create an element-wise comparison (greater, greater_equal, less and less_equal) of two given arrays.

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11. Element-Wise Comparison (Equal/Tolerance)

Write a NumPy program to create an element-wise comparison (equal, equal within a tolerance) of two given arrays.

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12. Array Memory Size

Write a NumPy program to create an array with the values 1, 7, 13, 105 and determine the size of the memory occupied by the array.

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13. Create Array of Zeros, Ones, Fives

Write a NumPy program to create an array of 10 zeros, 10 ones, and 10 fives. 

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14. Create Array of Integers 30 to 70

Write a NumPy program to create an array of integers from 30 to 70.

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15. Create Array of Even Integers 30 to 70

Write a NumPy program to create an array of all even integers from 30 to 70.

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16. Create 3x3 Identity Matrix

Write a NumPy program to create a 3x3 identity matrix.

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17. Generate Random Number [0,1]

Write a NumPy program to generate a random number between 0 and 1.

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18. Generate Random Array from Standard Normal

Write a NumPy program to generate an array of 15 random numbers from a standard normal distribution.

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19. Vector 15-55 Without First/Last Values

Write a NumPy program to create a vector with values ranging from 15 to 55 and print all values except the first and last.

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20. Create and Iterate 3x4 Array

Write a NumPy program to create a 3X4 array and iterate over it.

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21. Create Vector of Evenly Spaced Values

Write a NumPy program to create a vector of length 10 with values evenly distributed between 5 and 50.

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22. Change Sign of Range 9-15

Write a NumPy program to create a vector with values from 0 to 20 and change the sign of the numbers in the range from 9 to 15.

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23. Vector of Random Integers [0,10]

Write a NumPy program to create a vector of length 5 filled with arbitrary integers from 0 to 10.

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24. Multiply Two Vectors

Write a NumPy program to multiply the values of two given vectors.

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25. Create 3x4 Matrix (10 to 21)

Write a NumPy program to create a 3x4 matrix filled with values from 10 to 21.

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26. Rows & Columns in Matrix

Write a NumPy program to find the number of rows and columns in a given matrix.

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27. Create 3x3 Identity Matrix

Write a NumPy program to create a 3x3 identity matrix, i.e. the diagonal elements are 1, the rest are 0.

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28. 10x10 Matrix Border 1, Inside 0

Write a NumPy program to create a 10x10 matrix, in which the elements on the borders will be equal to 1, and inside 0.

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29. Diagonal 5x5 Matrix (1-5)

Write a NumPy program to create a 5x5 zero matrix with elements on the main diagonal equal to 1, 2, 3, 4, 5.

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30. Staggered 4x4 Matrix (0,1)

Write a NumPy program to create a 4x4 matrix in which 0 and 1 are staggered, with zeros on the main diagonal.

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31. Create 3x3x3 Array of Values

Write a NumPy program to create a 3x3x3 array filled with arbitrary values.

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32. Compute Sums (All, Row, Column)

Write a NumPy program to compute the sum of all elements, the sum of each column and the sum of each row in a given array.

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33. Compute Inner Product of Vectors

Write a NumPy program to compute the inner product of two given vectors.

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34. Add Vector to Matrix Rows

Write a NumPy program to add a vector to each row of a given matrix.

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35. Save Array to Binary File

Write a NumPy program to save a given array to a binary file .

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36. Save Array and Load from Binary File

Write a NumPy program to save a given array to a binary file.

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37. Save and Load Array from Text File

Write a NumPy program to save a given array to a text file and load it.

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38. Convert Array to Bytes and Back

Write a NumPy program to convert a given array into bytes, and load it as an array.

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39. List to Array to List Comparison

Write a NumPy program to convert a given list into an array, then again convert it into a list. Check initial list and final list are equal or not.

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40. Sine Curve Coordinates with Plot

Write a NumPy program to compute the x and y coordinates for points on a sine curve and plot the points using matplotlib.

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41. Convert NumPy Dtypes to Python Types

Write a NumPy program to convert numpy dtypes to native Python types

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42. Add Elements Conditionally

Write a NumPy program to add elements to a matrix. If an element in the matrix is 0, we will not add the element below this element.

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43. Find Missing Data in Array

Write a NumPy program to find missing data in a given array.

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44. Compare Two Arrays (Element-Wise)

Write a NumPy program to check whether two arrays are equal (element wise) or not.

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45. Create 1D Array of Digits

Write a NumPy program to create a one-dimensional array of single, two and three-digit numbers.

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46. Create 2D Array of Specified Format

Write a NumPy program to create a two-dimensional array of a specified format.

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47. Create Array of Random Uniform [0,1]

Write a NumPy program to create a one-dimensional array of forty pseudo-randomly generated values. Select random numbers from a uniform distribution between 0 and 1.

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48. Random Normal Distribution 2D Array

Write a NumPy program to create a two-dimensional array with shape (8,5) of random numbers. Select random numbers from a normal distribution (200,7).

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49. Random Sampling with/without Replacement

Write a NumPy program to generate a uniform, non-uniform random sample from a given 1-D array with and without replacement.

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50. Swap Rows in 4x4 Random Array

Write a NumPy program to create a 4x4 array with random values. Create an array from the said array swapping first and last rows.

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51. Create Zero-Filled Array (5x6)

Write a NumPy program to create a new array of given shape (5,6) and type, filled with zeros.

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52. Sort Array by Rows & Columns

Write a NumPy program to sort a given array by row and column in ascending order.

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53. Extract Numbers Less/Greater Than Value

Write a NumPy program to extract all numbers from a given array less and greater than a specified number.

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54. Replace Numbers Based on Condition

Write a NumPy program to replace all numbers in a given array equal, less and greater than a given number.

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55. Create Array of Same Shape & Type

Write a NumPy program to create an array of equal shape and data type for a given array.

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56. Create 3D Array of Shape (3,5,4)

Write a NumPy program to create a three-dimensional array with the shape (3,5,4) and set it to a variable.

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57. Swap Columns in 4x4 Array

Write a NumPy program to create a 4x4 array. Create an array from said array by swapping first and last, second and third columns.

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58. Reverse Rows & Columns in Array

Write a NumPy program to swap rows and columns of a given array in reverse order.

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59. Element-Wise Multiply Two Arrays

Write a NumPy program to multiply two given arrays of the same size element-by-element.

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