Python dataframe to array
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Write a python code to create a dataframe using Series() function with appropriate headings such as Rollno, name and percentage from the list given below: ... Write a python program to create a 3 X 3 numpy array having random numbers from 12 to 20. replace all the odd numbers by 0.3. Ans:import numpy as np. import random as rd.
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Create an 3x2 array and perform the following operations using python operations: Calculate remainder of all elements when divided by 4 . Multiplication of all the elements with 8. Adding 17 to array. Answer: import numpy as np. import math. a= np.array([[10,12],[2,13],[9,21]]) print(a%4) print(a*8) print(a+17) (1 mark for each part) 3 (1 mark ...
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2. Python | Pandas DataFrame. Pandas DataFrame is two-dimensional size-mutable, potentially heterogeneous tabular data structure with labeled axes (rows and columns). A Data frame is a two-dimensional data structure, i.e., data is aligned in a tabular fashion in rows and columns.
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Write python statement to create a one –dimensional array using arrange() function .Elements will be in the range 10 to 30 with a step of 4 (including both 10 and 30). Reshape this one-dimensional array to two dimensional array of shape(2,3). Then display only those elements of this two –dimensional array which are divisible by 5.
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Q.4 Why does python change the datatype of a column as soon as it stores an empty value(NaN) even though it has all other values stored as integer. Q.5 Write code statements to list the following, from a dataframe namely sales.
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Write statements to change 4th and 8th elements of this array to 5 and 87. 2. g) Write a NumPy program to find the number of elements of an array, length of one array element in bytes and total bytes consumed by the elements. 3. Answer the following questions. 2. a) _ method in Pandas can be used to change the label of rows and columns of a ...
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Write a NumPy program to find the number of elements of an array, length of one array element in bytes and total bytes consumed by the elements 3 import as np = .array([1,2,3], dtype=np.float64)
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(ii)Write the python code to read the contents of “first.csv” file consisting of data from a mysql table and print data of table on the screen in tabular form of table. Ans.import mysql.connector Mydb=mysql.connector.connect(host=”localhost”,user=”root”,passwd=”123”,
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If you are running Python 2.x, filter should be changed to filters on the second line. import numpy as np. from skimage import io, color, filter. ... Use this modified mydata array to create a DataFrame like was done in Problem #6. Create the following two tables using this DataFrame.
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OF DATAFRAME AND NUMPY. Q1. What is Dataframe? Ans. _____ _____ _____. Q2.Which library of python contain the Dataframe. Ans._____. Q3.Name the function that is used to create the array of given shape filled with one.
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