For all problems, include one or two examples to demonstrate that your function works as intended. For all functions, include code that checks whether the arguments satisfy the specifications in the problem. If not, the code should throw an error with a meaningful error code. Code up the algorithm yourself whenever possible. For example, you should implement the forward solving algorithm instead of calling forwardsolve 1. Write a function that takes in a 'n' by `n` lower triangular matrix `L`, and an `n by 1 vector `b`, and returns the solution to 'L x = b`. 2. Write a function that takes in a `n by `n` upper triangular matrix U`, and an `n` by 1 vector b`, and returns the solution to 'U x = b`. 3. Write a function that takes in an `n by `n matrix A and returns the lower triangular matrix `L` such that `A = L LAT`. If the calculation fails because you cannot take the square root of a negative number, your function should return the current upper-left corner of Land print a warning message.

For all problems, include one or two examples to demonstrate that your function works as intended. For all functions, include code that checks whether the arguments satisfy the specifications in the problem. If not, the code should throw an error with a meaningful error code. Code up the algorithm yourself whenever possible. For example, you should implement the forward solving algorithm instead of calling forwardsolve 1. Write a function that takes in a 'n' by `n` lower triangular matrix `L`, and an `n by 1 vector `b`, and returns the solution to 'L x = b`. 2. Write a function that takes in a `n by `n` upper triangular matrix U`, and an `n` by 1 vector b`, and returns the solution to 'U x = b`. 3. Write a function that takes in an `n by `n matrix A and returns the lower triangular matrix `L` such that `A = L LAT`. If the calculation fails because you cannot take the square root of a negative number, your function should return the current upper-left corner of Land print a warning message.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Bartleby answered my homework and Write a function called has_duplicates that takes a string parameter and returns True if the string has any repeated characters. Otherwise, it should return False. Implement has_duplicates by creating a histogram using the histogram function above. Do not use any of the implementations of has_duplicates that are given in your textbook. Instead, your implementation should use the counts in the histogram to decide if there are any duplicates. Write a loop over the strings in the provided test_dups list. Print each string in the list and whether or not it has any duplicates based on the return value of has_duplicates for that string. For example, the output for "aaa" and "abc" would be the following. aaa has duplicatesabc has no duplicates Print a line like one of the above for each of the strings in test_dups. True needs to be defined. I tried to code it but didn't accept and got an error message.
Going missing Some calculations involving blank values may give different results to what you might expect. For example, when you pass a blank value into the AND() function, it is treated as TRUE. This is often unhelpful. To make blanks behave in a sensible way in calculations, you must first convert them to be "not available" using NA(). This function takes no inputs, and returns a missing value. To convert a blank value to a missing value, use this pattern. =IF(ISBLANK(cell), NA(), cell) Instruction In column H, use AND() to find women who have kids and get benefits. In column I, convert the blanks in column G to missing values. In column J, again find women who have kids and get benefits, this time using column I rather than G. please show the formula used to "has kids and gets benefits" , "gets benefits with missing values", has kids and gets benefits". Thank you Is non-white Has over 12 years of school? Is married? Has kids? Has young kids? Is head of household? Gets…
The dangerous function below throws an error if it is given a certain integer number a. That is, the function crashes when it's run, rather than simply returning a wrong answer. Your task is to find the error. Firstly you need to consider which lines of the function could cause a crash. Certainly the line x = z + a Would crash if a is non-numeric. However, let's assume that's not the case and the function has been called with an integer a. Now: what else could cause an error? When you've figured that out, all you have to do is work out what the value of a must have been. def dangerous(a): 9302648 X = z + a return a // x Enter an integer value a into the answer box below that causes the function to crash. Enter just that number, no extra characters. (Remember that to test your answer in Wing, you will need to call the dangerous function with the value of a you want to test.)
Could you solve this Question please? Write a function called has_duplicates that takes a string parameter and returns True if the string has any repeated characters. Otherwise, it should return False. Implement has_duplicates by creating a histogram using the histogram function above. Do not use any of the implementations of has_duplicates that are given in your textbook. Instead, your implementation should use the counts in the histogram to decide if there are any duplicates. Write a loop over the strings in the provided test_dups list. Print each string in the list and whether or not it has any duplicates based on the return value of has_duplicates for that string. For example, the output for "aaa" and "abc" would be the following. aaa has duplicatesabc has no duplicates Print a line like one of the above for each of the strings in test_dups. Obs:Copy the code below into your program def histogram(s): d = dict() for c in s: if c not in d: d[c] =…
Answer the given question with a proper explanation and step-by-step solution. Below is your function add(t) from 6.4 which adds all items in the tuple t and returns the result. This function is unprotected and will fail whenever the tuple t contains an item that is not a number. Run the program to see it. Protect your function with the try-except statement! If for whatever reason the addition fails, display the error message and return None. Do not change the main program. Expected output: Tuple of values: (1, 'two', 3)unsupported operand type(s) for +=: 'int' and 'str'Sum of the values: None def add(t):"""Adds all values in the tuple t""" result = 0 for x in t:result += x return result # Main program (do not change):values = (1, 'two', 3)print("Tuple of values:", values)print("Sum of the values:", add(values))
Please answer it in Python Write a function double_consonnant that takes as an argument a word and has two return values: a Boolean worth True if the word contains a double consonant (twice the same consonant in a row), and in this case the second return value is the consonant that is doubled; if there is no doubled consonant, the function must return False and None. If the word contains several double consonants (for example, 'successor'), true will be returned and the first double consonant appearing in the word. Examples: double_consonne('arrivee') is true, 'r'. double_consonne (‘bonbon’) is false, None double_consonne('appelle') is True, 'p'
Create a function that takes a grid of # and -, where each hash (#) represents amine and each dash (-) represents a mine-free spot.Return a grid, where each dash is replaced by a digit, indicating the number ofmines immediately adjacent to the spot i.e. (horizontally, vertically, anddiagonally).Example of an input:[ ["-", "-", "-", "#", "#"],["-", "#", "-", "-", "-"],["-", "-", "#", "-", "-"],["-", "#", "#", "-", "-"],["-", "-", "-", "-", "-"] ]Example of the expected output:[ ["1", "1", "2", "#", "#"],["1", "#", "3", "3", "2"],["2", "4", "#", "2", "0"],["1", "#", "#", "2", "0"],["1", "2", "2", "1", "0"] ]Here is a tip. When checking adjacent positions to a specific position in the grid,the following table might assist you in determining adjacent indexes:NW position =current_row - 1current_col - 1N position =current_row - 1current_colNE position =current_row - 1current_col + 1W position =current_rowcurrent_col - 1Current position =current_rowcurrent_colE position…
Implement the function total_price, which takes in a list of prices of individual products and needs to find the total price. Unfortunately, any product that is priced greater than or equal to $20 has a 50 percent tax, so include that in the final price. Try to do this in one line! Cast your final answer to an integer to avoid floating point precision errors. For example, if x contains your final answer, return int(x)! def total_price(prices): Finds the total price of all products in prices including a 50% tax on products with a price greater than or equal to 20. >>> total_price ([5, 20, 30, 71) 87 total_price([8, 4, 3]) >>> total_price ([10, 100, 4]) 164 >>> 15 "*** YOUR CODE HERE ***"
Write a function called has_duplicates that takes a string parameter and returns True if the string has any repeated characters. Otherwise, it should return False. Implement has_duplicates by creating a histogram using the histogram function above. Do not use any of the implementations of has_duplicates that are given in your textbook. Instead, your implementation should use the counts in the histogram to decide if there are any duplicates. Write a loop over the strings in the provided test_dups list. Print each string in the list and whether or not it has any duplicates based on the return value of has_duplicates for that string. For example, the output for "aaa" and "abc" would be the following. aaa has duplicatesabc has no duplicates Print a line like one of the above for each of the strings in test_dups. test_dups = ["zzz","dog","bookkeeper","subdermatoglyphic","subdermatoglyphics"]
In python I have N unique coupons that are included in boxes of the cereal being sold. A consumer wins the contest after collecting N coupons. I seek to simulate the contest with the function couponTrial(N,debug), where ? is the number of coupons and debug is a flag that is set when the function is being debugged. It must include the function and imports the Python random number generator.
The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the Fibonacci() function, which has an index, n, as parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: Fibonacci(7) is 13 Note: Use a for loop and DO NOT use recursion.
2. Write the definition of a bool function named BooleanMode () whose header is bool BooleanMode (bool data[), int n) Given that n represents the size of data, the function returns the truth value that appears the most in data. If there is an equal number of both truth values in data, the function returns the truth value that appeared first. For instance, if data = [true, true,false, false,false, true,falsel, then the function will return false. Impl