Multiplying each sublist by a constant

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I want to multiply each sublist in list l2 with a constant number i.e 13*1,11*1,9*1 and 7*2,5*2,3*2 and 1*3 and the final result would be 13,11,9 and 14,10,6 and 3.

Using enumerate


print([[j*i for j in v] for i, v in enumerate(l2, 1)])


[[13, 11, 9], [14, 10, 6], [3]]

Python, Given a list of lists, the task is to multiply each element in a sublist by its index and return a summed list. Given below are a few methods to solve the problem. Set up a column of numbers you want to multiply, and then put the constant in another cell. 2. In a new cell, type "=" and click the first cell you want to multiply. 3. Type the name of the cell

You can leverage enumerate here:

l2 = [[13,11,9],[7,5,3],[1]]

l3 = [[x * (idx + 1) for x in sublist] for idx, sublist in enumerate(l2)]

This yields

[[13, 11, 9], [14, 10, 6], [3]]

Python, Sometimes, when we are fed with the list of list, we need to multiply each of its a loop to get all the elements and it's nested components and multiply accordingly. Sublist Maximum in custom sliced List � Python - Constant Multiplication over� To multiply a constant to each and every element of an array, use multiplication arithmetic operator *. To multiplication operator, pass array and constant as operands as shown below. b = a * c. where a is input array and c is a constant. b is the resultant array. Example. In the following python example, we will multiply a constant 3 to an array a.

Try this:


counter = 1
for i in range(len(l2)):
    for j in range(len(l2[i])):
        l2[i][j] *= counter        
    counter += 1


I have a list with lists. How do I multiply a number x with the last , Print the parent list and verify each last element of each sub-list is now x times larger than their original values, with n. Continue Reading. Multiply each equation by a constant that would help to eliminate the y terms. 2x-5y=-21 3x-3y=-18 - 12296200

Is it always the first sublist is 1, the 2nd is two, etc?

for i in range(0, len(l2)):
    i += 1
    print(f'{l2[i-1]} times {i}')
    print(list(map(lambda x: x*i, l2[i-1])))

Multiplying two dimensional data by a constant, You can change 2 in 2 y to whatever constant you want. E.g. Suppose you want to multiply the first dimension by 3 and the second by 2 , you simply write: is faster, by about factor 3) (and it doesn't make sense to compare to all the others ,� 1. Enter the certain number in a blank cell (for example, you need to multiply or divide all values by number 10, then enter number 10 into the blank cell). Copy this cell with pressing the Ctrl + C keys simultaneously. 2. Select the number list you need to batch multiply, then click Home > Paste > Paste Special. See screenshot: 3.

One liner with map and enumerate

[map((idx).__mul__, sublist) for idx,sublist in enumerate(l2,1)] #[[13, 11, 9], [14, 10, 6], [3]]

using numpy.multiply

import numpy as np
[np.multiply(sublist,[idx]).tolist() for idx,sublist in enumerate(l2,1)]

multiply every item in a 2D list by a scalar in python, python multiply all elements in list by constant Given a list of lists l. flat_list = [ item for sublist in l for item in sublist] which means: flat_list = [] for sublist in l: for� I cannot seem to find a way to multiple a column with a constant. For example I have total sales. Now I need to set the target is 15%. The measure would loke like Target Sales = XXX(financials[Sales]) * 15%) + (financial[Sales]) I don't know which function to use in my case. Thank you

How to multiply two lists in Python, Multiplication between two equal length lists multiplies each element from one list by the element at the same index in the other list. For example, multiplying [1,� Select the range that you want to multiply a value, and click Home > Paste > Paste Special. See screenshot below: 3. In the Paste Special dialog box, click All option in the Paste section, and click Multiply option in the Operation section, and click the OK button. See screenshot above: And the selected range will be multiplied by the number 8.7. See screenshot below:

[PDF] Divide-and-conquer algorithms, Thus our method for multiplying n-bit numbers starts by making recursive calls to This merge procedure does a constant amount of work per The three sublists SL,Sv, and SR can be computed from S in linear time; in fact, this compu-. A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

How to multiply positions of a list of lists, Python, Given a list of lists, the task is to multiply each element in a sublist by its You can then convert the iterator to list Multiplying a constant to a NumPy array� PLEASE HELP ME Multiply each equation by a constant that would help to eliminate the y terms. 2 x - 5 y = -21. 3 x - 3 y = -18. What are the resulting equations? A) 6 x - 15 y = -63. -15 x + 15 y = 90.

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  • This is a more general versionof… .. if the list would contain the same number instead of different ones... similarly question is here… and there are about a dozend more on SO already
  • Type Errror:'int' object is not iterable
  • Your error makes no sense. At least not with this code.
  • Yes the first sublist is always 1
  • why not range(1,len(l2)+1) to remove an extra step
  • I thought about that, too. Figured it was about 50/50 on which was better.