multiplication Questions
2
Solved
I am trying to write an JS algorithm in which I have two arrays.
The value of the first one will have different numerical values. The second array will be constant, say for example [5, 3, 6, 8].
No...
Jaggy asked 30/6, 2021 at 13:53
3
Solved
I have the following table:
from pyspark.sql import SparkSession, functions as F
spark = SparkSession.builder.getOrCreate()
cols = [ 'a1', 'a2']
data = [([2, 3], [4, 5]),
([1, 3], [2, 4])]
df =...
Caudex asked 28/6, 2021 at 14:29
2
Does anyone have (or can easily write) an optimal inline assembly function for the ARM Cortex M0+ processor in Thumb mode to multiply two 32-bit numbers and return a 64-bit number?
As the M0+ does...
Sera asked 25/4, 2014 at 3:25
12
Solved
I hear this statement quite often, that multiplication on modern hardware is so optimized that it actually is at the same speed as addition. Is that true?
I never can get any authoritative confirm...
Ushas asked 17/2, 2014 at 2:23
4
Solved
I have written programs in C++, Python and Java for matrix multiplication and tested their speed for multiplying two 2000 x 2000 matrices (see post). The standard ikj-implentation - which is in - t...
Neighboring asked 15/7, 2012 at 21:25
3
Solved
Is it possible to multiply two ndarray A, and B and add the result to C, without creating a large intermediate array for A times B?
Numpy has the out keyword parameter for the case of C = A times ...
Subterranean asked 19/7, 2017 at 20:19
7
Solved
Consider the following as a reference implementation:
/* calculates (a * b) / c */
uint32_t muldiv(uint32_t a, uint32_t b, uint32_t c)
{
uint64_t x = a;
x = x * b;
x = x / c;
return x;
}
I a...
Deviled asked 10/11, 2010 at 12:0
15
Solved
I want to perform an element wise multiplication, to multiply two lists together by value in Python, like we can do it in Matlab.
This is how I would do it in Matlab.
a = [1,2,3,4]
b = [2,3...
Exhilarant asked 22/4, 2012 at 19:45
2
I am trying to execute simple multiplication in Assembly. However, I do not see the registers change when the MUL function is called.
mov bx, 5
mov cx, 10
mul cx
Rebeccarebecka asked 30/11, 2016 at 16:12
1
Solved
I am trying to multiply an array typed column by a scalar. This scalar is also a value from the same PySpark dataframe.
For example, I have this dataframe:
df = sc.parallelize([([1, 2],3)]).toDF([&...
Figwort asked 19/6, 2020 at 20:27
6
Solved
how do I multiply lists together in python using a function? This is what I have:
list = [1, 2, 3, 4]
def list_multiplication(list, value):
mylist = []
for item in list:
for place in value:
...
Humor asked 26/9, 2013 at 0:21
3
Solved
I have an assignment where I need to find the product of all of the numbers in an array, I'm not sure how to do this.
int[] numbers = new int[SIZE];
Console.WriteLine("Type in 10 numbers");
C...
Hainaut asked 21/11, 2013 at 22:2
9
Solved
In the software I'm writing, I'm doing millions of multiplication or division by 2 (or powers of 2) of my values. I would really like these values to be int so that I could access the bitshift oper...
Celery asked 11/10, 2011 at 2:2
2
I'm using Django 2.0 and Python 3.7. I've read I can do multiplication in templates by using widthratio -- multiplication in django template without using manually created template tag . However, i...
Episodic asked 24/2, 2020 at 18:31
14
i've the following code in Javascript:
var m1 = 2232.00;
var percent = (10/100);
var total = percent*m1;
alert(total);
The problem is that the variable "total" gives me "223.20000000000002" and ...
Dyeline asked 23/1, 2013 at 22:22
2
Consider that you want to calculate the low 128-bits of the result of multiplying a 64-bit and 128-bit unsigned number, and that the largest multiplication you have available is the C-like 64-bit m...
Kandykane asked 17/8, 2018 at 19:27
3
I have found out that both mul and imul can be used to multiply a signed number to an unsigned number.
For example:
global _start
section .data
byteVariable DB -5
section .text
_start:
mov al...
Everard asked 3/8, 2017 at 22:46
19
Solved
Multiplication and division can be achieved using bit operators, for example
i*2 = i<<1
i*3 = (i<<1) + i;
i*10 = (i<<3) + (i<<1)
and so on.
Is it actually faster to use ...
Posology asked 15/6, 2011 at 11:31
1
Solved
Recently, I've tried creating a for loop that multiplies each integer in the list and returns each sequential product until the overall product of all integers is given.
import operator
from oper...
Enroll asked 30/11, 2019 at 2:34
1
I am currenty converting the nacl library to risc-v. I already have poly1305 working. I am trying to do this using the risc-v core instruction set, so I don't have a multiplier. The algorithm for P...
Emmer asked 1/11, 2019 at 14:4
3
Solved
I know how to design a 4x4 array multiplier , but if I follow the same logic , the coding becomes tedious.
4 x 4 - 16 partial products
64 x 64 - 4096 partial products.
Along with 8 full adders ...
Paganini asked 23/5, 2013 at 7:45
5
Solved
Assume I have matrices P with the size [4, 4] which partitioned (block) into 4 smaller matrices [2,2]. How can I efficiently multiply this block-matrix into another matrix (not partitioned matrix b...
Zygodactyl asked 14/6, 2019 at 15:21
1
Solved
I am trying to get some trade information from an exchange websocket.
Both values .p and .q are enclosed between double quotes in the JSON I get from the socket.
When I try to multiply two values,...
Telles asked 2/7, 2019 at 23:49
8
Solved
Is booth algorithm for multiplication only for multiplying 2 negative numbers (-3 * -4) or one positive and one negative number (-3 * 4) ? Whenever i multiply 2 positive numbers using booth algorit...
Wrench asked 19/11, 2011 at 4:8
2
Solved
In fixed point math I use a lot of 16bit signals and perform multiplication with 32bit intermediate results. For example:
int16_t a = 16384; //-1.0q14 or 1.0*2^14
int16_t b = -24576; // -1.4q14 or...
Eductive asked 6/6, 2013 at 15:51
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