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Questions tagged [complement]

This tag is deprecated! Use more specific tags instead: For the binary representations of negative values in computer science, use tags [ones-complement] and [twos-complement]; For the bitwise complement operation, use [bitwise], or [regex-negation] for the use of complement patterns in regular expressions, or [bit-manipulation] for complementing said data.

This tag is deprecated! Please consider use of the following tags instead:

112 questions
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Given a gray value, what color provides highest visual contrast?

Assume that I've a gray image, and I want to draw e.g. text on it. Now the image has some dark and some bright regions. So if I choose for every character a separate color, in what way do I compute such a color to gain highest contrast of the…
math
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python3: How to get logical complement (negation) of a binary number, eg. '010' => '101'?

Maybe I'm missing something but I can't find a straightforward way to accomplish this simple task. When I go to negate a binary number through the "~" operator it returns a negative number due to the two's complement: >>> bin(~0b100010) # this won't…
etuardu
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Algorithm of a complement graph using adjacency matrix

How to implement a complement graph which is given with adjacency matrix (literally any graph)? I am wondering how to make a code of that graph, but I am not sure how to complete it. I usually use pseudocode for these "early" implementations. This…
Jack Jones
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Python - finding complement of 2 lists

I'm looking for a method that would allow me to check what elements are missing when comparing 2 lists. A lot like in this thread but I want to write this in NumPy Python. Complement of Two Lists? import numpy as np numbers =…
michal-ko
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Coq proof that complement is involutive

How can I prove that the complement of a set is involutive? Require Import Ensembles. Arguments In {_}. Arguments Complement {_}. Variables (T:Type) (A:Ensemble T). Axiom set_eq: forall (E1 E2:Ensemble T), (forall x, E1 x <-> E2 x) -> E1 =…
larsr
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Unsigned char 1's complement in C

Suppose I have the following code: unsigned char c = 0; printf("%u\n", ~c); GCC prints the value 4294967295, means it prints the value of ULONG_MAX. C11 6.3.1.3 Signed and unsigned integers: When a value with integer type is converted to…
Jayesh
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What is long version of a Common Bitwise Operation?

BitField1 = 00100110 BitField2 = 00110011 ((BitField1 & ~BitField2) | (BitField2 & ~BitField1)); = 00010101 So this is the long version of a common bitwise operation, what is it? Want to understand if above bit operation is some known operation…
sasha
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Binary Arithmetic using sign magnitude and two's complement

I am revising for an exam i have in a weeks time. I have an example question which i have answered but i am unsure if it is correct. Could someone please verify my answer for me and explain where iv gone wrong if it was incorrect. Here is the…
Volken
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Algorithm for 2's complement division

Came across two division algorithms (restoring and non-restoring) applicable to signed magnitude numbers. But couldn't apply it for numbers in 2's complement format. Are there any algorithms for 2's complement division?
user567879
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Do we ignore overflow in Two's Complement

I'm trying to wrap my head around overflow within twos complement for example say I'm trying to take away these two binary numbers: 1111 1000 0100 - 010 111 001 000 I convert the 2nd binary number to it's two complement equivalent and then simply…
Wolf
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NetLogo, Questions about Negation (absolute Complement) and HubNet and hubnet-send-override

I'm writing a Hubnet-application and I want the view of each client to depend on the turtles in that client's variable turtles I can see. In particular I want to hide all turtles not in a clients turtlesIcansee from her. I've managed to get this to…
ProfessorHelloKittyNr1
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How to draw complement of a network graph?

Any function in that Graphviz which can do that? If not, any other free software that can do that?
yeeen
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Better algorithm for complementing integer value excluding the leading zero binary bits

I will explain first what I mean by "complementing integer value excluding the leading zero binary bits" (from now on, I will call it Non Leading Zero Bits complement or NLZ-Complement for brevity). For example, there is integer number 92. the…
null
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Matching parts of lines in a file (python)

I currently have a list of genes in a file. Each line has a chromosome with it's information. Such an entry appears as: NM_198212 chr7 + 115926679 115935830 115927071 11593344 2 115926679,'115933260', 115927221,'115935830', The sequence for…
Peter Hanson
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Find the (deep) complement of two hashes

The complement is the mathematical term for what I'm looking for, but for context and possibly more targeted solution: I have hash A, which can have nested hashes (i.e. they're N-dimensional), and I apply to it a process (over which I have no…
Félix Saparelli
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