Questions tagged [negate]
81 questions
0
votes
2 answers
How to replace values in df that are NOT fulfilling condition
I am trying to clean my data and can't find a way to replace values that are not according to my conditions like in the following example:
df1<- data.frame(
A=c("a","b","c"),
Ch=c("c1","xyz","c2"),
val=paste0("x",1:3), stringsAsFactors =…
antonina
- 99
- 7
0
votes
1 answer
Assembly negation in msp430
I have the following versions of negating some integer value (in R12) in assembly in msp430 :
inv R12
inc R12
this is according to the manual and I think this will work the same?
inv R12
add #1, R12
But will this work and why not? :
sub #1,…
user8756425
- 31
- 5
0
votes
0 answers
Scheme altering tree values
I receive a tree and suppose to output the same tree with the values negated: 1 becomes -1, -2 becomes 2, #t becomes #f and the opposite way.
The tree is flexible - each can have multiple sons, one or none.
I'm not allowed to add user-defined helper…
Adam Morad
- 149
- 1
- 7
0
votes
0 answers
How to use negate function with balanced ternary numbers?
I've been trying to convert balanced ternary numbers through the negate function in python
def convert_to_balanced_ternary(n):
if n == 0:
return '0'
negative = n < 0
bt = ''
while n > 0:
r = n % 3
if r == 0:
bt = '0' + bt
…
Mr Mister
- 1
- 1
0
votes
1 answer
Regex to remove all except XML
I need help with a Regex for notepad++ to match all but XML
The regex I'm using:
(!?\<.*\>) <-- I want the opposite of this (in first three lines)
The example code:
[20173003] This text is what I want to delete…
ScaZ
- 39
- 6
0
votes
1 answer
bitwise negate and bitwise XOR 1 not equivalent?
My discrete math tells me that negate every bit of a binary number is equivalent to XOR it with 1. That is:
~1010 === 0101
1010 XOR 111 = 0101
But this doesn't hold in javascript:
~123 === -124
123 ^ 1 === 122
Why?
Boyang
- 2,322
- 5
- 22
- 47
0
votes
2 answers
Automating process to multiply values in tab delimited file by -1 to negate them
I've been manually processing a large amount of files in Excel. I've done some searching but haven't found a definitive best practice as to how I can achieve this process in an automated fashion.
My manual process is as follows:
I have a .tab…
UnladenSwallow
- 23
- 3
0
votes
4 answers
Is there a difference between -x vs x * -1.0f?
In java, is there a difference between negating a variable vs multiplying a variable by a float minus one, if the variable is also a float?
Marek Krzeminski
- 904
- 11
- 27
0
votes
2 answers
Turn on leftmost bit of a Short
Original question changed.
I want to bitwise turn off the left most bit of a Short value (&H8000) and leave the other bits as they are.
Dim x = BitConverter.GetBytes(Short.MaxValue Or &H8000)
Dim z = BitConverter.ToInt16(x, 0)
Isn't there any…
Shimmy Weitzhandler
- 92,920
- 119
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- 596
0
votes
2 answers
Python text search library
I am looking for a library that would let me do something like the following:
matches(
user_input="hello world how are you what are you doing",
keywords='+world -tigers "how are" -"bye bye"'
)
Basically I want it to match strings based on…
ipartola
- 1,502
- 3
- 13
- 25
0
votes
1 answer
Regex and jquery validate. Negate expression
I'm working on a addition method for the jquery validate plugin which must detect if 3 or more consecutive identical characters are entered, and prompt a message.
To do so I need to negate a regex expression. This is my…
Adorablepolak
- 137
- 3
- 15
0
votes
1 answer
In Ruby, how to implement "20 - point" and "point - 20" using coerce()?
In Ruby, the operation of
point - 20 # treating it as point - (20,20)
20 - point # treating it as (20,20) - point
are to be implemented.
But the following code:
class Point
attr_accessor :x, :y
def initialize(x,y)
@x, @y = x, y
…
nonopolarity
- 130,775
- 117
- 415
- 675
0
votes
2 answers
Negating Regular Expression for Price
I have a regular expression for matching price where decimals are optional like so,
/[0-9]+(\.[0-9]{1,2})?/
Now what I would like to do is get the inverse of the expression, but having trouble doing so. I came up with something simple…
LJS
- 33
- 4
0
votes
3 answers
Negate regular expression in Perl
I am splitting a text file into blocks in order to extract those blocks which do not contain a certain line by using a regular expression.
The text file looks like this:
[Term]
id: id1
name: name1
xref: type1:aab
xref: type2:cdc
[Term] …
atreju
- 787
- 4
- 13
- 29
0
votes
5 answers
How to negate regex validation string?
I want to replace all the string except the @[anyword]
I have string like this:
yng nnti dkasih tau :)"@mazayalinda: Yg klo ada cenel busana muslim aku mau ikutan dong "@noviwahyu10: Model ! Pasti gk blh klo k
and the @mazayalinda and @noviwahyu10…
nencor
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