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Questions tagged [clamp]

Constrains a value between a lower and upper bound. Use this tag when working with a clamp() function in the languages that support it. Not to be confused with CLAMP Toolkit (Clinical Language Annotation, Modeling, and Processing).

In computer terms, to clamp a value is to make sure that it lies between some maximum and minimum values. If it’s greater than the max value, then it is replaced by the max, etc.

Clamp documentation links based on native language support:

.NET -> https://learn.microsoft.com/en-us/dotnet/api/system.math.clamp?view=netcore-3.1

C++ -> https://en.cppreference.com/w/cpp/algorithm/clamp

CSS -> MDN ; CSS Values

R -> (raster package) https://www.rdocumentation.org/packages/raster/versions/3.3-13/topics/clamp

Ruby -> (Comparable package) https://ruby-doc.org/core-2.7.0/Comparable.html#method-i-clamp

Rust -> https://docs.rs/num/0.2.1/num/fn.clamp.html

Many languages, such as C, Haskell, Java, JavaScript, PHP, Python, and Raku (Perl 6) do not have a native clamp implementation. Workarounds, custom implementations, or native feature extensions for a given language can typically be found by searching for "clamp in " here on Stack Overflow.

Not to be confused with the CLAMP Toolkit (Clinical Language Annotation, Modeling, and Processing).

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What's the most elegant way to cap a number to a segment?

Let's say x, a and b are numbers. I need to limit x to the bounds of the segment [a, b]. In other words, I need a clamp function: clamp(x) = max( a, min(x, b) ) Can anybody come up with a more readable version of this?
Samuel Rossille
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How can I clamp (clip, restrict) a number to some range?

I have the following code: new_index = index + offset if new_index < 0: new_index = 0 if new_index >= len(mylist): new_index = len(mylist) - 1 return mylist[new_index] Basically, I calculate a new index and use that to find some element…
Denilson Sá Maia
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Where can I find the "clamp" function in .NET?

I would like to clamp a value x to a range [a, b]: x = (x < a) ? a : ((x > b) ? b : x); This is quite basic. But I do not see a function "clamp" in the class library - at least not in System.Math. (For the unaware to "clamp" a value is to make sure…
Danvil
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Standard way to "clamp" a number between two values in Swift

Given: let a = 4.2 let b = -1.3 let c = 6.4 I want to know the simplest, Swiftiest way to clamp these values to a given range, say 0...5, such that: a -> 4.2 b -> 0 c -> 5 I know I can do the following: let clamped = min(max(a, 0), 5) Or…
George WS
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Difference between Uint8Array and Uint8ClampedArray

What is the difference between Uint8Array and Uint8ClampedArray in JavaScript? I understand that Uint8ClampedArray is used with canvas for pixel manipulations. Why is that and what is the benefit?
Luka
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Does java have a clamp function?

Suppose I have a value, I usually do this to "clamp" it to a range, here the range [0..1]. That is if it is below the range start, increase it to the range start, it above the range end, reduce it to the range end. clampedValue = Math.max(0,…
weston
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Java - limit number between min and max

I want to return the number as long as it falls within a limit, else return the maximum or minimum value of the limit. I can do this with a combination of Math.min and Math.max. public int limit(int value) { return Math.max(0, Math.min(value,…
Sean Connolly
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Fastest way to clamp a real (fixed/floating point) value?

Is there a more efficient way to clamp real numbers than using if statements or ternary operators? I want to do this both for doubles and for a 32-bit fixpoint implementation (16.16). I'm not asking for code that can handle both cases; they will be…
Niklas
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Clamping floating numbers in Python?

Is there a built-in function for this in Python 2.6? Something like: clamp(myValue, min, max)
Joan Venge
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Is there a method to limit/clamp a number?

I wrote the following code, which keeps x within the range (a..b). In pseudo code: (if x < a, x = a; if x > b, x = b) In Ruby it would be something like: x = [a, [x, b].min].max As it is quite basic and useful function, I was wondering if there…
mb14
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Pythonic way to replace list values with upper and lower bound (clamping, clipping, thresholding)?

I want to replace outliners from a list. Therefore I define a upper and lower bound. Now every value above upper_bound and under lower_bound is replaced with the bound value. My approach was to do this in two steps using a numpy array. Now I wonder…
ppasler
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Clip values between a minimum and maximum allowed value in R

In Mathematica there is the command Clip[x, {min, max}] which gives x for min<=x<=max, min for xmax, see http://reference.wolfram.com/mathematica/ref/Clip.html (mirror) What would be the fastest way to achieve this in R?…
Tom Wenseleers
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Does a "clamp" number function exist in PHP?

I wrote a function to "clamp" numbers in PHP, but I wonder if this function exists natively in the language. I read PHP.net documentation in the math section, but I couldn't find it. Basically what my function does is that it accepts a variable, an…
ILikeTacos
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How to implement a smooth clamp function in python?

The clamp function is clamp(x, min, max) = min if x < min, max if x > max, else x I need a function that behaves like the clamp function, but is smooth (i.e. has a continuous derivative).
Roko Mijic
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Most efficient way to clamp values in an OpenCv Mat

I have an OpenCv Mat that I'm going to use for per-pixel remapping, called remap, that has CV_32FC2 elements. Some of these elements might be outside of the allowed range for the remap. So I need to clamp them between Point2f(0, 0) and Point2f(w,…
Kyle McDonald
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