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Tilde operator is used to define the relationship between dependent variable and independent variables in a statistical model formula. The variable on the left-hand side of tilde operator is the dependent variable and the variable(s) on the right-hand side of tilde operator is/are called the independent variable(s). So, tilde operator helps to define that dependent variable depends on the independent variable(s) that are on the right-hand side of tilde operator.
Example
> Regression_Model <- lm(y~ x1 + x2 + x3)
Here, the object Regression_Model stores the formula for linear regression model created by using function lm and y is the dependent variable and x1, x2, and x3 are independent variables.
This model can be created by using a dot (.) if we want to include all the independent variables but for this purpose, we should have all the variables stored in a data frame.
Example
> Regression_Data <- data.frame(x1, x2, x3, y)> Regression_Model_New < - lm(y~ . , data = Regression_Data)
This will have the same output as the previous model, but we cannot use tilde with dot if we want to create a model with few variables.
Suppose you want to create a new model with x1 and x3 only then it can be done as follows −
> Regression_Model_New1 <- lm(y~ x1 + x3, data = Regression_Data)
But we cannot do it using dot with tilde as −
> Regression_Model_New2_Incorrect <- lm(y~ . + x3, data = Regression_Data)
https://www.tutorialspoint.com/how-to-write-text-and-output-it-as-a-text-file-using-r
FAQs
How to Use the Tilde Operator (~) in R. You can use the tilde operator (~) in R to separate the left hand side of an equation from the right hand side. This operator is most commonly used with the lm() function in R, which is used to fit linear regression models.
How does tilde operator work? ›
In mathematics, the tilde operator (Unicode U+223C), sometimes called "twiddle", is often used to denote an equivalence relation between two objects. Thus "x ~ y" means "x is equivalent to y". It is a weaker statement than stating that x equals y.
What is the use of tilde in coding? ›
For electronic text interchange, the tilde is the most prevalent standard. It's a bitwise operator in C programming that represents a unary negation, and it's also an operator in regular expression pattern matching. The tilde character is sometimes used in operating systems to abbreviate large file names.
What is the tilde in statistics? ›
Tilde ∼ means "is sampled from this distribution"
What is the tilde symbol? ›
iOS and Android Mobile Devices
Press and hold the A, N, or O key on the virtual keyboard to open a window with various accented options. Slide your finger to the character with a tilde and lift your finger to select it. How do you pronounce "tilde?" The English pronunciation for "tilde" is "til-duh."
What does the '~' mean in programming? ›
In mathematics, the tilde often represents approximation, especially when used in duplicate, and is sometimes called the "equivalency sign." In regular expressions, the tilde is used as an operator in pattern matching, and in C programming, it is used as a bitwise operator representing a unary negation (i.e., "bitwise ...
How do you use ∼? ›
In a word, The tilde (~) separates the left side of a formula with the right side of the formula.
What does ∼ mean? ›
"∼" is one of many symbols, listed in the Wikipedia article on approximation, used to indicate that one number is approximately equal to another. Note that "approximately equal" is reflexive and symmetric but not transitive. "∼" is one of many symbols used in logic to indicate negation.
What does tilde mean in regular expression? ›
Tilde (~) operator helps the regular expression to be matched in any part of the string easily. Following are the operators that can be used in this category: (~) It matches the regular expression with a case sensitive approach. (~*) It also matches the regular expression but with a case insensitive approach.
What is tilde in regular expression? ›
The tilde operator returns true or false depending on whether or not a regular expression can match a string or a part thereof. ~ (Matches regular expression, case sensitive) ~* (Matches regular expression, case insensitive) !~ (Does not match regular expression, case sensitive)
The symbols are used frequently in high-energy physics by theorists and phenomenologists. In that context, they mean less than about or greater than about, i.e., x≲10 means that x is less than about 10, so as @DavidK suggests, either x<10 or x≈10.
What does ~~ do in Javascript? ›
The “double tilde” (~~) operator is a double NOT Bitwise operator. Use it as a substitute for Math.
What is this '~' character? ›
Updated: 05/01/2023 by Computer Hope. Alternatively known as the squiggly or twiddle, the tilde is a character ( ~ ) on keyboards below the Esc (escape key). It is on the same key as the back quote and resembles a squiggly line.
How do you type ∼? ›
2 Answers. On the US International PC layout, you press shift on the key next to the Z and then space. Or Option/alt n and then space.
What does '~' means in Python? ›
The bitwise operator ~ (pronounced as tilde) is a complement operator. It takes one bit operand and returns its complement. If the operand is 1, it returns 0, and if it is 0, it returns 1.
How to do the squiggly line above the n? ›
Enable the numeric keypad by turning on the Num lock key. Hold the Alt key then type 164 on the numeric keypad to create a lowercase ñ. For the uppercase Ñ, hold the Alt key then type 165.
What is the shift of tilde? ›
A shift trade, also known as a shift swap, occurs when a team member requests one or more of your business's employees to trade one of their scheduled shifts for a shift that the team member who submitted the shift trade request cannot work for whatever reason.
