1. ABS (X)
Returns the absolute value of X.
SQL> select abs (-1) A, ABS (1) B, ABS (0) C FROM DUAL;
A B C
------------------------------
1 1 02. ACOS (X)
Returns the arc cosine of X.
SQL> select acos (0) A, ACOS (0.5) B, ACOS (1) C FROM DUAL;
A B C
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MathObject
Math objects are built-in objects learned in high school mathematics. It knows all the formulas used to solve the most complex mathematical problem. If it is given a number, it can calculate the result.
The math object has several
ABS (x ):Basic syntax and crystal syntax.Parameter: X is the number or currency in which you want to return the absolute value.Return Value: Numeric ValueOperation: ABS (x) returns the absolute value of X.Example:ABS (1, 1.50)1.50 is returned.
ABS (-
Attributes of the Math object
E: Value e, bottom of the natural logarithmLN10: the natural logarithm of 10LN2: natural logarithm of 2LOG2E: Base-2 logarithm of ELOG10E: Base-10 logarithm of EPI: Value DeliverySQRT1_2: the square root of 1/2SQRT2:
Brief introductionThe Java.lang.Math class contains methods for basic numeric manipulation, such as basic exponents, logarithms, square roots, and trigonometric functions.class declarationThe following is a declaration of the Java.lang.Math
Attributes of the math object
E: Value E, bottom of the natural logarithm
Ln10: the natural logarithm of 10
Ln2: natural logarithm of 2
Log2e: Base-2 logarithm of E
Log10e: Base-10 logarithm of E
Pi: Value Delivery
Sqrt1_2: the square
Intrinsic Functions (DirectX HLSL)The following table lists the intrinsic functions available in HLSL. Each function had a brief description, and a link to a reference page that had more detail about the input argument and re Turn type.
inherited1, the purpose of inheritance is to extend the function of the class
2, a subclass of Java can only inherit a parent class
3, Java does not allow multiple inheritance, allowing multiple layers of inheritance
4. The private method in the
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Author Experience: July 17 just graduated child ~~16 internship at the end of the year to do DBA, Midway has changed, want to data mining as their long-term career,
This procedure by foreign vulture eldest brother to write, and published the source code, this is his 95 years of a work, can say was very successful at that time!
This program is clever use of the constant changes in the coordinates, so as to
2.1 What is an objectAll JavaScript data can be treated as objects, and each object has its attributes (properties) and methods (methods).An object's properties reflect certain properties of the object, such as the length of the string, the width of
Sin (x): Finding the sine of Xcos (x): Finding the cosine of XASIN (x): Finding the inverse of XACOs (x): Finding the inverse cosine of xTan (x): Find the tangent of XAtan (x): To find the inverse tangent of XHypot (x, y): To find the hypotenuse
The mathematical constants provided by the Python standard library Mathmath
Pi
Mathematical constant Pi, the variable space belongs to the standard library math
E
The mathematical constant e,e is the
In the process of programming, we often perform mathematical operations on some numbers, such as what we want to ask for absolute or cosine. Do these methods need to be implemented by ourselves? In fact, the math class math class in Java.lang
To sort out the recent Pearson similarity calculation in the collaborative filtering recommendation algorithm, incidentally learning the simple use of the next R language, and reviewing the knowledge of probability statistics.I. Theory of
7. Angle cosine (cosine)It can also be called cosine similarity. The angle cosine of the geometry can be used to measure the difference in the direction of two vectors, which is borrowed from the machine learning to measure the difference between
JS has a built-in object--math object, in some cases very useful, let us analyze:
Math Common Properties (note to capitalize):
e returns the arithmetic constant E, that is, the base of the natural logarithm (approximately equal to 2.718)LN2
This paper summarizes and analyzes the PHP mathematical operation function. Share to everyone for your reference, specific as follows:
First, the commonly used function description:
Abs: Get absolute value.
Acos: Gets the inverse cosine value.
JavaScript functions can be divided into five categories altogether:• General functions• Array functions• Date function• Mathematical Functions• String Functions1. General functionsThe JavaScript general functions include the following 9 functions:(1
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