matlab常用函数（Matlab common functions）.docVIP

matlab常用函数（Matlab common functions） Y =-0.0045 In this case, sin is a sine function, exp is exponential function, these are common mathematical functions to MATLAB. The following table is used for the MATLAB basic mathematical functions and trigonometric functions: Small order: basic mathematical functions commonly used in MATLAB ABS (x): the absolute value of the scalar or vector length Angle (z): Z (Phase angle phase). Sqrt (x): open square Real (z): real Z Imag (z): the imaginary part of the complex Z Conj (z): complex conjugate complex Z Round (x): four to five homes to the nearest integer Fix (x): both positive and negative, rounding down to the nearest integer Floor (x): the floor function, that is to the nearest integer decimal rounding Ceil (x): the ceiling function, which is added to the nearest integer decimal Rat (x): X is expressed as a fraction of the real Rats (x): the real x expansion for a number of scores Sign (x) (Signum function): symbol function. When x0, sign (x) =-1; When x=0, sign (x) =0; When x0, sign (x) =1. Finishing: MATLAB small common trigonometric function Sin (x): sine function Cos (x): cosine function Tan (x): tangent function Asin (x): inverse sine function ACOS (x): inverse cosine function Atan (x): arctangent function Atan2 (x, y): the four quadrant arctangent function Sinh (x): beyond the sine function Cosh (x): beyond the cosine function Tanh (x): beyond the tangent function Asinh (x): beyond the sine function Acosh (x): beyond the cosine function Atanh (x): beyond the anti tangent function Variables can also be used to store vector or matrix, and carry out various operations, as the following example of the column vector (Row vector) operation: X = [1 35 2]; Y = 2*x+1 Y = 37115 Tips: variable naming rules The first 1. letters must be English letters between 2. letters can not stay in the 3. spaces can have up to 19 letters, MATLAB will ignore the extra letters We can change, add or delete vector elements: Y (3) = 2% to change t