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logspace

Generate logarithmically spaced vector

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Syntax

y = logspace(a,b)
y = logspace(a,b,n)
y = logspace(a,pi)
y = logspace(a,pi,n)

Description

example

y = logspace(a,b)generates a row vectoryof 50 logarithmically spaced points between decades10^aand10^b. Thelogspace函数用于创建频率尤其有用cy vectors. The function is the logarithmic equivalent oflinspaceand the ‘:’ operator.

example

y = logspace(a,b,n)generatesnpoints between decades10^aand10^b.

y = logspace(a,pi)generates 50 points between10^aandpi, which is useful in digital signal processing for creating logarithmically spaced frequencies in the interval[10^a,pi].

y = logspace(a,pi,n)generatesnpoints between10^aandpi.

Examples

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Open Live Script

创建一个向量50对数间隔点s in the interval[10^1,10^5].

y = logspace(1,5);
Open Live Script

Create a vector of 7 logarithmically spaced points in the interval[10^1,10^5].

y1 = logspace(1,5,7)
y1 =1×7105× 0.0001 0.0005 0.0022 0.0100 0.0464 0.2154 1.0000
Open Live Script

Create a vector of complex numbers with 8 logarithmically spaced points between10^(1+2i)and10^(5+5i).

y = logspace(1+2i,5+5i,8)
y =1×8 complex104× -0.0001 - 0.0010i 0.0029 - 0.0024i 0.0133 + 0.0040i 0.0147 + 0.0497i -0.1242 + 0.1479i -0.7150 - 0.0822i -1.2137 - 2.3924i 4.9458 - 8.6913i

Input Arguments

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First bound, specified as a numeric scalar. Theaargument defines a bound of the interval over whichlogspacegenerates points.acan be real or complex, and the other bound,b, can be either larger or smaller thana. Ifbis smaller thana, then the vector contains descending values.

Data Types:single|double
Complex Number Support:Yes

Second bound, specified as a numeric scalar. Thebargument defines a bound of the interval over whichlogspacegenerates points.bcan be real or complex, andbcan be either larger or smaller than the other bound,a. Ifbis smaller thana, then the vector contains descending values.

Data Types:single|double
Complex Number Support:Yes

Number of points, specified as a real numeric scalar.

  • Ifnis1,logspacereturns10^b.

  • Ifnis zero or negative,logspacereturns an empty row vector.

  • Ifnis not an integer,logspaceroundsndown and returnsfloor(n)points.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced before R2006a

See Also

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