# Generate spatial data 1.0

OS : Windows / Linux / Mac OS / BSD / Solaris

Script Licensing : Freeware

Created : Sep 14, 2007

Downloads : 6

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## The script generates spatial data with a ...

The script generates spatial_data with a scale-invariant power spectrum (1/f noise) and a normal error distribution.

The spectral density of the data is proportional to f^beta, where f is the frequency and BETA is the spectral exponent (BETA=0 is white noise, BETA=-2 is brown noise).

To generate Brown noise on a 10x10 grid you type

spatialPattern([10, 10], -2)

which gives a 10x10 matrix containihng the data.

1/f noise is not stationary, and so doesn't have a well defined variance. A variogram of the data show variance linearly increasing with increasing lag.

Time series data can also be generated. For example, a pink noise time series of lenth 1000 is produced by

spatialPattern([1000, 1], -1)

The spectral density of the data is proportional to f^beta, where f is the frequency and BETA is the spectral exponent (BETA=0 is white noise, BETA=-2 is brown noise).

To generate Brown noise on a 10x10 grid you type

spatialPattern([10, 10], -2)

which gives a 10x10 matrix containihng the data.

1/f noise is not stationary, and so doesn't have a well defined variance. A variogram of the data show variance linearly increasing with increasing lag.

Time series data can also be generated. For example, a pink noise time series of lenth 1000 is produced by

spatialPattern([1000, 1], -1)

**• MATLAB Release: R13**

**Demands:****Generate spatial data 1.0 scripting tags:**generate spatial, beta, spatial data, series, variance, brown, generate spatial data, statistics probability, increasing, noise.

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