EAS 509 Home Page:

http://web.ics.purdue.edu/~braile/eas509/eas509home.htm

Prof. Lawrence W. Braile

Department of Earth and Atmospheric Sciences

Purdue University

West Lafayette, IN 47907-1397

braile@purdue.edu

Last updated: November 15, 2003

Matlab Codes (click on any of the following files to download; save in your Matlab work folder; see EAS 509 notes for additional information, program listings and examples):

Least squares files:

linfit.m – least squares straight line calculation using Cramer’s rule

PlotResidualsVSOrder.m

RegressionErrorsinY.m

TestPlotyy.m

PolynomialCalc.m

PolynomialFitLS.m

Spectral analysis, Fourier analysis, filtering files:

ConvolutionTool.m – Demo of convolution (will run on Matlab Student Edition and

Student Version)

TransformTool.m – Demo of Fourier transform/spectral analysis (will run on Matlab

Student Edition and Student Version)

FilterTool.m – Demo of filtering using butterworth filter (requires Matlab Signal

Processing Toolbox in Full version or Student Version; see Matlab codes butter

and filtfilt)

signal.m  needed by ConvolutionTool, TransformTool and FilterTool

ricker.m  needed by ConvolutionTool, TransformTool and FilterTool

PltWilberZSpectrum.m

Calculate an plot spectrum of seismogram

NNAz1.txt – Seismogram data needed for PltWilber codes

PltWilberZonlyLow.m

PltWilberZonlyHigh.m

Two-Dimensional data processing and display:

Compare2DInterpolation.m

CompareShadingMethods.m

DisplayColormap.m

ExampleSurfandContour.m

GridandPlotIllinoisMagneticsData.m

InterpolationSinc.m

RandGridDataIllinoisMagnetics.m

SeamntPlt.m

trendfilt.m

VisualizingSinc.m

extendZ.m

 One-Dimensional Interpolation:

humps.m

interptest1.m

interptest2.m

msspline1.m

msspline.m

lagran1.m

lagran.m

pccp1.m

pccp.m

linear.m

lsqint1.m

lsqint.m

EAS 509 Data Source Links:

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