Example of Fig 4.12

Spectrum of EOF

function [lam1, lam2]=example12
%
%  Spectrum for geopotential
%

flat = [-90 90];
flon = [0 360];
clf;

[zt,ind,fcos]=readz500(flat,flon,'season','jfm','scaling','yes');

[z,sdz]=anomaly(zt,'anom');

[eof1,lam1,v,proj]=eoffast(z,ind,15,1);

subplot(211)
plot(lam1,'k*','markersize',5);
axis([ 0 35 0 0.5]);
title(' Spectrum of EOF -- Mean Subtracted','fontname','times')

[z,sdz]=anomaly(zt,'none');

[eof1,lam2,v,proj]=eoffast(z,ind,15,1);

subplot(212)
plot(lam2,'k*','markersize',5)
axis([ 0 35 0 1.2]);
title(' Spectrum of EOF ','fontname','times')
orient tall;
print('-dpdf','-painters','-adobecset',['example12.pdf']);
Normalization anom
Expanded Field
 No Normalization none
Expanded Field

ans =

    0.2598
    0.1703
    0.1054
    0.0657
    0.0482
    0.0427
    0.0382
    0.0334
    0.0288
    0.0251
    0.0218
    0.0193
    0.0169
    0.0156
    0.0137
    0.0122
    0.0111
    0.0092
    0.0086
    0.0069
    0.0065
    0.0063
    0.0054
    0.0049
    0.0042
    0.0036
    0.0033
    0.0030
    0.0024
    0.0022
    0.0021
    0.0019
    0.0013
    0.0000