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Last change
on this file since 52 was
20,
checked in by bduin, 13 years ago
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updates for handling soft labels
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File size:
1.0 KB
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| Rev | Line | |
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| [10] | 1 | %PLOTSPECTRUM
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| 2 | %
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| 3 | % h = PLOTSPECTRUM(L)
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| 4 | % h = PLOTSPECTRUM(W)
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| 5 | %
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| 6 | % Plot spectrum as stored in vector L or in mapping W.
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| 7 |
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| 8 | function [h1,h2] = plotspectrum(L)
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| 9 |
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| 10 | if ismapping(L)
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| 11 | if strcmp(getmapping_file(L),'psem')
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| 12 | L = getdata(L,4);
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| 13 | tit = 'Embedding Spectrum';
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| [20] | 14 | elseif strcmp(getmapping_file(L),'affine') | strcmp(getmapping_file(L),'pe_em')
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| [10] | 15 | try
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| [20] | 16 | L = getdata(L,'eval');
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| [10] | 17 | tit = 'Eigenvalues';
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| 18 | catch
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| 19 | error('No spectrum found');
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| 20 | end
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| 21 | else
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| 22 | error('No spectrum found')
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| 23 | end
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| 24 | else
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| 25 | tit = 'Eigenspectrum';
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| 26 | end
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| 27 |
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| 28 | L = flipud(sort(L(:)));
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| 29 | sig1 = max(find(L>=0));
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| 30 | sig2 = length(L) - sig1;
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| 31 |
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| 32 | if sig2 == 0
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| 33 | hh1 = plot([1:sig1],[L(1:sig1)]);
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| 34 | else
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| 35 | hh1 = plot([1:sig1 sig1+0.5],[L(1:sig1);0]);
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| 36 | hold on;
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| 37 | hh2 = plot([sig1+0.5 sig1+1:sig1+sig2],[0;L(sig1+1:end)],'r');
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| 38 | hold off
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| 39 | end
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| 40 | V = axis;
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| 41 | V(1) = -1;
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| 42 | V(2) = length(L)+2;
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| 43 | axis(V);
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| 44 | fontsize(16);
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| 45 | linewidth(2);
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| 46 | xlabel('Eigenvector')
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| 47 | ylabel('Eigenvalue')
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| 48 | title(tit)
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| 49 | if nargout > 1
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| 50 | h1 = hh1;
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| 51 | h2 = hh2;
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| 52 | end |
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