1 | %'set_col_vec': % sets the color code for vectors depending on a scalar and input parameters (used for plot_field)
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2 | %-----------------------------------------------------------------------
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3 | %function [colorlist,col_vec,minC,ColCode1,ColCode2,maxC]=colvec(colcode,vec_C)
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4 | %-----------------------------------------------------------------------
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5 | %OUTPUT
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6 | %colorlist(nb,3); %list of nb colors
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7 | %col_vec, size=[length(vec_C),3)];%list of color indices corresponding to vec_C
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8 | %minC, maxC: min and max of vec_C
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9 | %ColCode1, ColCode2: absolute threshold in vec_C corresponding to colcode.ColCode1 and colcode.ColCode2
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10 | %INPUT
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11 | % colcode: struture setting the colorcode for vectors
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12 | % colcode.CName: 'ima_cor','black','white',...
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13 | % colcode.ColorCode ='black', 'white', 'rgb','brg', '64 colors'
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14 | % colcode.CheckFixVecColor =0; thresholds scaling relative to min and max, =1 fixed thresholds
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15 | % colcode.MinVec; min
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16 | % colcode.MaxVec; max
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17 | % colcode.ColCode1: first threshold for rgb, relative to min (0) and max (1)
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18 | % colcode.ColCode2: second threshold for rgb, relative to min (0) and max (1),
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19 | % rmq: we need min <= ColCode1 <= ColCode2 <= max, otherwise
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20 | % ColCode1 and ColCode2 are adjusted to the bounds
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21 | % vec_C: matlab vector representing the scalar setting the color
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22 | function [colorlist,col_vec,colcode_out]=set_col_vec(colcode,vec_C)
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23 | col_vec=ones(size(vec_C));%all vectors at color#1 by default
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24 |
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25 | if ~isstruct(colcode),colcode=[];end;
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26 | colcode_out=colcode;%default
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27 | if isempty(vec_C) || ~isnumeric(vec_C)
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28 | colorlist=[0 0 1]; %blue
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29 | return
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30 | end
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31 |
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32 | %% uniform color plot
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33 | check_multicolors=0;
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34 | %default input parameters
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35 | if ~isfield(colcode,'ColorCode') || isempty(colcode.ColorCode)
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36 | colorlist=[0 0 1]; %blue
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37 | else
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38 | if strcmp(colcode.ColorCode,'black')
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39 | colorlist(1,:)=[0 0 0];%black
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40 | elseif strcmp(colcode.ColorCode,'white')
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41 | colorlist(1,:)=[1 1 1];%white
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42 | else
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43 | check_multicolors=1;
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44 | end
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45 | end
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46 |
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47 | if check_multicolors
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48 | if (isfield(colcode,'CheckFixVecColor') && isequal(colcode.CheckFixVecColor,1))
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49 | minC=colcode.MinVec;
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50 | maxC=colcode.MaxVec;
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51 | else
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52 | minC=min(vec_C);
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53 | maxC=max(vec_C);
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54 | end
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55 | colcode_out.MinC=minC;
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56 | colcode_out.MaxC=maxC;
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57 | if strcmp(colcode.ColorCode,'rgb')|| strcmp(colcode.ColorCode,'bgr')% 3 color representation
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58 | if isfield(colcode,'ColCode1')
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59 | colcode_out.ColCode1=colcode.ColCode1;
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60 | else
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61 | colcode_out.ColCode1=minC+(maxC-minC)/3;%default
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62 | end
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63 | if isfield(colcode,'ColCode2')
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64 | colcode_out.ColCode2=colcode.ColCode2;
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65 | else
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66 | colcode_out.ColCode2=minC+2*(maxC-minC)/3;%default
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67 | end
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68 | colorlist(2,:)=[0 1 0];%green
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69 | col_vec(vec_C < colcode_out.ColCode1)=1;% vectors with vec_C smaller than ColCode1 set to the first color (r or b)
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70 | col_vec((vec_C >= colcode_out.ColCode1) & (vec_C < colcode_out.ColCode2))=2;% select green vectors
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71 | col_vec(vec_C >= colcode_out.ColCode2)=3;
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72 | if strcmp(colcode.ColorCode,'rgb')
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73 | colorlist(1,:)=[1 0 0];%red
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74 | colorlist(3,:)=[0 0 1];%blue
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75 | else
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76 | colorlist(1,:)=[0 0 1];%blue
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77 | colorlist(3,:)=[1 0 0];%red
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78 | end
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79 | else
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80 | colorjet=jet;% ususal colormap from blue to red
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81 | sizlist=size(colorjet);
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82 | indsel=ceil((sizlist(1)/64)*(1:64));
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83 | colorlist(:,1)=colorjet(indsel,1);
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84 | colorlist(:,2)=colorjet(indsel,2);
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85 | colorlist(:,3)=colorjet(indsel,3);
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86 | sizlist=size(colorlist);
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87 | nblevel=sizlist(1);
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88 | col2_1=maxC-minC;
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89 | col_vec=1+floor(nblevel*(vec_C-minC)/col2_1);
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90 | col_vec=col_vec.*(col_vec<= nblevel)+nblevel*(col_vec >nblevel);% take color #nblevel at saturation
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91 | col_vec=col_vec.*(col_vec>= 1)+ (col_vec <1);% take color #1 for values below 1
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92 | end
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93 | end
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