generateFeatures.m

label=1;
testr=1;
trainr=1;
trainsequence=cell(1,48);
trainlabel=ones(1,48);
testsequence=cell(1,12);
testlabel=ones(1,12);
for j=[1 4 7 8 10 15]         %% Set the Activity Number which you want to extract
    if(j==13||j==14)
        continue;
    end
for i= [1 2 3 4 5 6 7 8 9 10] %% Set the Person Number for whom you want to extaract data               
 for k=[1]                    %% Set which sequence of the activity you want to extract
        if(j<=9)
            if(i<=9)
                a=strcat('a0',int2str(j),'_s0',int2str(i),'_e0',int2str(k),'_skeleton.txt');
            else
                a=strcat('a0',int2str(j),'_s10','_e0',int2str(k),'_skeleton.txt');
            end
        else
            if(i<=9)
               a=strcat('a',int2str(j),'_s0',int2str(i),'_e0',int2str(k),'_skeleton.txt');
            else
               a=strcat('a',int2str(j),'_s10','_e0',int2str(k),'_skeleton.txt');
            end
        end
    b=dlmread(a);
    frames=b(1,1);
    data=ones(20*3,frames);
    start_index=3;
    torso_initial=b(3,[1 2 3]);
    torso_initial = ones(20,1)*(torso_initial);
    crr_frame=0;
    crr_data=ones(20,3);
    bone_vectors=ones(19,3);
    final_position=ones(20,3);
    while(crr_frame<frames)
    crr_data=b(start_index:2:start_index+38,[1,2,3]);
    relative_position = crr_data - torso_initial;
    rearranged_position = relative_position([1 1 2 3 3 5 6 7 3 9 10 11 1 13 14 15 1 17 18 19],:);
    bone_vectors = relative_position(2:20,:) - rearranged_position(2:20,:);
    segment_length = sqrt((sum((bone_vectors.*bone_vectors)'))');    
    factor=(1./segment_length).*([.05;.21;.12;.13;.186;.146;.054;.13;.186;.146;.054;.1;.245;.246;.08;.1;.245;.246;.08]);
    factor2 = [factor,factor,factor];
    scaled_bone_vector = bone_vectors.*factor2;
    final_position(1,:)=relative_position(1,:);
    final_position(2,:)=final_position(1,:)+scaled_bone_vector(1,:);
    final_position(3,:)=final_position(2,:)+scaled_bone_vector(2,:);
    final_position(4,:)=final_position(3,:)+scaled_bone_vector(3,:);
    final_position(5,:)=final_position(3,:)+scaled_bone_vector(4,:);
    final_position(6,:)=final_position(5,:)+scaled_bone_vector(5,:);
    final_position(7,:)=final_position(6,:)+scaled_bone_vector(6,:);
    final_position(8,:)=final_position(7,:)+scaled_bone_vector(7,:);
    final_position(9,:)=final_position(3,:)+scaled_bone_vector(8,:);
    final_position(10,:)=final_position(9,:)+scaled_bone_vector(9,:);
    final_position(11,:)=final_position(10,:)+scaled_bone_vector(10,:);
    final_position(12,:)=final_position(11,:)+scaled_bone_vector(11,:);
    final_position(13,:)=final_position(1,:)+scaled_bone_vector(12,:);
    final_position(14,:)=final_position(13,:)+scaled_bone_vector(13,:);
    final_position(15,:)=final_position(14,:)+scaled_bone_vector(14,:);
    final_position(16,:)=final_position(15,:)+scaled_bone_vector(15,:);
    final_position(17,:)=final_position(1,:)+scaled_bone_vector(16,:);
    final_position(18,:)=final_position(17,:)+scaled_bone_vector(17,:);
    final_position(19,:)=final_position(18,:)+scaled_bone_vector(18,:);
    final_position(20,:)=final_position(19,:)+scaled_bone_vector(19,:);
    data(:,crr_frame+1)=final_position(:);
    crr_frame=crr_frame+1;
    start_index=start_index+41;
    end
    new_data=ones(120,frames);
    new_data(1:60,:)=data;
    new_data(61:120,1)=zeros(60,1);
    new_data(61:120,2:frames)=data(:,2:frames)-data(:,1:frames-1);
    %if(j<=12)
     %   label=j-1;
    %else
     %   label=j-3;
    %end 
    switch(j)
        case 1 
            label=0;
           % break;
        case 4
            label=1;
           % break;
        case 7
            label=2;
           % break;
        case 8
            label=3;
           % break;    
        case 10
            label=4;
            %break;
        case 15
            label=5;
    end
 %   disp('this is alright');
    if(i>=3)                                           %% Set the Person Number you want to put in the train sequence 
        trainsequence{1,trainr}=new_data;
        trainlabel(1,trainr)=label;
        trainr=trainr+1;
    else                                               %% Rest all person are put in the test sequence
        testsequence{1,testr}=new_data;
        testlabel(1,testr)=label;
        testr=testr+1;
    end
   % save(strcat('a02_s10_e01_skeleton_data'),'data');
   % save(strcat('a02_s0',int2str(i),'_e02_skeleton_data'),'data');
    
 end
end
end