hi everyone. this is my code. i need some help. there is an error of matirx dimension. i don't understand why is this error..actually i could not find any error when i look at the specific line.
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m0=0.139; t1=0.265; t2=0.265; k=0.95; x2=[0.107108081791626;0.121713729308666;0.141187925998053;0.180136319376826;0.199610516066212;0.223953261927945;0.272638753651412;0.326192794547225;0.374878286270691;0.423563777994158;0.472249269717624;0.520934761441091;0.569620253164557;0.628042843232717;0.671859785783836;0.725413826679649;0.774099318403116;0.822784810126582;0.876338851022395;0.925024342745862;0.973709834469328;1.04673807205453;1.14897760467381;1.24634858812074;1.34858812074002;1.44595910418695;1.54819863680623;1.64556962025316;1.74780915287244;1.85004868549172;1.94741966893866;2.04965920155794;2.15189873417722;2.24440116845180;2.35150925024343;2.44888023369036;2.55111976630964;2.64849074975657;2.75073028237585;2.84810126582278;2.95034079844206] y2=[304132.454332542;274100.000330995;255761.923013762;207758.005340356;187248.654728073;157457.187031665;123551.434794344;100372.254954385;78758.7810181322;61799.4045294796;48491.9440197912;38050.0209139858;32001.6249604141;25998.7572449680;21119.7677081825;17763.1890702461;14939.5690481211;12564.7890399044;10207.5399695729;8584.95890483577;7475.17329729610;5666.48842328580;4149.81610573156;3038.98830028796;2149.70051640266;1574.26607638051;1152.90356751183;874.095878848067;618.312469964784;468.801254039190;355.430632449889;269.485631150122;197.356057027209;149.624213162756;113.448121418273;86.0128619506164;67.5165233928179;52.9958758667747;40.1811936069545;31.5395023553527;25.6311104863127]
y2pos=[461146.649218508;415651.484737129;361809.822084431;326103.876582922;293931.574066363;230614.991344230;180949.826259286;141990.126127200;111414.944851755;90512.6619452339;71024.6843083265;57696.0206214927;46870.2293135917;38077.0212362574;32024.3333365567;26016.3271737920;21880.7959907612;18402.6450002370;15477.3776579124;13017.1080930248;10948.6603253893;8299.25393259720;6077.90487906389;4450.96393361319;3259.63461635871;2305.70204143808;1688.56596040297;1280.26180647770;937.559774231338;686.592637388054;520.570916902141;394.680791988835;299.244895125736;219.142658864324;172.017883349496;135.026892278244;102.373219582273;80.3587244741728;60.9255031138076;49.5121414456678;38.8636613690320] y2neg=[304132.454332542;274100.000330995;255761.923013762;207758.005340356;187248.654728073;157457.187031665;123551.434794344;100372.254954385;78758.7810181322;61799.4045294796;48491.9440197912;38050.0209139858;32001.6249604141;25998.7572449680;21119.7677081825;17763.1890702461;14939.5690481211;12564.7890399044;10207.5399695729;8584.95890483577;7475.17329729610;5666.48842328580;4149.81610573156;3038.98830028796;2149.70051640266;1574.26607638051;1152.90356751183;874.095878848067;618.312469964784;468.801254039190;355.430632449889;269.485631150122;197.356057027209;149.624213162756;113.448121418273;86.0128619506164;67.5165233928179;52.9958758667747;40.1811936069545;31.5395023553527;25.6311104863127] pt111=0.01:0.01:3;
pt22=3.01:0.01:6;
pt1=pt111./sum(pt111); pt2=pt22./sum(pt22) pt=k*pt1+(1-k)*pt2
i=0; for pt=0.01:0.01:6 i=i+1;
A1=sqrt(pt111.^2+m0^2); A2=sqrt(pt22.^2+m0^2); j=0; for n=1:10 j=j+1; b1=n*A1/t1; b2=n*A2/t2; Q(j)=2*3.14*k*pt1*A1*((+1).^n+1)*besselk(1,b1)*0.01+(1-k)*(2*3.14*pt2*A2*(+1).^n+1)*besselk(1,b2)*0.01; end y10(i)=sum(Q); end
pt=0.01:0.01:6 y11=y10./sum(y10); y12=2794928*y11./pt; semilogy(pt,y12,'k') hold on
xlabel('P_{T}') ylabel('1/N_{ev} 1/2\piP_{T} d^{2}N(dP_{T}dy) (GeV/c)^{-2}') semilogy(x2,y2,'rs') hold on x2i=x2 y2i=interp1(pt,y12,x2i); kafa=y2./y2i
c=y2pos-y2neg d=c./y2i d1=c./y2 chi=((y2-y2i)./c).^2 S=sum(chi) %%%%%%%%%%%% the value of chi^2 dof=37-3 AA=S/dof
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