how to solve a problem about marginal

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Skydriver
Skydriver 2019-4-22
评论： Walter Roberson 2019-9-15
I have a coding :
h_data = [0; 0.1568; 0.2112; 0.264; 0.3403; 0.469; 0.58; 0.7];
% deltaPGA = h_data(2:8) - h_data(1:7);
Mwgrid = 4.35:0.3:9.15;
amaxgrid = linspace(0,3,36); %0:0.01:3;
grid = meshgrid(Mwgrid,amaxgrid);
PGAgrid = 0.19:0.02:0.39;
for i=1:length(h_data)-1
%calculating Conditional Probability(Mw given PGA>h) in equation (5)
pdfMwPGAh = marginal(:,i);
%calculating Pr(amax,PGA>h) in equation (9)
[PGA_temp,~] = hist(PGA,PGAgrid);
pdfPGA = PGA_temp/sum(PGA_temp);
%calculating joint probability between amax and PGA in equation (9)
%p(amax,PGA)={1/amaxSigln(amax)(2phi)^1/2
%exp[-{ln(amax)-Mln(amax)^2/2Sig^2ln(amax)]Deltaamax}p(PGA)
pdfamaxPGA=zeros(length(amaxgrid),length(PGAgrid));
for j=1:length(amaxgrid)
for k=1:length(pdfPGA)
if PGAgrid(k)>h_data(i+1)
pdfamaxPGA(j,k)=lognpdf(amaxgrid(j),-0.15+(-0.13+1)*log(PGAgrid(k)),0.52).*0.01.*pdfPGA(k);
end
end
end
%Sum Joint Probability between amax and PGA in equation (8)
pdfamaxPGAh = sum(pdfamaxPGA');
%determine conditional probability in equation (7)
if sum(pdfamaxPGAh)~=0
pdfamaxPGAh = pdfamaxPGAh/sum(pdfamaxPGAh);
end
%calculating Pr(amax,Mw,PGA>h) = Pr(amax,PGA>h)*Pr(Mw given
%PGA>h)formulation (5)
for j=1:length(amaxgrid)
for k=1:length(pdfMwPGAh)
pdfamaxMwPGAh(j,k,i)= pdfamaxPGAh(j)*pdfamaxPGAh(j) * pdfMwPGAh(k);
end
end
end
Is there any one can help to solve my problem
Index in position 2 exceeds array bounds (must not exceed 1).
Error in jointpdf_Mw_amax_Juang (line 22)
pdfMwPGAh = marginal(:,i);
  1 个评论
Walter Roberson
Walter Roberson 2019-9-15
You do not show us how you created marginal . As outside observers, we have no reason to expect that it will be any particular size.

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