据我所知，你没有关闭的形式为您的联合pdf，但“只有数据”。使用Matlab，你确实可以使用这个工具命名为hist3

% Generate random data
nData = 1e5;
data = zeros(2,nData);
m1 = 0; m2 = 1;
s1 = 1; s2 = 2;
for i=1:nData
    d1 = m1+s1*randn;
    d2 = m2+s2*randn;
    data(:,i) = [d1; d2];
end

% hist3 will bin the data
xi = linspace(min(data(1,:)), max(data(1,:)), 50);
yi = linspace(min(data(2,:)), max(data(2,:)), 50);
hst = hist3(data,{xi yi}); %removed extra '

% normalize the histogram data
dx = xi(2)-xi(1);
dy = yi(2)-yi(1);
area = dx*dy;
pdfData = hst/sum(sum(hst))/area;

% plot pdf
figure(2); clf
contour(xi,yi,pdfData);

希望这对你有帮助。