画图基本思路:准备数据,画图

首先准备数据:

统计散点频率

%频率统计
x = chuntian(:,1);
y = chuntian(:,2);
%max(c(:,1))
Xedges = 0:500;
Yedges = 0:500;
N = histcounts2(x,y,Xedges,Yedges)
sum(sum(N))


x_cent_point = [0.5:1:499.5];
y_cent_point = [0.5:1:499.5];
n = 0;
for i = 1:500
    for j = 1:500
        n = n + 1;       
        x_p(n) = x_cent_point(i);
        y_p(n) = y_cent_point(j);
        z_p(n) = N(i,j);
    end
end

result = [x_p', y_p', z_p'];

保存结果result,EXCEL里去掉频数是0的行。

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