How to change axis size without affecting bin size

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Andrew Stark 2020-11-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/664138-how-to-change-axis-size-without-affecting-bin-size

评论： Andrew Stark 2020-11-28

n=100;
for i=1:3000
ZZ=Zf{i};
DD=Df{i};
Zf2=linspace(min(ZZ(:)),max(ZZ(:)),n);
Df2=linspace(min(DD(:)),max(DD(:)),n);
Zfr=interp1(Zf2,1:numel(Zf2),ZZ,'nearest');
Dfr=interp1(Df2,1:numel(Df2),DD,'nearest');
zm=accumarray([Dfr Zfr],1,[n n]);
surf(zm);
hold on
end

This code generates the following histogram

How do I modify the x and y axis to make them go up until the max of Dfr and Zfr but still have the number of bins remain 100?

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采纳的回答

Walter Roberson 2020-11-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/664138-how-to-change-axis-size-without-affecting-bin-size#answer_557213

在 MATLAB Online 中打开

[Zf_S, Zf_L] = cellfun(@(B) bounds(B, 'all'), Zf);
Zf_max = max(Zf_L);
Zf_min = min(Zf_S);
Zf_vals = linspace(Zf_min, Zf_max, n);
[Df_S, Df_L] = cellfun(@(B) bounds(B, 'all'), Df);
Df_max = max(Df_L);
Df_min = min(Df_S);
Df_vals = linspace(Df_min, Df_max, n);

Now do your interpolation with respect to Zf_vals and Df_vals instead of with respect to a vector that changes each time.

Hint: discretize() instead of interpolation .

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Andrew Stark 2020-11-28

在 MATLAB Online 中打开

My apologies for the banana plot the following code was used

for i=1:1
Zf2=Zf{i};
Df2=Df{i};
plot(Df2,Zf2)
hold on
end

Whereas for the histogram the code was

n=100;
[Zf_S, Zf_L] = cellfun(@(B) bounds(B, 'all'), Zf);
Zf_max = max(Zf_L);
Zf_min = min(Zf_S);
Zf_vals = linspace(Zf_min, Zf_max, n);
[Df_S, Df_L] = cellfun(@(B) bounds(B, 'all'), Df);
Df_max = max(Df_L);
Df_min = min(Df_S);
Df_vals = linspace(Df_min, Df_max, n);
for i=1:1
    ZZ = Zf{i};
    DD = Df{i};
    
    Zfr = discretize(ZZ, Zf_vals);
    Dfr = discretize(DD, Df_vals);
    zm = accumarray([Dfr Zfr], 1, [n n]);
    surf(Df_vals, Zf_vals, zm);
    hold on
end