How to change axis size without affecting bin size

1 vue (au cours des 30 derniers jours)
Andrew Stark
Andrew Stark le 26 Nov 2020
Commenté : Andrew Stark le 28 Nov 2020
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?

Réponse acceptée

Walter Roberson
Walter Roberson le 27 Nov 2020
[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 .
  9 commentaires
Andrew Stark
Andrew Stark le 28 Nov 2020
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
Andrew Stark
Andrew Stark le 28 Nov 2020
Additionally what is the best command to use in a for loop that will continuously add up the zm arrays

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Feature Detection and Extraction dans Help Center et File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by