cdfplot and ecdf differences

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Shahil Khan
Shahil Khan 2021-8-15
评论： Shahil Khan 2021-8-15
Im having some difficulty distinguishing the differences between ecdf and cdfplot. I understand that ecdf calculates it and cdfplot calculates and plots it. The plots they generate are different and produce different stats (mean, median, etc)
My question is, which one is more applicable to use? Are there any differences between these two commands?. Code and graphs to follow.
s = stats_table.Circularity;
histogram(s, 'BinWidth',0.09, ...
'Normalization','cdf')
figure
[f,x] = ecdf(s);
hold on;
plot(x,f)
histogram(s, 'BinWidth',0.09, ...
'Normalization','cdf')
hold off
figure
hold on
[h, stats] = cdfplot(s);
histogram(s, 'BinWidth',0.09, ...
'Normalization','cdf')
hold off

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采纳的回答

Ive J
Ive J 2021-8-15
编辑：Ive J 2021-8-15
Ran in:
They're the same (see cdfplot doc), the empirical CDF values are supposed to be used in stairs and not plot (smoothed)
rng('default') % For reproducibility
y = evrnd(0,3,100,1);
cdfplot(y)
hold on
[f, x] = ecdf(y);
stairs(x, f, 'r--')
legend('cdfplot', 'ecdf')

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