creating a histogram in a specific way

Question

alex 2011-12-14

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https://ww2.mathworks.cn/matlabcentral/answers/23970-creating-a-histogram-in-a-specific-way

hi, I want to make a histogram that gets a vector with values from the group (0 1 10 100, and creates a histogram that has one bin for each of those values and has the axis of x also sorted only for those values. I tried few things and nothing seems to work. I wand the bins in the same width.

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Answer 1

the cyclist 2011-12-14

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https://ww2.mathworks.cn/matlabcentral/answers/23970-creating-a-histogram-in-a-specific-way#answer_31433

在 MATLAB Online 中打开

r = [0 0.1 0.2 0.3 1 2 3 10 20 30 40 50 60 70 80 90];
bins = [0 1 10 100];
count=hist(r,bins)
figure
bar(bins,count)
set(gca,'XTick',bins)

OR

r = [0 0.1 0.2 0.3 1 2 3 10 20 30 40 50 60 70 80 90];
bins = [0 1 10 100]
count=hist(r,bins)
figure
bar(1:4,count)
set(gca,'XTickLabel',bins)

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the cyclist 2011-12-14

If you use either of these solutions, do be aware of the issue that Sean brings up, which is whether you want the binning itself to be on a log scale. The binning in my solution is on a linear scale (even in the solution in which I display the results on what is essentially a log scale).

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Answer 2

Sean 2011-12-14

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Are you trying to bin on a log scale or are you trying to bin to arbitrary values?

If you are trying to do the first, you might try taking the log10() of all your input values and binning them linearly (i.e. less than 1 is negative, 1-9.9999 is is 0-1, 10-99.9999 is 1-2, etc.) You could round the values to fall into whichever bin you wanted.