# Creating Bins in a Histogram

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jgillis16 il 12 Ott 2015
Risposto: Star Strider il 12 Ott 2015
I have a data set with the first column being the years and the second column being the distances. I need to create a histogram that bins how many of these distances occur during the same year, and then occurring every 10 years. (For example, 1880-1890 0, 1890-1900 1, 1900-1910 1).
I have attached the text file.
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### Risposta accettata

Star Strider il 12 Ott 2015
You have one year recorded for each distance, so do the histogram on the years. This doesn’t account for the distances (I’m not exactly certain how to fit them into a histogram by year in the absence of plot3, if you want to somehow include them), but will plot the histogram of the discoveries by year and decade.
The code:
fidi = fopen('jgillis16 oo20copy.txt', 'rt');
Dc = textscan(fidi, '%f%f', 'CollectOutput',1, 'TreatAsEmpty','~');
fclose(fidi);
D = cell2mat(Dc);
years = D(:,1);
distances = D(:,2);
yrbin = [min(years):max(years)]-0.5;
dcbin = 10*[floor(min(years)/10) : 1 : floor(max(years)/10)]+5;
figure(1)
subplot(2,1,1)
hist(years, yrbin)
grid
subplot(2,1,2)
hist(years, dcbin)
grid
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### Più risposte (1)

Image Analyst il 12 Ott 2015
The data you posted really doesn't have enough observations per decade to make a good histogram. There are just a handful per decade and usually only one or 2 per year. Nonetheless, you can use hist3() in the Stats toolbox to give counts per decade, and then per year in each decade.
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jgillis16 il 12 Ott 2015
I would've used hist3, except I dont have the stats toolbox. Any other suggestions?

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