Binning for a histogram.

I am unable to find an effecive method to bin the following data.

11.8652   3.5891

12.5513   6.6741

11.8652   3.5891

8.8125    1.1711

8.8125    2.3422

8.8125    1.1711

5.7598    0.3324

5.0737    0.9444

5.7598    0.3324

12.5513   6.6741

14.1000   19.0596

12.5513   6.6741

8.8125    2.3422

0.0000    0.0000

8.8125    2.3422

5.0737    0.9444

3.5250    7.2712

5.0737    0.9444

11.8652   3.5891

12.5513   6.6741

11.8652   3.5891

8.8125    1.1711

8.8125    2.3422

8.8125    1.1711

5.7598    0.3324

5.0737    0.9444

5.7598    0.3324

For example I am trying to

Energy  =  Sum

14.1000 = 19.0596

12.5513 = 6.6741 + 6.6741 + 6.6741 + 6.6741

11.8652 = 3.5891 + 3.5891 + 3.5891 + 3.5891

8.8125 = 1.1711 + 1.1711 + 1.1711 + 1.1711 + 2.3422 + 2.3422 + 2.3422 + 2.3422

so on and so forth

I would like to then plot(Energy,Sum) while not repeating the Energy. I cannot find away to do this. I appreciate the help.

[Doug Hull]

huh? It is not clear what you are doing.

Answer 1

[Walter Roberson]

[uvals, a, uidx] = unique(YourData(:,1));
Sum = accumarray(uidx, YourData(:,2));
plot(uvals, Sum)

[Chad]

Very nice...it works great!

Answer 2

[Hin Kwan Wong]

Make an array with A=[energy sum] Then use:

A=sortrows(A);
hist(A(:,2),A(:,1))