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count how many times the element occur in a list

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pammy
pammy am 13 Mär. 2013
like i have the following code for the above:
function count
clc;
a=[1 2 3 3 4 5 5 5 5 5 6 6 6 6];
u=unique(a);
for n=1:length(u)
answer(n,:)=[u(n) length(find(a==u(n)))];
end
disp(answer);
end
output is:
1 1
2 1
3 2
4 1
5 5
6 4
i want to find the maximum value from the list (1 1 2 1 5 4) i.e from the 2nd column of the output...
2nd column of output displays the number of times the given element occurs.
can anyone tell me how to solve it?

Akzeptierte Antwort

Walter Roberson
Walter Roberson am 13 Mär. 2013
[maxcount, maxidx] = max(answer(:,2));
answer(maxidx,1), 'occurred', maxcount

Weitere Antworten (1)

Image Analyst
Image Analyst am 13 Mär. 2013
That's just the histogram:
% Create sample data.
a=[1 2 3 3 4 5 5 5 5 5 6 6 6 6 9 9 11 11 18]
% Get the histogram with bins every 1 wide from 1 to the max value of a.
numberOfBins = max(a)-min(a)+1 % Assumes integer a values.
counts = hist(a, numberOfBins)
% Find out where the histogram is maximum.
[maxValue, maxIndex] = max(counts)
% Print out information to the command line.
fprintf('The most frequently occurring number is %d, which occurs %d times.\n',...
maxIndex, maxValue);
In the command window:
a =
1 2 3 3 4 5 5 5 5 5 6 6 6 6 9 9 11 11 18
numberOfBins =
18
counts =
1 1 2 1 5 4 0 0 2 0 2 0 0 0 0 0 0 1
maxValue =
5
maxIndex =
5
The most frequently occurring number is 5, which occurs 5 times.
  2 Kommentare
pammy
pammy am 14 Mär. 2013
Bearbeitet: pammy am 14 Mär. 2013
shows error in line 6
error using hist
Too many input arguments.
Error in hist (line 6)
counts = hist(a,numberOfBins)
Image Analyst
Image Analyst am 14 Mär. 2013
You probably redefined hist to be a variable in your program, thus blowing away the built-in function. What do these say:
whos hist
which -all hist

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