How to control number of element or number of unique element in Matrix?
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x= [15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 0];%Initial guess
a = unique(x); % unique elements
[countingofangles, Thetaangles] = hist(x,unique(x)); % Unique Theta and counting of theta
A = Thetaangles; % Theta used in initial guess x
c = countingofangles; %No of theta used in initial guess x
y = repmat(x,numel(a),1); %repeat x matrix
y(:,end) = a'; %replace last column by transpose(a)
output
A =
-45 -30 0 15 30 45 60 90 %Theta used in x
c =
3 3 3 3 2 3 3 2 %Number of theta corresponding to A
y =
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 -45
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 -30
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 0
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 15
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 30
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 45
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 60
15 30 45 60 -45 -30 0 90 15 30 45 60 -45 -30 0 90 15 45 60 -45 -30 90
I want to eliminate/delete that row which contains no of theta/counting of theta/angles(15,30, 45 etc) less than 3
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the cyclist
il 28 Feb 2016
I'm not 100% certain I understand your question, but I think this does what you want:
y(c<3,:) = [];
7 Commenti
Image Analyst
il 29 Feb 2016
Generally you would NOT want to throw out bins at various places in the histogram. It would make it very difficult and deceiving to try to use the arrays afterwards.
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