How to do boxplot for vectors with different sizes
조회 수: 21 (최근 30일)
이전 댓글 표시
I have four vectors (A1, A2, A3, A4) which have different length, I am trying to generate boxplot for these data:
boxplot([A1, A2, A3, A4], 'notch', 'on', 'color', [0 0 0], 'outliersize',0, 'labels',{'data1', 'data2', 'data3', 'data4'});
but I have an error: Error in boxplot (line 286) [groupIndexByPoint,groupVisibleByPoint,labelIndexByGroup,gLevelsByGroup,...
Does anyone know what is wrong?
댓글 수: 0
채택된 답변
Brendan Hamm
2015년 8월 11일
You are passing in all of your data as one big long row vector (that is A1,...,A4 are all row vectors and you concatenate to a larger row vector with [A1,A2,A3,A4]), but boxplot treats different columns as different variables, or in the case of a row vector it will treat this as many observations from a single variable. This is fine (excepting that it does not have the results you want) but you then provide 4 labels and thus the error. For this reason you need to pass in a grouping variable as well, which will describe which group the data came from:
G = [ones(size(A1)) 2*ones(size(A2)) 3*ones(size(A2)) 4*ones(size(A2))];
X = [A1, A2, A3, A4];
boxplot(X,G,'notch','on','colors',[0 0 0],'symbol','','labels'{'data1','data2','data3','data4'});
Note, if you want to get rid of the outliers you want to set the symbol to the empty string as opposed to setting the outliersize to 0.
댓글 수: 2
추가 답변 (1개)
Foroogh Hajiseyedjavadi
2018년 6월 16일
편집: Foroogh Hajiseyedjavadi
2018년 6월 16일
Thanks, @Brendan Hamm for the help. I had a large dataset and the method you posted worked great, just needed to work on it a bit to make it more generic for a large data. I share this code based on your help, in case anyone else is dealing with a large dataset like me. hope it helps!:)
grp=[]; %grouping matrix
for n=1:45
grp=vertcat(grp,n*ones(sizes(n),1));%sizes is a variable with n column each column stores the size of each variable
end
figure();
boxplot(cell2mat(speeddata(~cellfun(@isempty,speeddata))),grp)%speeddata is a cell array with 45 columns of data, each column with different size
댓글 수: 0
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!