How to use the several average of same class

1 Ansicht (letzte 30 Tage)
Kong
Kong am 5 Apr. 2020
Bearbeitet: Kong am 6 Apr. 2020
Hello.
I have a data (90 x 2857), column 2857 is a label(class).
I want to select 5 rows of the same classes randomly and compute the mean of each 5 rows.
(10 Combination 5)
So I want to get all possible combinations' average values of the same classes.
In this code, I computed all rows of the same class and got one average value.
Could you explain how to fix the code?
data = csvread('outfile.csv');
values = data(:,1:end-1);
labels = data(:,end);
avg = splitapply(@(x) {mean(x,1)}, values, labels+1);

Akzeptierte Antwort

David Hill
David Hill am 5 Apr. 2020
a=randi(size(values,1),5,1);%randomly choose 5 rows
avg=mean(values(a,:),2);%compute mean of the rows
  5 Kommentare
David Hill
David Hill am 5 Apr. 2020
b=randperm(length(avg),5);
for k=1:5
a(k)=mean(avg{b(k)});
end
Kong
Kong am 5 Apr. 2020
Thank you so much. I got this error.
data = csvread('outfile.csv');
values = data(:,1:end-1);
labels = data(:,end);
avg = splitapply(@(x) {mean(x,1)}, values, labels+1);
a=mean(avg{randi(length(values),1)});
b=randperm(length(avg),5 );
for k=1:5
a(k)=mean(avg{b(k)});
end

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (0)

Kategorien

Mehr zu Matrices and Arrays finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by