How to find points 3 std away from the mean in vector
26 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Olga
el 9 de Sept. de 2014
Comentada: Image Analyst
el 19 de Ag. de 2020
Hello,
Could you please help me to find a way how to find the points which are 3 std away from the mean in vector?
0 comentarios
Respuesta aceptada
Image Analyst
el 9 de Sept. de 2014
Editada: Image Analyst
el 9 de Sept. de 2014
Assuming you really mean " more than 3 standard deviations away from the mean"...
% Get the mean and standard deviation of the vector
theMean = mean(yourVector);
stdDev = std(yourVector);
% Get a logical vector of the locations where the value is more than 3 sd away from the mean.
locationsAwayFromMean = abs(yourVector - theMean) > stdDev;
% Extract only those elements
outlierValues = yourVector(locationsAwayFromMean);
4 comentarios
Filippe Frulli
el 19 de Ag. de 2020
Editada: Filippe Frulli
el 19 de Ag. de 2020
May I please ask how exactly is the 3*standard deviations calculated?
Based on my interpretation of Image Analyst's solution, I only see 1 standard deviation being calculated. I would really appreciate clarification.
Shouldn't it be
locationsAwayFromMean = abs(yourVector - theMean) > 3*stdDev?
Más respuestas (0)
Ver también
Categorías
Más información sobre Elementary Math en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!