How can I calculate the mean of a vector ?

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Mallouli Marwa
Mallouli Marwa el 12 de Jul. de 2018
Comentada: Guillaume el 12 de Jul. de 2018
Hi
How can I calculate the mean of a vector ?
V_freq1 = 2*abs(VOLT1(6:NFFT/64))./( 2*abs( DISP1 (6:NFFT/64) ).*(2*pi*10)^2);
VOLT1, disp1 are vectors.
Please help me Best,
  3 comentarios
Mallouli Marwa
Mallouli Marwa el 12 de Jul. de 2018
Mean (V_freq1)
An error is appeared
Torsten
Torsten el 12 de Jul. de 2018
mean, not Mean

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Respuesta aceptada

KSSV
KSSV el 12 de Jul. de 2018
mean(V_freq1)
If your data has NaN's..have a look on nanmean.
% mean with inbuilt command
a = rand(100,1) ;
themean = 0 ; % the mean
for i = 1:length(a)
themean = themean+a(i) ;
end
themean = themean/length(a) ;
  3 comentarios
Steven Lord
Steven Lord el 12 de Jul. de 2018
The 'omitnan' option for mean was introduced in release R2015a.
Guillaume
Guillaume el 12 de Jul. de 2018
Steven, it's a long standing request of mine that this be documented in the function doc (just under the Introduced in ...). It would greatly help in writing backward compatible code.

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Más respuestas (1)

Jan
Jan el 12 de Jul. de 2018
Editada: Jan el 12 de Jul. de 2018
Or:
m = sum(V_freq1) / numel(V_freq1)
Good ideas to solve such problems:
docsearch mean
help mean
Internet search engine: "Matlab mean"
For old Matlab versions and ignoring NaNs:
index = ~isnan(v);
m = sum(v(index)) / sum(index)

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