how to caculate covariance matrix?

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bay rem
bay rem 2015-12-10
评论： Walter Roberson 2015-12-10
i tried to calculate covariance of matrix but an error appeared:
here is my matrix (3*3):
m=
26 197 27 197 28 197
26 196 27 196 28 196
26 195 27 195 28 195
where(26,197) describe piwel's position
and this is the error:
Error using bsxfun
Mixed integer class inputs are not supported.
Error in cov (line 154)
xc = bsxfun(@minus,x,sum(x,1)/m); % Remove mean
Error in fourptm (line 155)
c=cov(m)

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Walter Roberson
Walter Roberson 2015-12-10
cov(double(m))
  2 个评论
bay rem
bay rem 2015-12-10
thank you so much i already tried it, but Is it right to find such result:
0 0 0 0 0 0
0 1 0 1 0 1
0 0 0 0 0 0
0 1 0 1 0 1
0 0 0 0 0 0
0 1 0 1 0 1

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