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i want to store elements in matrix and call number wise but there call in workspace it seems undefined function and consider only last entry

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for d=1:18
parent=bitand(entry(d), 2.^(7:-1:0)) > 0;
end
(there is entry(18*1) matrix it has 18 decimal number)
when i apply this code than this all rows named as 'parent' but i want to call parent(11)it shown error how i call particular raw from this created parent matrix and only parent call than i shown only last entry as consider value

回答(1 个)

dpb
dpb 2016-12-13
mask=8:-1:1;
parent=bsxfun(@bitget,entry,mask);
NB: Your logic for >1 is in error unless you don't want to report the LSB being set.
Also bitand and computing a power is much less efficient that just checking the bit position directly via bitget (altho must reverse order to reproduce your result).
Your code fails because you don't assign an indexing expression for the computed parent array the code will generate.
N=length(entry);
parent=zeros(N,8); % preallocate
for i=1:N
parent(i,:)=...
...
But, "the Matlab way" is to use vectorized solution as shown instead.

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