Compare matrix 16000 X 20000 with smaller matrix 16000X1

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Shahid Said
Shahid Said 2021-11-4
评论： Shahid Said 2021-11-4
I tried to run code to compare big matrix.but cannot get the correct answer.
A = 16,000 X 20,000 data
B = 16,000 X 1 data
i want to get value of logical at C.
I tried C = A > B but return error 'dimension not agree'
can someone tell me the correct way to code this ?
Thank you.
  1 个评论
Rik
Rik 2021-11-4
Implicit expansion was added in R2016b. Since you're using R2018a, this should work, as KSSV notes below.

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KSSV
KSSV 2021-11-4
Ran in:
It should actually work.
A = rand(5) ;
B = rand(5,1) ;
C = A > B
C = 5×5 logical array
0 0 1 0 0 1 0 0 1 1 0 0 0 0 0 1 1 0 1 1 0 0 0 0 1
If it is throwing error, try:
B = reshape(B,1,5);
C = A > B
C = 5×5 logical array
0 0 1 1 0 1 0 0 1 1 0 1 0 0 0 0 1 0 1 0 0 0 0 0 1

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