Finding distinct values in a column of a matrix

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divya r
divya r 2012-6-29
评论： Abdulaziz Abutunis 2021-8-18
I have a 81*4 matrix. I want to find the distinct values only in the first column, which can also be seen as the first column of every row.
eg: a= 2 3
4 3
4 5
2 3
ans should be = 2
4
unique() is of no use here, it supports only whole row distinction.

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Walter Roberson
Walter Roberson 2012-6-29
unique( a(:,1) )
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Abdulaziz Abutunis
Abdulaziz Abutunis 2021-8-18
Hi Walter,
I hope you are well.
Can we maintain full arrays corresponding to these unique vlaues
Thanks
Aziz

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