How to delete repeating column or duplicate column in MATLAB? of type Double

Hi,

How to delete the repeating or duplicate columns in matrix, is there any function in MATLAB?, for example in the input array row 2 are basically the occurance or row 1 values, so i am basically counting how many times that partiuclar value in row 1 has appeared in row 1.

Thanks in Advance

input array:
     2    2    5    1    1   3   4    3    4
     2    2    1    2    2   2   2    2    2
output array:
     2  5  1  3  4
     2  1   2  2  2
or more precise
   1 2 3 4 5
   2 2 2 2 1

[the cyclist]

Is the "more precise" one like that because it is sorted by the top row?

Is there any special way to handle repeated values in the top row?

[raghavendra kandukuri]

The More precise is the sorted order of ouput array

Answer 1

[Matt J]

output_array=unique(input_array.','rows').'

[Jos (10584)]

output_array = unique(input_array.', 'rows', 'stable').'
more_precise = unique(input_array.', 'rows').'

:D

[raghavendra kandukuri]

Perfect@ Jos, Thanks alot!!!!!!

[Jos (10584)]

all credits to Matt J, of course!

[omran alshalabi]

how to code to delet repeating value in a row like this:

from

a = [1 2 2 4 4 2 2 1 1 4 4 ] 

become

b = [1 2 4 2 1 4]

[dpb]

This really should be a new Q? because to Answer here isn't responsive to the original -- but...

a = [1 2 2 4 4 2 2 1 1 4 4 ] ;
ix=find(diff(a));
a([1 ix+1])

ans = 1×6

1 2 4 2 1 4

Answer 2

[dpb]

>> uA=unique(A);
>> B=[uA;histc(A,uA)]
B =
     1     2     3     4     5
     2     2     2     2     1
>> 

ADDENDUM: Above works with only the first row and computes the counts on the presumption they had to have been obtained somewhere before to have been posted...