row from matrix by argument

hi

i have taken an argument from matrix B (the maximun value from column)

now i want to the take the row that the argument is shown in and make from it a vector.

how can i do it ?

thanks

tal shmuel

Answer 1

[dpb]

m=randi(200,4)                % sample data
m =
   125    95    46    63
   118    47    35   185
    42   169    46    87
    61    39    88    37

The engine:

[~,v]=max(m);

yields

>> v =
     1     3     4     2
>> 

ADDENDUM:

Ok, latest guess as I thought prior was unlikely...let me try one more time to see if follow...

[~,ix]=max(m(:));                % index of overall maximum in matrix m
[r,c]=ind2sub(size(m),ix);       % convert index to row,column location in m
v=m(r,:)                         % row of m corresponding to that location

result for above sample m is:

>> v =
   118    47    35   185
>> 

That what you looking for?

[dpb]

OP Answer moved to Comment...dpb

thanks !

in your example i can see the max value in the matrix is 185 at m[2,4]

after the find of the max argument i want to make a vector from its row

thats my problem

[dpb]

Then I don't understand the question.

Variable v is the row of the maxima of each colum.

The max of the first column is 125 in row one which is the value of v(1) while v(4) is 4 to match it.

[tal shmuel]

just to clearly me question,

i have a big matrix. the results of the matrix is the last column (the maximum value that i search)

when i find the maximun value i want to export all the row that its inclulded for and make from the row a vector that its size like the raw size matrix.

[dpb]

OK, see if my latest update above hits the target...