MATLAB: Finding the position of valaue

MATLABsort

i have two values 
A=[50 90 45 10 5 15 20];
B=[10 90 45 50 5 20 15];
   I have to find the position of A in B ,for example position of 50 in B is 4,position of 90 in B is 2
so the output will be
c=4 2 3 1 5 7 6
please provide assistance

Best Answer

 out=arrayfun(@(x) find(B==A(x)),1:numel(A))

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MATLAB: Reorder a matrix relative to another

Assuming that the values in both of a and b are unique, and that they each contain exactly the same values, then the vector b original question needs have the second 50 replaced with a 30, like this:

>> a = [5;20;50;30;10];
>> x = [1;2;3;4;5];
>> b = [10;50;5;20;30];
>> c = [44;22;11;88;55];

Then the solution is very easy using MATLAB's indexing ability:

>> [~,xx] = sort(a);
>> [~,yy] = sort(b);
>> d(xx) = c(yy)
d =
  11    88    22    55    44

Which matches the desired output [11;88;22;55;44]. Note that this requires that the values in a and b are unique!

MATLAB: I want to find vector of determinants

Your code is correct, you can use arrayfun function

out=arrayfun(@(x) det([a(x) b(x);c(x) d(x)]),1:numel(a))

Best Answer

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MATLAB: Reorder a matrix relative to another

MATLAB: I want to find vector of determinants

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