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how to apply Position repeatedly without a loop?

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  how to apply Position repeatedly without a loop? steveh44 <steve_h44@yahoo.com> - 2011-05-07 10:21 +0000

#2214 — how to apply Position repeatedly without a loop?

i have matrix A and wanted to find the Positions in this matrix of
some elements which listed in some another vector.

how to use Position to do it without a loop?

I tried this:

In[192]:= A={{1,2,3},
{3,4,5},
{6,7,8}};
elements={3,6};

Position[A,r[[1]]]
Out[194]= {{1,1}}

Position[A,r[[2]]]
Out[197]= {{1,2}}

but I want to do something like

Position[A,r]
but this does not work.

I tried Map, Thread, etc.. but could not get it to work. not sure what
the syntax is.

thanks for help
steve

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