Dear list,

    I have two martix like these, each rows with name in the matrix. 

    I try to select rows with identical name from two matrix and calculate their correlation.

Matrix1:
2-Sep    9     5.5    1     7.18     10.0    8     139.45
2-Sep    7     4.9    15   8.22     61.68  9     123.62
4-Sep
5-Sep
AAMP
A2M
A2M
.
.
.

Matrix2:

2-Sep     4     7    1     6.8     12    8      19.4
2-Sep      2    8    15   2.2     6.8   12     13.2
4-Sep
AAMP
AAMP
ABCA5
A2M
A2M

I try to select rows with identical name from two matrix and calculate their correlation.

However, I got trouble when loading these two matrix into R as header=TRUE. 

So I use header=FLASE and these name become character in the first column.  

How do I extract the first column of matrix 1 and compare to the first column of matrix 2?

And if they are identical I compute their correlation?


SIncerely yours,
Chiahsin Liu

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