Hi guys,

I have a very simple question.
I'm trying to make multiple columns to a single column.

For example,

*ttx1* is a 46*72 matrix.

so, I tried this.

*d1=ttx1[,1]
d2=ttx1[,2]
...
d72=ttx1[,72]*

now, d1, d2, ...,d72 become a 46*1 matrix.
And then.. I tried..

*dd=rbind(d1, d2, ..., d72)*

I thought *dd* should be 3312*1 matrix; but it becomes 72*46.
I really wanted to make it a  single column (3312*1).

Do you know what is wrong in this code? Or, do you have a better idea in
making multiple columns to a single column?

Thank you so much.

-Hyo

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