Formula for row vs column

I reviewed this tip to automatically update graphs....

Go to Insert | Name| Define.
Enter Date in the Names In Workbook text box.
Enter the following formula in the Refers to text box:

=OFFSET(Sheet1!$A$2,0,0,COUNTA(Sheet1!$A:$A)-1)Click Add.
Enter Temperature in the Names In Workbook text box.
Enter the following formula in the Refers To text box:

=OFFSET(Sheet1!$B$2,0,0,COUNTA(Sheet1!$B:$B)-1)Click Add and then OK.
Click on the chart, and then on the data series.
Change the formula in the formula bar to the following:

=SERIES(,Sheet1!Date,Sheet1!Temperature,1)The chart will update automatically each day with a new temperature. Be sure you don't use Columns A and B for any other data; otherwise, COUNTA will return an incorrect value.
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How do you change these formulas to do it for a particular row instead of a column?