Drip line, single row for yard border trees/bushes

Hello, I would like to get a dripline on the Flex Daily. It is a single row of 1GPH emitters spaced at 1’ apart. Using this forum I found http://irrigation.wsu.edu/Content/Calculators/Drip/Drip-Line-Rate.php, but the formula doesn’t seem to work for a single row. I also looked at formula in text lower on the page and am not understanding the 231, nor ‘Emity’ ( think it is spacing of emmiters). I am guessing my PR should be .95, does that sound correct?