The Little Guy Posted November 8, 2012 Share Posted November 8, 2012 I have been developing an android app, and I am stuck on some math (One thing I am not too good with). So, I have a slide bar that you can drag left to right. By Default all the way left is 0 and all the way right is 100. I am trying to find a formula that will make all the way left will simulate -100 and all the way right will simulate +100 and 0 would be dead center. For those not familiar with android programming, the event passes a position value to the event listener, which is a number between 0 and 100. I would like to take that number and convert it from -100 to +100. Thanks for the help! Link to comment https://forums.phpfreaks.com/topic/270459-some-simple-math/ Share on other sites More sharing options...
The Little Guy Posted November 8, 2012 Author Share Posted November 8, 2012 Got the formula! f(x) = x*2 - 100 Link to comment https://forums.phpfreaks.com/topic/270459-some-simple-math/#findComment-1391086 Share on other sites More sharing options...
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