equation

Scenario: An record was entered into the database. I am trying to figure out the following equations: How to get the number of hours since the record was added. How to get how many hours are left until midnight since the record was added. Given these times: Date / Time: 2012-08-22 20:11:20 Time Stamp: 1345684280 Midnight Tonight: 2012-08-23 00:00:00 Midnight Time Stamp: 1345698000 I feel like I'm on the right track. Just need some proper math to do the calculations? I am horrible at math. Any help or guidance would be appreciated. I'm not looking for someone to COMPLETE THIS FOR ME. Just

I'm currently developing an application which uses the iOS enabled device camera to recognise equations from the photo and then match these up to the correct equation in a library or database - basically an equation scanner. For example you could scan an Image of the Uncertainty Principle or Schrodinger Equation and the iOS device would be able to inform the user it's name and certain feedback. I was wondering how to implement this using Xcode, I was thinking of using an open-source framework such as Tesseract OCR or OpenCV but I'm not sure how to apply these to equations. Any help would be

I am trying to plot a two variable equation to a Cartesian plane. Here is my problem, on the code below if I comment out one for loop and let another run, the plot of the graph (the negative or positive sides of x) is correct, but if I run both for loops they seem to alter each other and the graph comes out wrong. I've tried every combination of for loops, looping frontward, backward, nothing seems to solve it. I commented out the where these loops are at the end of the class "public class DrawingComponent extends JComponent" where it says "// This two loops work fine if each one is run

I have to split the screen equally (as possible) given a dynamic number of items. So i need to find the number of columns and rows based on the screen size/ratio. Each item size is not important since i will calculate them in % based in the items per col and row. If i have 5 items, then (depending on the screen ratio) i will probably have 3 columns in the 1st row and 2 columns in the 2nd row. That's ok. First you have to decide what you mean with "divide the screen equally". It probably means that there is a preferred x-to-y ratio for each item. You could use the following algorithm that

For simplicity say we have a sample set of possible scores {0, 1, 2}. Is there a way to calculate a mean based on the number of scores without getting into hairy lookup tables etc for a 95% confidence interval calculation? dreeves posted a solution to this here: How can I calculate a fair overall game score based on a variable number of matches? Now say we have 2 scenarios ... Scenario A) 2 votes of value 2 result in SE=0 resulting in the mean to be 2 Scenario B) 10000 votes of value 2 result in SE=0 resulting in the mean to be 2 I wanted Scenario A to be some value less than 2 because of the

I need to solve a few mathematical equations in my application. Here's a typical example of such an equation: a + b * c - d / e = a Additional rules: b % 10 = 0 b >= 0 b <= 100 Each number must be integer ... I would like to get the possible solution sets for a, b, c, d and e. Are there any libraries out there , either open source or commercial, which I can use to solve such an equation ? If yes, what kind of result do they provide? Solving linear systems can generally be solved using linear programming. I'd recommend taking a look at Boost uBLAS for starters - it has a simple triangular