I'm not seeing the result I expect with Math.Round. return Math.Round(99.96535789, 2, MidpointRounding.ToEven); // returning 99.97 As I understand MidpointRounding.ToEven, the 5 in the thousandths position should cause the output to be 99.96. Is this not the case? I even tried this, but it returned 99.97 as well: return Math.Round(9...
In our discrete mathematics course in my university, the teacher shows his students the Ackermann function and assign the student to develop the function on paper. Beside being a benchmark for recursion optimisation, does the Ackermann function has any real uses ? ...
I'm looking for a method to generate a pseudorandom stream with a somewhat odd property - I want clumps of nearby numbers. The tricky part is, I can only keep a limited amount of state no matter how large the range is. There are algorithms that give a sequence of results with minimal state (linear congruence?) Clumping means that ...
Hi guys, according to below 3 Equations x+y+z=100; x+y-z=50; x-y-z=10; how to get the value of x,y,z with java? ============================================= String equation1="x+y+z=100;"; String equation2="x+y-z=50;"; String equation3="x-y-z=10;"; int[] SolveEquations(equation1,equation2,equation3){ // to do //how to do ? } =...
Is there a way in Java to get the result from this mathematical expression: String code = "5+4*(7-15)"; Ie, what's the best way to parse an arithmetic expression? ...
If M is prime, how to choose a and b to minimize collisions? Also in books it is written that to find the empty slot while quadratic probing in (f(k)+j^2) % M, the hash table has to be at least half empty? Can someone provide me a proof of that? ...
Is there a way to find potential numeric overflows in Java code, using the Eclipse IDE? For example... long aLong = X * Y * Z; ... where X, Y, and Z are ints and the result may overflow Integer.MAX_VALUE. (Note that, perhaps counter-intuitively, if the result in this example overflows Integer.MAX_VALUE, aLong will be assigned the erro...
How can I round down a number in Javascript? math.round() doesn't work because it rounds it to the nearest decimal. I'm not sure if there is a better way of doing it other than breaking it apart at the decimal point at keeping the first bit. There must be... ...
I have a bunch of vectors normal to window surfaces in a 3D modelling software. Projected to the XY-Plane, I would like to know in which direction they are facing, translated to the 8 compass coordinates (North, North-East, East, South-East, South, South-West, West and North-West). The vectors work like this: the X axis represents Eas...
Hay Guys, I have quick question. I have a few floats: -4.50 +6.25 -8.00 -1.75 How can I change all these to negative floats so they become: -4.50 -6.25 -8.00 -1.75 Also i need a way to do the reverse If the float is a negative, make it a positive. Thanks ...
Hello, Is there a simple way to do this if (1 < x && x < 3) { .... } I want something like this: if (1 < x < 3) { .... } I know that the code above is wrong but.... Thanks ...
I wrote a drawing function that draws various on-screen sprites. These sprites can only overlap up to a point. If they have to much overlap, they become too obscured. As a result I need to detect when these sprites are too much overlapped. Luckily, the problem is simplified in that the sprites can be treated as orthogonal rectangles. I'd...
Hi, I'm doing a division in a JSP and I'd like to round the result - how should I do this? i.e. <c:set var="expiry" value="${(expire.time - now.time) / (60 * 1000)}"/> ...how do I round the result? Thanks, ...
I'm interested in implementing an algorithm on the GPU using HLSL, but one of my main concerns is that I would like a variable level of precision. Are there techniques out there to emulate 64bit precision and higher that could be implemented on the GPU. Thanks! ...
I am writing a program in Processing that transforms complex numbers. However, I want to have a method of taking an input string and calculating the transformation using a complex variable. For example: 1/(z+1) (z^2)/(z/2) where z is a complex number. Now, I've looked at JEP and some examples, but I cannot work out if it would allow y...
This is a two part question. In a reunion of 20 people, there are 48 pairs of people that know each other. a) Justify why there is, at least, one person who knows, at most, other 4 persons. b) Suppose there is a single person who knows at most other 4 persons. How many people does that person knows exactly? I'm unsure about my answe...
from Wikipedia: fourier division. Here is a screenshot of the same: (view in full-resolution) What is the logic behind this algorithm? I know it can be used to divide very large numbers, but how exactly does it work? ...
What is wrong with my power function? pow(_,0,1). pow(X,Y,Z) :- pow(X,Y-1,X*Z). ?- pow(2,3,Z). ERROR: Out of global stack ...
I'm trying to figure out a way to algorithmically get the amplitude and phase of a function that has sinusoidal terms in the Maxima computer algebra system. This only applies to steady state (as t -> infinity and the transients decay). For example, a trivial case would be: f(t) = 1 / w * sin(w * t + theta) + exp(-a * t) + 8 In this ...
I am a student interested in developing a search engine that indexes pages from my country. I have been researching algorithms to use for sometime now and I have identified HITS and PageRank as the best out there. I have decided to go with PageRank since it is more stable than the HITS algorithm (or so I have read). I have found countle...