What I need is: plots creation, stuff for interpolation, stuff for counting such things as and where L(x) is an interpolation built from some data (points) generated from original known function f(x). meaning we know original function. we have a range (-a, a) - known. We need library to help us calculate data points in range. we ...
I'm looking for something that I guess is rather sophisticated and might not exist publicly, but hopefully it does. I basically have a database with lots of items which all have values (y) that correspond to other values (x). Eg. one of these items might look like: x | 1 | 2 | 3 | 4 | 5 y | 12 | 14 | 16 | 8 | 6 This is just a a rando...
I’m using this equation to convert steps to estimated calories lost. I now need to do the opposite and convert total calories to estimated steps. This is the equation I’m using for steps to calories: +(CGFloat) totalCalories:(NSUInteger)TotalStepsTaken weight:(CGFloat)PersonsWeight{ CGFloat TotalMinutesElapsed = (float)TotalStepsT...
I'm on the FIRST robotics team at my high school, and we are working on developing a kiwi drive robot, where there are three omni wheels mounted in a equilateral triangle configuration, like this: The problem is programming the robot to drive the motors such that that the robot moves in the direction of a given joystick input. For exa...
I have the following function in my code: int numberOverflow(int bit_count, int num, int twos) { int min, max; if (twos) { min = (int) -pow(2, bit_count - 1); \\ line 145 max = (int) pow(2, bit_count - 1) - 1; } else { min = 0; max = (int) pow(2, bit_count) - 1; \\ line 149 ...
Hi All, How to add two numbers of any length in java? Say for example, in java long size is 64 bit. So the maximum range is -9223372036854775808 to 9223372036854775807. Am i right? So if we want to add a number which is greater than this like below, i got a error " Integer Number too large" long a = 9223372036854775807L; lon...
Under the user generated posts on my site, I have an Amazon-like rating system: Was this review helpful to you: Yes | No If there are votes, I display the results above that line like so: 5 of 8 people found this reply helpful. I would like to sort the posts based upon these rankings. If you were ranking from most helpful to ...
I have a convex polygon P1 of N points. This polygon could be any shape or proportion (as long as it is still convex). I need to compute another polygon P2 using the original polygons geometry, but "expanded" by a given number of units. What might the algorithm be for expanding a convex polygon? ...
Does anyone know a good one? I'm looking for multiplication of matrices, transpose, invert, converting from 4x4 to top left corner 3x3 etc. ...
[This was initially on matrices, but I guess it applies to any variable generically] Say we have Var1 * Var2 * Var3 * Var4. One of them sporadically changes, which one of them is random. Is it possible to minimize multiplications? If I do In case Var1 changes: newVar1 * savedVar2Var3Var4 I noticed that then I need to recalculate ...
Everyone, here is a link to a small python app: http://en.wikipedia.org/wiki/File:Beta-skeleton.svg I think I've correctly converted it. (Source at bottom of post) But, the Math.Acos always returns NaN. Is there a difference between the python version of acos and Math.Acos? private Random rnd = new Random(); private double ...
Given time-series data, I want to find the best fitting logarithmic curve. What are good libraries for doing this in either Python or SQL? Edit: Specifically, what I'm looking for is a library that can fit data resembling a sigmoid function, with upper and lower horizontal asymptotes. ...
Hi, I have accelerometer values for the 3 axis(usually when there is only gravity contains data between -1.0 and 1.0 ): float Rx; float Ry; float Rz; I make soma calculations, then I get the angles for each axis. float R = sqrt(pow(Rx,2)+pow(Ry,2)+pow(Rz,2)); float Arx = acos(Rx/R)*180/M_PI; float Ary = acos(Ry/R)*180/M...
Hi all! I would like to draw a CubicCurve2D but I have just the coordinates where my curve pass. How can I get or calculate the "coordinate of the control points "? ...
I'm playing through project Euler in my spare time, and it's come to the point where I need to do some refactoring. I've implemented Miller-Rabin, as well as a few sieves. I've heard before that sieves are actually faster for small-ish numbers, as in under a few million. Does anybody have any information on this? Google wasn't very helpf...
I have a set of points. This set of points do define a (non convex) polygon but its not ordered. Since it's not ordered I cannot just draw from point to point to draw its border. How can I sort it in a way I can walk through this point list and draw a polygon? My first idea was to use a convex hull but my polygons are, most of the tim...
I'm not the best in Maths, but for what I am doing now I need to calculate the angle of the vector which is shown as arrow in the picture below: I have a point A and a point B in a 2D plane. I need to calculate the following: The angle in which the arrow must be rotated in order to point to B ...
I have a bit of javascript that dynamically multiplies what users are typing in a text field (by the base var), and displays it in a Now I'm just trying to figure out how to get the decimal places of the result to float to 2 places, i.e. 10.00 instead of 10 I found the toFixed function, but can't seem to use it properly... I'd appreciat...
I'm using HTML 5 to render elliptic pie charts per section; using a path that starts from the centre, out to the edge, across it's arc and back to the centre which is then filled. If they were perfectly circular I could use the arc or arcTo path functions, but because they're elliptical the outer curves will always have a variable radiu...
I had once known of a way to use logarithms to move from one leaf of a tree to the next "in-order" leaf of a tree. I think it involved taking a position value (rank?) of the "current" leaf and using it as a seed for a fresh traversal from the root down to the new target leaf - all the way using a log function test to determine whether t...