double

Rounding double values in C#

I want a rounding method on double values in C#. It needs to be able to round a double value to any rounding precision value. My code on hand looks like: public static double RoundI(double number, double roundingInterval) { if (roundingInterval == 0.0) { return; } double intv = Math.Abs(roundingInterval); d...

How to sort a List<T> by double value?

This sound simple but it not that much. I want to order a List based on one of the properties of T, which is double type. ...

Error when assigning value to a Double in Java Servlet

Hi, I was debugging an error I was getting with a java servlet. I was assigning a value to a Double in the class, however occasionally when I ran the servlet I was getting a random number as the value. Not sure if this has to do with using the wrapper versus primitive? Here is a snippet of code: public class MyClass extends Http...

Will Decimal or Double work better for translations that need to be accurate up to .00001?

I'm an inspector at a machine shop. I have an html report generated by another inspector that has some problems I need to fix. This isn't the first time: I need something better than PowerShell and RegEx. (Fear not internet warriors, I know I shouldn't use RegEx for html. I'm using HtmlAgilityPack now.) I'm aware there are a lot of simi...

double conversion value error in c#

double deg=90; double two= 2* System.Math.PI; double rad=(two)*(deg/360); the original value when calculating manually ,rad is 1.5707963267948966 but rad shows when debugging is 1.5707963705062866 what is reason for this and how do i fix it.but correct answer is manual calculation answer only...... Here are the numbers for easier co...

C# - problem with very small numbers - not enough digits in double datatype

Hi I'm writing a program in C# which suppose to calculate very small numbers. However, all my calculations are getting NaN value because they are too small for the 'double' datatype. Is there an option in C# to deal with such situations? Thanks, Eden. ...

PHP check if variable is a whole number

I have this PHP code: $entityElementCount = (-($highScore-$totalKeywordCount))/0.29; What i want to know is, how to check whether $entityElementCount is a whole number (2, 6, ...) or partial (2.33, 6.2, ...). Thank you! ...

Double to int conversion behind the scene?

I am just curious to know what happens behind the scene to convert a double to int, say int(5666.1) ? Is that going to be more expensive than a static_cast of a child class to parent? Since the representation of the int and double are fundamentally different is there going to be temporaries created during the process and expensive too. ...

double scientific notation to decimal notation in java

Hi I am trying to convert scientific double to decimal double in java. I am sending a value from server (coded on C++) which is running on X86 (little endian) machine and I was using htonl, ntohl methods for convertion before sending data to client (coded on java). But now, I have to sent this value with no conversion like LE to BE. The...

C#: Weird outcome when subtracting doubles.

Possible Duplicate: Why is floating point arithmetic in C# imprecise? I have been dealing with some numbers and C#, and the following line of code results in a different number than one would expect: double num = (3600.2 - 3600.0); I expected num to be 0.2, however, it turned out to be 0.1999999999998181. Is there any reas...

C# float infinite loop

The following code in C# (.Net 3.5 SP1) is an infinite loop on my machine: for (float i = 0; i < float.MaxValue; i++) ; It reached the number 16777216.0 and 16777216.0 + 1 is evaluates to 16777216.0. Yet at this point: i + 1 != i. This is some craziness. I realize there is some inaccuracy in how floating point numbers are stored. ...

convert double value to binary value

How can i convert double value to binary value. i have some value like this below 125252525235558554452221545332224587265 i want to convert this to binary format..so i am keeping it in double and then trying to convert to binary (1 & 0's).. i am using C#.net ...

How do I read in a double in Java?

I am trying to get a decimal input from the keyboard, and it is just not working. First I tried double d = Integer.parseInt(JOptionPane.showInputDialog( "Please enter a number between 0 and 1:")); and that obviously didn't work very well. I am used to just parsing int's as they come in from the ke...

how to print a Double without commas

When using toString(), Double adds commas (5143 is printed as 5,143). How to disable the commas? ...

How do i format the output in C?

Hello I have this code for a school assignment, but i can't manage to format it. When i run the program i keep getting 1.27768e-307. lp->price is a double with the value of 1000000.0000000000 printf("Price of flat: %g\n", lp->price); Any ideas? The other double values gets formatted correctly, just not price. ...

opencv: execution halting at double pointer arithmetic for image pixel access

A single channel image is my input. ( defalut IPL_DEPTH_8U) I am multiplying each pixel of my input image with scalar floating point numbers like 2.8085 (as a part of my algorithm). So this needs me to increase the depth and change the image type to IPL_DEPTH_64F But whenever I am trying to change my image datatype to IPL_DEPTH_64F an...

Floats, doubles and half floats

I was wondering about how bits are organized on floats (4 bytes), double (8 bytes) and half floats (2 bytes, used on OpenGL implementation). Further, how I could convert from one to another? ...

Error using Double type in Java...this has to be so simple, I'm almost ashamed I am asking it here

Okay. I have been bashing my head against the wall for like 2 hours now trying to figure out why in the world double answer = 364/365; is telling me that answer is 0. Or any other combination of double for that matter, its just truncating the decimal and I just don't know why. Please help!!! ...

C printf using %d and %f

I was working on this program and I noticed that using %f for a double and %d for a float gives me something completely different. Anybody knows why this happens? int main () { float a = 1F; double b = 1; printf("float =%d\ndouble= %f", a, b); } This is the output float = -1610612736 double = 1903598371927661359216126713647498937...

asp.net double buffering ?

Hi, How can I use double buffering in asp.net C#? I want smthng like that : I dont want full page refresh when I click a button in a web page.. I think it can be solved with double buffering. When a button clicked for redirect a content page (button-in master page), current page will not go until the redirected page completely load in ...