eppraisal accuracy

, isnumeric, isfloat, isinteger.; ========================================================== = > Help VPAVPA variable precision arithmetic.R = VPA (s) numerically evaluates each element of the double MatrixS Using Variable Precision Floating Point Arithmetic with D decimalDigit accuracy, where D is the current setting of digits.The resulting R is a sym.VPA (S, d) uses D digits, instead of the current setting of digits.D is an integer or the sym repres

This question is directly simulated. However, I hung the Qaq on the last two points. The only thing you should pay attention to is accuracy... If it is used to convert the value behind double to an integer, we forget to use Longlong... Sad #include 　　 Background Who is the most virtual in the attached IDC? Class 2 and Class 1 ***! It feels good, right? Description Today, the zombie czy drove an excavator to school (......). But he found that hi

I will not talk much about the questions. Here, DP [I] [0] indicates the probability that I will be left in the second box after the first box is obtained. The expected result is DP [I] [0] * I. DP [I] [1] indicates the probability that I will be left in the first box after the second box is obtained. DP [I] [0] = P ^ (n + 1) * (1-p) ^ (n-I) * C (2 * n-I, n-I) = P ^ (n + 1) * (1-p) ^ (n-I) * (2 * n-I )! /(N-I )! /N! DP [I + 1] [0] = P ^ (n + 1) * (1-p) ^ (n-i-1) * C (2 * n-i-1, n-i-1) = P ^ (n

D can also say:D = K1/(1 ^) + K2/(^ 2) + K3/(+ ^3) + ... + kn/(ten ^ n)Extended to binary, the representation of decimal fraction is:D = B1/(2 ^ 1) + b2/(2 ^ 2) + B3/(2 ^ 3) + ... + bn/(2 ^ n)Now the question is how to obtain B1, B2, B3,......,bn. The algorithm is more complex to describe, or to speak with numbers. To declare, 1/(2 ^ n) This number is special, which I call a bit-order value.For example 0.456, 1th bit, 0.456 is less than the bit order value 0.5 is 0, 2nd bit, 0.456 is greater th

Test instructions: For a given 12 numbers, the average is calculated.Analysis: This problem is the precision control problems, if the control accuracy, the best way is to use the integral type.The code is as follows:#include HDU 4493 Tutor (Control accuracy)

Transmission DoorThere are 2 piles of stones. A B Two people take turns, a take first. Each time you can take any or 2 of the same number of stones from a heap, but not to be taken. The man who got the last 1 stones won. Suppose a B is very clever, there is no mistake in the process of taking the stone. Give the number of 2 stones and ask who will win the game at the end.For example, 2 stones were 3 and 5. So no matter a how to take, B has a corresponding method to get the last 1.InputLine 1th:

convenient to call. Number.prototype.add =function(ARG) {returnAccadd ( This, ARG); } /** subtraction function, used to get accurate subtraction results * Description: JavaScript subtraction results will be error, when the two floating-point subtraction will be more obvious. This function returns a more accurate subtraction result. * Return value: ARG1-ARG2 values, arg1 and arg2 may be integers, floating-point numbers, null, empty strings, other strings * @param arg1 * @p

Recall (recall rate); Precision (accuracy rate); F1-meature (Comprehensive evaluation index); These parameters are often used in information retrieval (such as search engines), natural language processing, and detection classifications.Precision: The percentage of information that is detected that is correct or relevant ( that is, what you want)(Number of positive samples predicted as a proportion of the total sample);Recall: The proportion of all cor

different.InputOne line with a positive integer:the number of test cases. Then to each test case: One line with a integers N and F with 1≤n, f≤10 000:the number of pies and the number of friends. One line with N integers ri with 1≤ri≤10 000:the radii of the Pies. OutputFor each test case, output one line with the largest possible volume V such that me and my friends can all get a pie piece of Size v. The answer should is given as a floating point number with an absolute error

Improving the clustering accuracy of Kmeans by simulated annealingKmeans algorithm is an unsupervised clustering algorithm, because the principle is simple and widely used in the industry, generally encountered in practice clustering problems will tend to use Kmeans to try a look at the results. In my work, I have had many practices in Kmeans, such as user behavior Clustering (mapreduce version), Image Clustering (MPI version), etc. In practice, howev

In general, when judging the time, the use of a datetime type is sufficient. But there are situations, such as the followingDECLARE @DT1 DATETIMEDECLARE @DT2 DATETIME SELECT @DT1 = '2014-12-22 15:45:00:128', @DT2 = '2014-12-22 15:45:00:126' IF @DT1 > @DT2 SELECT GETDATE()Find out the result is empty ~ eh??And then we find that it's a matter of accuracy. Check it out. Document discovery is indeed, then (thanks to the Almighty online documentation)

/DetectEncoding.aspx) by calling the IE interface to guess the character set, but I tried, the accuracy of this interface is not high, the chance of success is much lower than universalchardet. Ps2. nchardet is widely circulated on the Internet. It is implemented based on C # Of chardet in earlier versions of Mozilla. The accuracy is also relatively low, which is similar to the interface success rate of I

SlopeOne is an Item-Based recommendation algorithm proposed by nbsp; DanielLemire nbsp; professor at nbsp; 2005 nbsp. Nbsp; The SlopeOne algorithm tries to meet the following five goals at the same time: easy implementation and maintenance: common engineers can easily explain all the aggregated data, and the algorithm is easy to implement and test. What is the Slope One algorithm? Daniel Lemire? Professor? 2005? .? The Slope One algorithm tries to meet these five goals at the same time:

The accuracy of floating-point numbers in JS can generally reach 16 digits, so some people use parsefloat (x.tofixed (12)) to improve the precision of the floating-point arithmetic in JS.It is proved that this method is basically correct when the number of digits is small, but it is not valid for large or small operation results, such as 1222.31*2344, the direct operation result is 2865094.6399999997, parsefloat (1222.31* 2344). ToFixed (12)) is still

Recently encountered a strange problem, the mall through the payment of orders often less than a penny, after the troubleshooting is a problem caused by the accuracy of PHP floating point arithmeticBy the PHP floating-point arithmetic precision caused by, bird Brother's Bolg have detailed description. Http://www.laruence.com/2013/03/26/2884.html,Decimal in binary notation, 0.58 for binary, is an infinitely long valueThe binary representation of 0.58 i

High Accuracy-the number of gold segments (the first 100 digits) and the number of gold segments (the first 100 digits)Description: The golden split number 0. 61823... is an irrational number. This constant is very important and may occur in many engineering problems. Sometimes this number must be accurate. For some precision engineering, the accuracy of these constants is very important. Maybe you have he

High precision (accuracy) method, accuracy First pass subtraction! # Include The following is the ++ method! #include 　　 　　

Even though we use mobile phones a lot now, landlines are still used by many families and companies.Empty number detection platform, the easy-to-understand description is the need to call the fixed number, mobile phone number, PHS and other pre-Test call testing, according to its feedback instructions to automatically determine whether these numbers can be dialed or not dialed, leaving a valid number, filter empty number, which can improve the efficiency of the external call staff , at the time

I used to do a community e-commerce application, found a sinkhole ....... ..... Make me cry. Below listen to my pit road, e-commerce must deal with ￥, calculate the indispensable. Because I am too simple to think that float double can directly participate in subtraction feel this code foolproof not to think so many direct float*int. Before the simple test is not a problem, the project on the line after their own accidental discovery (do not know what the company testing), when the choice of more

How serious this problem is, the foreign net friend that has the right to register a domain name directly to explain this question ... 0.30000000000000004.com//js addition calculation//Call: Accadd (ARG1,ARG2)//return value: Exact result of Arg1 plus arg2functionAccadd (arg1,arg2) {varr1,r2,m; Try{r1=arg1.tostring (). Split (".") [1].length}Catch(e) {r1=0} Try{r2=arg2.tostring (). Split (".") [1].length}Catch(e) {r2=0} m=math.pow (10, Math.max (R1,R2))return((arg1*m+arg2*m)/m). ToFixed (2);}