ndvi calculation

Overview In the field of application software development, the application of expression calculation has been widely used. For example, in report development, often provide user with formula input function, so as to achieve more flexible report summary; In workflow application software, the dynamic configuration of logic conditions is often used to provide more flexible process configuration. Also, in some UI development, you need to dynamically cont

WPS2013 Table How to Do data consolidation calculation 1. Start wps form, input data source, we want to calculate the total sales of 7 August, the next click the other cells, then click the data-consolidation. 2, select the function, we choose Sum. 3, select the reference location, the July data selected, Add. 4, repeat the above steps, the August data added, and then check the left column. 5, after the determination

The so-called "astronomical algorithm", is to use the classical law of mechanics to deduce the orbit of the planets, the exact calculation of the position of the planet at any time, so as to obtain the time when an astronomical phenomenon occurs, such as the Sun and Moon, the celestial phenomenon is the Huangching (depending on the Yellow Sutra) to 0 of the moment. A set of theories capable of calculating the position of a planet at any given time is

Ali Entertainment Treasure is how much: The first stage in the entertainment treasure platform on the line is a "state wah Huarui 1th Life Insurance" of the investment-linked insurance products, product providers for the country's Chinese longevity. Expected annual income of 7%, not guaranteed not to guarantee; 1 years to receive or refund 3% of the handling fee, 1 years after the automatic full collection; In order to prevent the customer funds risk, this time to take "single customer premium

think, so I still look, deal with him.I heard that when bored to learn, because of learning, you will find there are more interesting things to interrupt you. 0-0 did not say study 0-0;int [] a B; what does this mean? Equivalent to an int a[],int b[] means declaring two variablesint [] a,b[]; What is this? 0-0 equivalent to int a[], int b[][]; This is a little bit more.Of course Java differs from C and C + +, and Java does not allow the number of elements in the array to be specified within the

The most recent data analysis requires a discrete value.My personal understanding is that the average of the difference between each number and the average of all numbersThe implementation method is as follows:public static double docal (double [] datas) {//mean double Pingjun = 0;//sum/number of double total = 0;for (int i =0;iThe Java implementation of discrete value calculation method

Method one: Using the Escape functioncollapse Expand JavaScript code copy content to clipboard function Cnlength (STR) { var escstr = Escape (STR); var Numi = 0; var escstrlen = escstr.length; For (i = 0; i if (Escstr.charat (i) = = '% ') if (Escstr.charat (++i) = = ' u ') numi++; return str.length + Numi; } Method Two: Use regular match Chinese, replace each Chinese with two comma to calculate the lengthcollapse Expand JavaScript code copy content to clipboard

Method 1Import= datetime.datetime.now ()#long running= Datetime.datetime.now ()print (endtime-starttime). secondsMethod 2Start == time.time ()print End-startMethod 3Start == time.clock ()print End-startBoth Method 1 and Method 2 contain the time that other programs use the CPU, which is the time the program starts to run to the end of the program.Method 3 calculates only the CPU time that the program is runningPython Calculation program run time

Men's Men =NewMen (); Men.setname ("UU"); Men.setage ("56"); Men Men1=NewMen (); Men1.setname ("KK"); Men1.setage ("23"); Men Men2=NewMen (); Men2.setname ("KK"); Men2.setage (""); ListNewArraylist(); List.add (men); List.add (MEN1); List.add (MEN2); //General Wording intSum =0; for(men men3:list) {if(Men3.getname (). Equals ("KK") ) {sum= Sum + integer.parseint (Men3.getage (). IsEmpty ()? " 0 ": Men3.getage ()); } } //JAVA8 new Features

Static voidMain (string[] args) {7Scanner cin =NewScanner (system.in);8BigInteger A =Cin.nextbiginteger ();9BigInteger BB =A;TenBigInteger C = biginteger.valueof (10); One BigInteger D; ABigInteger ans =A.add (BB); -BigInteger B =ans; - BooleanBook =true; the int[] Book0 =New int[10]; - while(!a.equals (biginteger.valueof (0))) { - //System.out.println (a.equals (0)); -D =A.mod (c); +A =A.divide (c); -Book0[d.intvalue ()] = 1; + } A while(!b.equals (Big

! = ' # ') {sb.append (CH); CH=Stack.pop (); } stack.clear (); returnsb.tostring (); } PublicInteger Calc (String expression) {expression=transfer (expression); for(inti = 0; I ) { Charc =Expression.charat (i); Switch(c) { Case+: Case‘-‘: Case‘*‘: Case‘/‘: Dooperate (c); Break; default: Pushoperand (NewInteger (c + "")); Break; } } returnStack.pop (); } /** * @paramargs*/ Public Static voidMain (string[

32-bit and 64-bit, and the installation is consistent with the Python-bit system, 4. About whether you need to copy the module used to the. py Directory online Someone said need to put together, I tried not to put together, still can 11. String processing (1) Intercept section data = data[:-4] #将最后4个干掉 data = Data[2:4] #获取字符串中的第3和第4个 (2) Replace data = Data.replace (' What needs to be replaced ', ' replace the contents of the former ') [Tip]:1. Detect if the module is installed successfully: Af

=340282346638528860000000000000000000000.000000 This is the maximum value of float4.float Positive Minimum value float.h we see that the minimum value of float is 1.175494351e-38f[CPP]View PlainCopy #define FLT_MIN 1.175494351e-38f/* MIN Positive value */ By understanding the structure of the float type we know how to get the positive minimum value, we just need to get the exponent position to the minimum and 0000 0000 The exponent is 0-127=-127, then the last position of the trail

The main topic: given some alloys, choose the least alloy, so that these alloys can be synthesized according to the requirements of the alloyFirst of all, the idea of this problem is particularly fascinating to see how this problem can be thought of computational geometry and computational geometry and how to hang with Floyd.First of all because of a+b+c=1 so we just got a and B c=1-a-b so C can not read into theAnd then we abstracted each ingredient into a single point, and we know that the two

System.nanotime () method , this is more powerful, directly is the nanosecond-level timing method, than the above method of the accuracy of the 10^6 times, so for the time accuracy requirements are more comfortable with this method.UsageSuppose we need to test the time of the main () program:Method 1:Long start = calendar.getinstance (). Gettimeinmillis ();//start time, Unit is millisecondsMain ();//program runLong end = calendar.getinstance (). Gettimeinmillis ();//End timeDouble spenttime = (

Calculation method of ID card check code 1, the previous ID number 17 digits multiplied by different coefficients. The number of the I-bit corresponds to [2^ (18-i)]mod11. The coefficients from first to 17th are: 7 9 10 5 8 4 2 1 6 3 7 9 10 5-8 4 2; 2, the 17-digit numbers and coefficients multiplied by the result of the addition; 3, with added out and divided by 11, see the remainder is how much? ； 4. The surplus can only have 0 1 2 3 4 5 6 7 8 9

PHP Implementation: Copy Code code as follows: /** * Calculation of arithmetic expressions */ Error_reporting (E_all); $exp = ' (1+2* (3+5)/4) * (3+ (5-4) *2) '; $arr _exp = Array (); for ($i =0; $i $arr _exp[] = $exp [$i]; } $result = Calcexp (Array_reverse ($arr _exp)); Echo $exp. '=' . $result; function Calcexp ($exp) { $arr _n = Array (); $arr _op = Array (); while (($s = Array_pop ($exp))!= ') { if ($s = = ' (') { $tem

Copy Code code as follows: /** * PHP Age Calculation function * * parameter supports array parameters and standard Mysql date type arguments * Params sample * -------------------------------------------------- $BIRTHARR = Array ( ' Year ' => ' 2000 ', ' Month ' => ' 11 ', ' Day ' => ' 3 ' ); $birthStr = ' 2000-11-03 '; * -------------------------------------------------- * ); * @author It Tumbler * @copyright (c) 2011,2012 Just use

C # time interval calculations illustrate: To implement C # time interval calculations between two times: TimeSpan ts1 = new TimeSpan (DateTime.Now.Ticks); Gets the tick number of the current time//Your code or other operation TimeSpan ts2 = new TimeSpan (DateTime.Now.Ticks); TimeSpan ts = ts2. Subtract (TS1). Duration (); The absolute value of the time difference String spantime = ts. Hours.tostring () + "hour" + TS. Minutes.tostring () + "min" + TS. Seconds.tostring () + "seconds"; In X-hour x

/Accurate calculation of addition and subtraction. such as 0.1+0.2=0.3 or 0.1-0.2=-0.1 Copy Code code as follows: function Addfn (dataone,datatwo) { var dataoneint=dataone.tostring (). Split (".") [0]; var dataonefloat= ""; var datatwoint=datatwo.tostring (). Split (".") [0]; var datatwofloat= ""; var lengthone=0; var lengthtwo=0; var maxlength=0; if (Dataone.tostring (). Split ("."). length==2) { Dataonefloat=dataone.tostrin