Java Implementation Excel Formula topic (vii)--statistical function

Statistical functions are mainly implemented by more complex statistical functions such as COUNTIF, SUMIF, frequency, also, directly on the code

/** * Project Name: * File Description: * Main Features: File Description: Excel function Type: statistical function * Simple functions such as sum,average and so on are not implemented * Version number: 1.0 * Producer: Liu Morning * created: 2013-12-3 **/p Ackage Excel;import Games. Mathtools;import Javax.script.scriptengine;import Javax.script.scriptenginemanager;import javax.script.scriptexception;/** * @author LCX * */public class Countfunctions {/** * Statistics satisfies the number of conditions * @param range * @param cr Iteria * @return */public static int sumif (int[][] range,string criteria) {Scriptenginemanager man=new Scriptenginemanager (); ScriptEngine Engine=man.getenginebyname ("JavaScript"), int sum=0;for (int i=0;i<range.length;i++) for (int j=0;j <range[0].length;j++) {try {Boolean b= (Boolean) Engine.eval (Range[i][j]+criteria), if (b) sum+=range[i][j];} catch ( Scriptexception e) {//TODO auto-generated catch Blocke.printstacktrace ();}} return sum;} /** * Statistics meet the number of conditions * @param range * @param criteria * @return */public static int countif (int[][] range,string criteria) {SCR Iptenginemanager man=new Scriptenginemanager (); ScriptEngine Engine=man.getengineByName ("javascript"); int count=0;for (int i=0;i<range.length;i++) for (int j=0;j<range[0].length;j++) {try { Boolean b= (Boolean) Engine.eval (Range[i][j]+criteria), if (b) count++; catch (Scriptexception e) {//TODO auto-generated catch Blocke.printstacktrace ();}} return count;} public static void sort () {System.out.println ("Sort array and Tags");} /** * for simplified processing, here you need to ensure that the input is an array of ascending order * @param array * @param tags * @return */public static int[] Frequency (int [] array,int[] t AGS) {sort ();//Sort, where it is not implemented if (array==null| | tags==null| | array.length==0| | array.length==0) throw new IllegalArgumentException ("Array is empty"); int[] res=new int[tags.length+1];int count=0;for (int i=0; i<array.length;i++) {if (count>=tags.length) break;if (Array[i]<=tags[count]) Res[count]+=1;else {I--;count ++;}} The remaining int sum=0;for (int i=0;i<res.length-1;i++) Sum+=res[i];res[res.length-1]=array.length-sum;return res;} public static void Main (string[] args) {/******************* test array related *****************************/int [][]a={{1,2},{ 3,4},{5,6}};//cOuntif (A, "<=2");//system.out.println (rank (3,a,true)); System.out.println (SUMIF (A, "<=2")); int[] b={15,25,35,45,55,65,75,85,95}; Mathtools.printarray (Frequency (b,new int[]{10,90}));}}

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Java Implementation Excel Formula topic (vii)--statistical function