add F.INV.RT formula

cell/.unit-tests/FormulaTests.js

@@ -1029,6 +1029,16 @@ $( function () {
 		strictEqual( oParser.calculate().getValue().toFixed(8) - 0, 0.10930991, "F.INV(A2,A3,A4)" );
 	} );
 
+	test( "Test: \"F.INV.RT\"", function () {
+		ws.getRange2( "A2" ).setValue( "0.01" );
+		ws.getRange2( "A3" ).setValue( "6" );
+		ws.getRange2( "A4" ).setValue( "4" );
+
+		oParser = new parserFormula( "F.INV.RT(A2,A3,A4)", "A1", ws );
+		ok( oParser.parse(), "F.INV.RT(A2,A3,A4)" );
+		strictEqual( oParser.calculate().getValue().toFixed(5) - 0, 15.20686, "F.INV.RT(A2,A3,A4)" );
+	} );
+
 	test( "Test: \"GAMMA\"", function () {
 		oParser = new parserFormula( "GAMMA(2.5)", "A1", ws );
 		ok( oParser.parse(), "GAMMA(2.5)" );

cell/model/FormulaObjects/statisticalFunctions.js

@@ -62,7 +62,7 @@
 	cFormulaFunctionGroup['Statistical'] = cFormulaFunctionGroup['Statistical'] || [];
 	cFormulaFunctionGroup['Statistical'].push(cAVEDEV, cAVERAGE, cAVERAGEA, cAVERAGEIF, cAVERAGEIFS, cBETADIST, cBETA_DIST,
 		cBETA_INV, cBINOMDIST, cCHIDIST, cCHIINV, cCHISQ_DIST, cCHISQ_DIST_RT, cCHISQ_INV, cCHISQ_INV_RT, cCHITEST, cCONFIDENCE, cCORREL, cCOUNT, cCOUNTA, cCOUNTBLANK, cCOUNTIF,
-		cCOUNTIFS, cCOVAR, cCRITBINOM, cDEVSQ, cEXPONDIST, cFDIST, cF_DIST, cF_DIST_RT, cF_INV, cFINV, cFISHER, cFISHERINV, cFORECAST, cFREQUENCY,
+		cCOUNTIFS, cCOVAR, cCRITBINOM, cDEVSQ, cEXPONDIST, cFDIST, cF_DIST, cF_DIST_RT, cF_INV, cF_INV_RT, cFINV, cFISHER, cFISHERINV, cFORECAST, cFREQUENCY,
 		cFTEST, cGAMMA, cGAMMADIST, cGAMMAINV, cGAMMA_DIST, cGAMMA_INV, cGAMMALN, cGAMMALN_PRECISE, cGEOMEAN, cGROWTH, cHARMEAN, cHYPGEOMDIST, cINTERCEPT, cKURT, cLARGE,
 		cLINEST, cLOGEST, cLOGINV, cLOGNORMDIST, cMAX, cMAXA, cMEDIAN, cMIN, cMINA, cMODE, cNEGBINOMDIST, cNORMDIST,
 		cNORMINV, cNORMSDIST, cNORMSINV, cPEARSON, cPERCENTILE, cPERCENTRANK, cPERMUT, cPOISSON, cPROB, cQUARTILE,
@@ -2827,6 +2827,64 @@
 		};
 	};
 
+	/**
+	 * @constructor
+	 * @extends {AscCommonExcel.cBaseFunction}
+	 */
+	function cF_INV_RT() {
+		cBaseFunction.call(this, "F.INV.RT");
+	}
+	//clone cFINV formula
+	cF_INV_RT.prototype = Object.create(cBaseFunction.prototype);
+	cF_INV_RT.prototype.constructor = cF_INV_RT;
+	cF_INV_RT.prototype.argumentsMin = 3;
+	cF_INV_RT.prototype.argumentsMax = 3;
+	cF_INV_RT.prototype.Calculate = function (arg) {
+		var oArguments = this._prepareArguments(arg, arguments[1], true);
+		var argClone = oArguments.args;
+
+		argClone[0] = argClone[0].tocNumber();
+		argClone[1] = argClone[1].tocNumber();
+		argClone[2] = argClone[2].tocNumber();
+
+		var argError;
+		if (argError = this._checkErrorArg(argClone)) {
+			return this.value = argError;
+		}
+
+		var calcFDist = function(argArray){
+			var fP = argArray[0];
+			var fF1 = parseInt(argArray[1]);
+			var fF2 = parseInt(argArray[2]);
+
+			if (fP <= 0 || fF1 < 1 || fF2 < 1 || fF1 >= 1.0E10 || fF2 >= 1.0E10 || fP > 1){
+				return new cError(cErrorType.not_numeric);
+			}
+
+			var aFunc = new FDISTFUNCTION(fP, fF1, fF2);
+			var oVal = iterateInverse( aFunc, fF1*0.5, fF1 );
+			var bConvError = oVal.bError;
+
+			if (bConvError){
+				return new cError(cErrorType.not_numeric);
+			}
+
+			var res = oVal.val;
+			return null !== res && !isNaN(res) ? new cNumber(res) : new cError(cErrorType.wrong_value_type);
+		};
+
+		if (argClone[1].getValue() < 1 ){
+			return this.value = new cError(cErrorType.not_numeric);
+		}
+
+		return this.value = this._findArrayInNumberArguments(oArguments, calcFDist);
+	};
+	cF_INV_RT.prototype.getInfo = function () {
+		return {
+			name: this.name, args: "(probability, deg_freedom1, deg_freedom2)"
+		};
+	};
+
 	/**
 	 * @constructor
 	 * @extends {AscCommonExcel.cBaseFunction}