diff options
author | 2008-11-13 09:49:11 +0000 | |
---|---|---|
committer | 2008-11-13 09:49:11 +0000 | |
commit | e44a7e37b6c7b5961adaffc62b9042b8d442938e (patch) | |
tree | 95b67c356e93163467db2451f2b8cce84ed5d582 /includes/js/dojox/math/_base.js | |
parent | a62b9742ee5e28bcec6872d88f50f25b820914f6 (diff) | |
download | scuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.tar.gz scuttle-e44a7e37b6c7b5961adaffc62b9042b8d442938e.zip |
New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
Diffstat (limited to 'includes/js/dojox/math/_base.js')
-rw-r--r-- | includes/js/dojox/math/_base.js | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/includes/js/dojox/math/_base.js b/includes/js/dojox/math/_base.js new file mode 100644 index 0000000..ef2243c --- /dev/null +++ b/includes/js/dojox/math/_base.js @@ -0,0 +1,122 @@ +if(!dojo._hasResource["dojox.math._base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code. +dojo._hasResource["dojox.math._base"] = true; +dojo.provide("dojox.math._base"); + +dojo.mixin(dojox.math, { + degreesToRadians: function(/* Number */n){ + // summary + // Convert the passed number to radians. + return (n*Math.PI)/180; // Number + }, + radiansToDegrees: function(/* Number */n){ + // summary + // Convert the passed number to degrees. + return (n*180)/Math.PI; // Number + }, + + factoral: function(/* Number */n){ + // summary + // Return the factoral of n. + if(n<1){ + return 0; // Number + } + var ret=1; + for(var i=1; i<=n; i++){ + ret*=i; + } + return ret; // Number + }, + permutations: function(/* Number */n, /* Number */k){ + // summary + // TODO + if(n==0 || k==0){ + return 1; // Number + } + return (this.factoral(n)/this.factoral(n-k)); + }, + combinations: function(/* Number */n, /* Number */r){ + // summary + // TODO + if(n==0 || r==0){ + return 1; // Number + } + return (this.factoral(n)/(this.factoral(n-r)*this.factoral(r))); // Number + }, + bernstein: function(/* Number */t, /* Number */n, /* Number */ i){ + // summary + // TODO + return (this.combinations(n, i)*Math.pow(t, i)*Math.pow(1-t, n-i)); // Number + }, + gaussian: function(){ + // summary + // Return a random number based on the Gaussian algo. + var k=2; + do{ + var i=2*Math.random()-1; + var j=2*Math.random()-1; + k = i*i+j*j; + }while(k>=1); + return (i * Math.sqrt((-2*Math.log(k))/k)); // Number + }, + + // basic statistics + sd: function(/* Array */a){ + // summary + // Returns the standard deviation of the passed arguments. + return Math.sqrt(this.variance(a)); // Number + }, + variance: function(/* Array */a){ + // summary + // Find the variance in the passed array of numbers. + var mean=0, squares=0; + dojo.forEach(a, function(item){ + mean+=item; + squares+=Math.pow(item,2); + }); + return (squares/a.length)-Math.pow(mean/a.length, 2); // Number + }, + + // create a range of numbers + range: function(/* Number */a, /* Number? */b, /* Number? */step){ + // summary + // Create a range of numbers based on the parameters. + if(arguments.length<2){ + b=a,a=0; + } + var s=step||1; + var range=[]; + if(s>0){ + for(var i=a; i<b; i+=s){ + range.push(i); + } + }else{ + if(s<0){ + for(var i=a; i>b; i+=s){ + range.push(i); + } + }else{ + throw new Error("dojox.math.range: step must not be zero."); + } + } + return range; // Array + }, + distance: function(/* Array */a, /* Array */b){ + // summary + // Calculate the distance between point A and point B + return Math.sqrt(Math.pow(b[0]-a[0],2)+Math.pow(b[1]-a[1],2)); // Number + }, + midpoint: function(/* Array */a, /* Array */b){ + // summary + // Calculate the midpoint between points A and B. A and B may be multidimensional. + if(a.length!=b.length){ + console.error("dojox.math.midpoint: Points A and B are not the same dimensionally.", a, b); + } + var m=[]; + for(var i=0; i<a.length; i++){ + m[i]=(a[i]+b[i])/2; + } + return m; // Array + } +}); + +} |