Javascripts > Misc Javascripts > Matrix Multiplier
Script Title: Matrix Multiplier
Description: This script multiplies matrices of any size.
Example: Available
Credit: Script created by Josh Sorensen
Copy the following code into your <HEAD></HEAD> tags.<script language="JavaScript"> function siz(form){ var possible1=form.m1W.value; var possible2=form.m2H.value; if (possible1==possible2){ var H=form.m1H.value; var W=form.m2W.value; var element1=document.createElement('tr'); var matrix1=document.createElement('td'); for (var g=0;g<H;g++){ var lf1=document.createElement('br'); matrix1.appendChild(lf1); for (var i=0;i<possible1;i++){ var o1=document.createElement("option"); var t1=document.createElement("textarea"); t1.setAttribute("id",""+g+","+i+" a"); t1.setAttribute("cols","4"); t1.setAttribute("rows","1"); o1.setAttribute("value",i); o1.appendChild(t1); matrix1.appendChild(o1); } matrix1.appendChild(lf1); } element1.appendChild(matrix1); var matrix2=document.createElement('td'); for (var j=0;j<possible2;j++){ var lf2=document.createElement('br'); matrix2.appendChild(lf2); for (var k=0;k<W;k++){ var o2 = document.createElement("option"); var t2 = document.createElement("textarea"); t2.setAttribute("id",""+j+","+k+" b"); t2.setAttribute("cols","4"); t2.setAttribute("rows","1"); o2.setAttribute("value",k); o2.appendChild(t2); matrix2.appendChild(o2); } matrix2.appendChild(lf2); } element1.appendChild(matrix2); var table=document.getElementById('t'); table.tBodies(0).appendChild(element1); } else {document.all.sp1.innerHTML="no Solution"} } function solve(form){ var H=form.m1H.value; var W=form.m2W.value; var possible1=form.m1W.value; var table=document.getElementById('s'); for (var x="0";x<H;x++){ var element2=document.createElement('tr'); table.tBodies(0).appendChild(element2) for (var y=0;y<W;y++){ var z3=0; for (var z=0;z<possible1;z++){ var som1=""+x+","+z+" a"; var som2=""+z+","+y+" b"; var z1=document.getElementById(som1).value; var z2=document.getElementById(som2).value; var z3=z3+(z1*z2) } var matrix4=document.createElement('td'); element2.appendChild(matrix4); var txt1=document.createTextNode(" "+z3+" "); matrix4.appendChild(txt1); }} } </script>
Copy the following code between the <BODY></BODY> tags of your html page.<form id="form1"> 1st Matrix Dimensions<TEXTAREA ID="m1H" COLS="4" rows="1">1</TEXTAREA> x <TEXTAREA ID="m1W" COLS="4" rows="1">1</TEXTAREA><br> 2nd Matrix Dimensions<TEXTAREA ID="m2H" COLS="4" rows="1">1</TEXTAREA> x <TEXTAREA ID="m2W" COLS="4" rows="1">1</TEXTAREA><br> <input name="button" type=button value='Get Matrix' onClick="siz(this.form)"><br> <input name="button3" type=button value="solve" onClick="solve(this.form)"><br> <span id="sp1"></span> <table id="t" border="5" cellspacing="15"></table><br> <table id="s" border="5" cellspacing="8"></table> </form>
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