Initial data commit

Task/Kronecker-product/JavaScript/kronecker-product-3.js

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+// matkronprod2.js
+// Prime function:
+// mkp2(): Return the Kronecker product of the a and b matrices
+// Note: both a and b must be matrices, i.e., 2D rectangular arrays.
+function mkp2(a,b) {
+  var m=a.length, n=a[0].length, p=b.length, q=b[0].length;
+  var rtn=m*p, ctn=n*q; var r=new Array(rtn);
+  for (var i=0; i<rtn; i++) {r[i]=new Array(ctn)
+    for (var j=0;j<ctn;j++) {r[i][j]=0}
+  }
+  for (var i=0; i<m; i++) {
+    for (var j=0; j<n; j++) {
+      for (var k=0; k<p; k++) {
+        for (var l=0; l<q; l++) {
+          r[p*i+k][q*j+l]=a[i][j]*b[k][l];
+        }}}}//all4forend
+  return(r);
+}
+// Helper functions:
+// Log title and matrix mat to console
+function matl2cons(title,mat) {console.log(title); console.log(mat.join`\n`)}
+// Print title to document
+function pttl2doc(title) {document.write('<b>'+title+'</b><br>')}
+// Print title and matrix mat to document
+function matp2doc(title,mat) {
+  document.write('<b>'+title+'</b>:<br>');
+  for (var i=0; i < mat.length; i++) {
+    document.write('&nbsp;&nbsp;'+mat[i].join(' ')+'<br>');
+  }
+}