Github user takuti commented on a diff in the pull request:
https://github.com/apache/incubator-hivemall/pull/121#discussion_r144195570
--- Diff: core/src/main/java/hivemall/math/matrix/MatrixUtils.java ---
@@ -70,4 +77,259 @@ public void apply(int i, int value) {
return which.getValue();
}
+ /**
+ * @param data non-zero entries
+ */
+ @Nonnull
+ public static CSRMatrix coo2csr(@Nonnull final int[] rows, @Nonnull
final int[] cols,
+ @Nonnull final double[] data, @Nonnegative final int numRows,
+ @Nonnegative final int numCols, final boolean sortColumns) {
+ final int nnz = data.length;
+ Preconditions.checkArgument(rows.length == nnz);
+ Preconditions.checkArgument(cols.length == nnz);
+
+ final int[] rowPointers = new int[numRows + 1];
+ final int[] colIndicies = new int[nnz];
+ final double[] values = new double[nnz];
+
+ coo2csr(rows, cols, data, rowPointers, colIndicies, values,
numRows, numCols, nnz);
+
+ if (sortColumns) {
+ sortIndicies(rowPointers, colIndicies, values);
--- End diff --
I found lots of typos `indicies` in many different classes...it's `indices`
---
