/// <summary>
/// Matlab index.
/// </summary>
/// <param name="vec"></param>
/// <param name="indices"></param>
public VectorScatterRef(VectorBase <TMathNetVec, TConcreteVec> vec, IEnumerable <double> indices)
{
// Check
NumericTool.CheckIndices(indices);
this.vec = vec;
this.indices = indices.Select(i => (int)i - 1).ToArray();
}
internal MatrixSliceRef(Matrix mat, IEnumerable <double> rowIndices, IEnumerable <double> colIndices)
{
// Check.
NumericTool.CheckIndices(rowIndices);
NumericTool.CheckIndices(colIndices);
this.mat = mat;
this.rowIndices = rowIndices.Select(d => (int)d - 1).ToArray();
this.colIndices = colIndices.Select(d => (int)d - 1).ToArray();
}
/// <summary>
/// Items inside <paramref name="indices"/> should all be integers.
/// </summary>
/// <param name="indices"></param>
public static void CheckIndices(IEnumerable <double> indices)
{
var noneInts = indices.Where(d => !NumericTool.IsInteger(d)).ToArray();
if (noneInts.Length > 0)
{
throw new ArgumentException($"Invalid index(ices) {string.Join("/", noneInts)}. Expect integer.");
}
}