Function resize

resize(matr: ChalkboardMatrix, rows: number, cols?: number): ChalkboardMatrix
Returns a matrix with the number of rows and columns changed.
Parameters
- matr: ChalkboardMatrix
  The matrix
- rows: number
  The number of rows to change to or (if the cols parameter is blank) the number of rows or columns (the size) to change to
- Optionalcols: number = rows
  The number of columns to change to
Returns ChalkboardMatrix
- Defined in Chalkboard.matr.ts:1597