Unknown ''type'' argument. ''type'' must be ''first'' or ''average''. Tolerance must be a scalar or a vector with the same number of columns as the first input ''X''. The first input, ''X'', cannot be a single, complex or sparse matrix. ''X'' must be a non-sparse real double matrix. The second input ''tol'', cannot be a single, complex or sparse matrix. ''tol'' must be a non-sparse real double scalar or row vector. The third input, ''type'', must be a character vector. ''type'' must be ''first'' or ''average''. No tolerance can be negative. No tolerance can be NaN. All the tolerances are Inf. The tolerance must include some finite values.