function bval = isnaninf(A)% call : bval = isnaninf(A)%  returns 1 if A contains an inifinite or a nan entry, otherwise%  returna 0%  input %     A         input matrix, vector or scalar%  output%     bval      1 if A has a infinite or a nan entry, 0 otherwise.if isnan(A) | isinf(A)    bval = 1;else    bval = 0;end