程序如下：这里为什么rows能对col操作？

Question

 [values rows]=max([2 7 42;
9 14 8;
10 12 45])

values =

10 14 45

rows =

3 2 3

>> [value col]=max(values)

value =

45

col =

3

>> row=rows(col)

row =

3

Answer 1

Matlab中rows()函数的作用：返回引用或数组的行数。语法使用：ROWS(array)；参数：Array 是需要得到其行数的数组、数组公式或对单。元格区域的引用：实例：公式“=ROWS(A1:A9)”返回9，=ROWS({1，2，3； 4，5，6；1，2，3})返回3。

Answer 2

这里的rows是一个方法，你可以调用，不是咱们平常的行的意思！你可以看看help rows：function nrows = rows(cursor)%ROWS Get number of rows in fetched data set.% NROWS = ROWS(CURSOR) returns the number of rows% retrieved by a database fetch operation. CURSOR is% a cursor structure in which all elements have values.%% Example:%% nrows = rows(cursor)%% upon execution of the function nrows contains the% the number of rows returned by the fetch.%% cursor=exec(conn,'select * from employees');% cursor=fetch(cursor);% nrows=rows(cursor)%% nrows = 9%% indicating there are 9 rows returned by FETCH.%% See also FETCH.% Author: E.F. McGoldrick, 09-02-97% Copyright 1984-2003 The MathWorks, Inc.% $Revision: 1.14.4.2 $ $Date: 2004/04/06 01:05:11 $%if isempty(cursor.Cursor)nrows = -1;return;endif ~isempty(cursor.Fetch)nrows = double(rowsFetched(cursor.Fetch));elsenrows = -1;end;