CSV，逗號分開的文件，如果能快速的讀取這些文件中的數(shù)據(jù)，無疑會幫助我們解決很多問題。?

1、 只有數(shù)據(jù)的CSV文件，CSV file that includes only numbers.?

As an example, create a text file, named as 'data.csv' if you prefer, which includes the following data with any editor you like.

1,??2,??3,??4
5,??6,??7,??8
9,??0,??1,??2

? ?1) Read all the data into a 3X4 matrix.

Mat?=?csvread('data.csv');
disp(Mat);

? 2) Read part of the data with specification of the start index. What is important is the data is accessed from index 0 in the direction of row and column.

Mat?=?csvread('data.csv',?1,?2);
disp(Mat);

Result showing below.

7?????8
1?????2

? 3) Read only the specified range.?

Mat?=?csvread('data.csv',?0,?1,?[0,1,2,2]);
disp(Mat);

Note the starting index you specified in the second and third parameters is the same with the first two arguments in the fourth parameter matrix.?

2、 How to read a CSV file containing string data items.?

Create a file, named as 'datastr.csv' if you like. Add the following data.?

1,?2,?3,?Mine
4,?5,?6,?Yours
7,?8,?9,?His

One who try to use csvread shall encounter frustration. :(?

I propose another solution to solve this case.?

fid?=?fopen('datastr.csv');
dcells?=?textscan(fid,?'%f,?%f,?%f,?%s');
fclose(fid);
dcellneeds?=?dcells(1:3);
Mat?=?cell2mat(dcellneeds);
disp(Mat);

The result showing below.

1?????2?????3
4?????5?????6
7?????8?????9

Try it and good luck. :)