How can Matlab read a specific column from a csv file?

To read a specific column of data from a CSV file, you can use either the csvread or readmatrix function to read the entire CSV file and then extract the data from the desired column.

Here is an example code for reading the data in the second column of the CSV file data.csv:

data = readmatrix('data.csv'); % 读取整个CSV文件
column_data = data(:, 2); % 提取第二列数据
disp(column_data); % 显示第二列数据

In the code above, the readmatrix function is used to read the entire CSV file, then the data(:, 2) statement is used to extract the data from the second column, and finally the disp function is used to display the data from the second column.

In addition, if the CSV file contains a header, you can specify the number of rows to skip using the ‘NumHeaderLines’ parameter in the readmatrix function.

data = readmatrix('data.csv', 'NumHeaderLines', 1); % 跳过第一行表头
column_data = data(:, 2); % 提取第二列数据
disp(column_data); % 显示第二列数据

This allows you to skip the header row and only read the data part.