how to plot column vs column from csv file using readmatrix?

Question

0 个投票

I have a csv file that is named data,that contains 03 columns: clock,volt_a and volt_b:

array=readmatrix('data.csv');

plot(array)

when I readmatrix the csv file, it shows the data without its column's name.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

Answer 1

KSSV 2021-6-23

编辑：KSSV 2021-6-23

1 个投票

You need to specify the column which you want. Read about MATLAB indexing.

 array=readmatrix('data.csv');
 plot(array(:,1),array(:,2),'r',array(:,1),array(:,3),'b')
 legend('col2','col3')

OR

 array=readmatrix('data.csv');
 plot(array(:,1),array(:,2),'r')
 hold on
 plot(array(:,1),array(:,3),'b')
 legend('col2','col3')

KSSV 2021-6-23

You need to know read about plot.

Walter Roberson 2021-6-23

 array=readmatrix('data.csv');
 plot(array(:,1),array(:,2:3))
 legend('col2','col3')

would not allow you to choose line colors without a slight bit further work, but is often good enough.