Importing and Plotting Data

3 views (last 30 days)
Paul
Paul on 18 Nov 2014
Commented: Paul on 18 Nov 2014
I have pasted 4 columns of data into a .txt file and then:
fileID=fopen('Lab5data.txt');
plot(data(:,1),data(:,2),data(:,3),data(:,4));
trying to plot all 4 on the same plot but im getting:
Undefined variable Data.
Error in Lab5Practice (line 42)
plot(data(:,1),data(:,2),data(:,3),data(:,4));
a few days ago i made a similar plot using the same method and it worked fine but today neither this nor the old one will work. I have not moved any files since then and the file path shows correct. What am i missing here?

Accepted Answer

Hikaru
Hikaru on 18 Nov 2014
It's because you have not define the variable data .
  5 Comments
Paul
Paul on 18 Nov 2014
i used the data = dlmread('Lab5data.txt') and it worked.
seems somehow, maybe when it was saved, its capitalized "Data" as well as another thing, strange. Ill watch out for it next time.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by