Clear Filters
Clear Filters

Why is my "plot" function not working?

5 views (last 30 days)
T = readtable('ELG3155_LAB3_part2_M_2V.xlsx', 'PreserveVariableNames', true);
x = T.("Time (ms)");
y = T.("Raw speed (mrad/s)");
grid on;
When i run this it says there is an error with my plot function, why?
Matt J
Matt J on 26 Mar 2023
We can't run the code (because it's an image and because the data hasn't been provided)

Sign in to comment.

Accepted Answer

Star Strider
Star Strider on 26 Mar 2023
Edited: Star Strider on 26 Mar 2023
Use the str2double function on the last four variables.
EDIT — (26 Mar 2023 at 10:28)
T = readtable('', 'VariableNamingRule','preserve');
VN = T.Properties.VariableNames;
x = T.("Time (ms)");
y = str2double(T.("Raw speed (mrad/s)"));
grid on

More Answers (1)

Walter Roberson
Walter Roberson on 26 Mar 2023
The first row has time 00. That is text not numeric.
Looking at the left justification it looks to me as if the second column is text rather than numeric.
  1 Comment
Walter Roberson
Walter Roberson on 26 Mar 2023
I checked in Excel itself, and sure enough, the 00 gives a warning about "Number stored as text", and all of columns 2, 3, 4 report the same thing.
If you use readmatrix() then everything will be converted to numeric.
Note: with default options, the 00 0 0 0 row will be detected as being header and will be skipped.

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!