I keep getting error using plot not enough input arguments

B
Belinda_tee · Aug 29, 2024 · 2.3K views
Question
I keep getting error when I try to plot the following code and I don't really know what I'm doing wrong.   data = readtable('instr_04_01.csv'); load = data.Extension(2:89); displacement = data.Load(2:89); figure plot(load, displacement) the error I keep getting is; Error using plot Not enough input arguments.  
Expert Answer
Profile picture of Neeta Dsouza
Neeta Dsouza PhD Expert
Answered Nov 20, 2025
You aren't extracting the numbers correctly. Also load is expecting arguments and you're giving it an equal sign instead of a filename. DO NOT USE A BUILT-IN FUNCTION FOR YOUR VARIABLE NAME.
 
Try this:
 
filename = 'instr_04_01.csv'
data = readtable('instr_04_01.csv', 'ReadVariableNames', true)
theLoad = str2double(data.Extension(2:end));
displacement = str2double(data.Load(2:end));
plot(theLoad, displacement, 'b-', 'LineWidth', 2)
grid on;
title(filename, 'FontSize', 15, 'Interpreter', 'none');
xlabel('Load', 'FontSize', 15);
ylabel('Displacement', 'FontSize', 15);

 

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