Help with MATLAB Graphing Error Bars for 1D Arrays

[smileandbehappy]

Im trying to plot a graph with eror bars for two 1d arrays. But for some reason MATLAB won't let me do it. Can you please help me as quickly as possible as I am currectly sitting in a computer lab and am very tired.

My code is:

W = 10:10:60;
V1 = [0.103,0.223,0.351,0.436,0.555,0.664];
e = (+-0.05);
errorbar(W,V1,e)

thanks

 

[Ouabache]

your problem is with variable 'e', it must be a vector of same length as W and V1. It is okay to specify constants in a vector, but +- is not a valid prefix. Leaving off the +-, the plot will give a symmetric error-bar 2e long.

 

[tacman]

Hi there,

Thank you for reaching out for help with your MATLAB graphing error bars. I understand that you are currently in a computer lab and are feeling tired, so I will try to provide a quick and clear solution for you.

First, I noticed that you have defined your error value as "e = (+-0.05)". This is not a valid syntax in MATLAB. You need to use the "plus-minus" symbol, which is represented by a tilde "~". So your error value should be defined as "e = ~0.05" or "e = [-0.05, 0.05]" if you want to specify different positive and negative error values.

Secondly, you need to make sure that your error values are in the same format as your data values. In your case, your data values are in a 1D array, so your error values should also be in a 1D array with the same number of elements as your data array.

With these changes, your code should look like this:

W = 10:10:60;
V1 = [0.103,0.223,0.351,0.436,0.555,0.664];
e = ~0.05; % or e = [-0.05, 0.05]
errorbar(W,V1,e)

I hope this helps and you are able to successfully plot your graph with error bars. Let me know if you have any further questions or concerns. Good luck!