How can I remove quotes from my struct?

I have a struct like in the picture (EEG_all.event with 4 fields: type, latency, urevent, duration-each one is 123 rows). How can I remove the quotes from "type"?

Answer 1

[Ameer Hamza]

If by remove quotes, you mean convert it to numeric format then try

temp = num2cell(str2double({EEG_all.event.type}));
[EEG_all.event.type] = temp{:};

[Livia Legnazzi]

Yes this worked!!! Thank you very much!!

[Matt J]

@Livia - you should Accept-click Ameer's answer if it resolved your issue.

[Image Analyst]

I assumed that they were strings for a reason and that you didn't want to change them (you wanted them to remain strings).

If you don't want strings, then the more preferred approach is to just not create them as strings in the first place and then no conversion would be necessary after the fact. How did you create the structure array? Why did you make them strings then? Can you just make them numbers at that point, just like you did with the latency, event, and duration fields?

[Livia Legnazzi]

I used a code which was not written by me and which is pretty complicated so I prefer to add this rather than change the original code

[Stephen23]

@Livia Legnazzi: your question and this answer are about two different things: you asked how to remove the quotation marks (you can't, because they are not part of the char vector, just how it is displayed), and then you accepted an answer which shows how to convert a char vector to a numeric value. Converting from character to numeric has absolutely nothing to do with "removing" quotation marks.

Answer 2

[Image Analyst]

You can't. That's just how the variable editor displays it. You can't get rid of it anymore than you can get rid of the little icons on the column headers at the top of the columns, or the grid lines. They're just part of how MATLAB chooses to display the information. Note that the quotes are not in the data, they're there just for display to indicate that the field value is a string rather than a number. So

length(EEG_all.event(10).type)

will show 3, not 5, meaning that no quotes are in the string.