How to take out units in a column

I am trying to do a 3D plot where I would plot the x and y coordinates over time, but when I try to use the plot3 command, it says all of the data needs to be numeric values.

Therefore, I am trying to take out the 'sec' shown in the first column when I import my data, but am having no luck.

I tried using

>> sscanf(data, '%f')

Error Message: First argument must be a string scalar or character vector.

I tried

>> num2str(data)

Error Message: Input to num2str must be numeric.

and I tried a few other ones which I realize wasn't even going to do what I expect it to do.

[Ameer Hamza]

What is the class of column time? Can you share a small sample file?

[EB]

I uploaded a sample .mat

[Ameer Hamza]

The column 1 have class of 'duration'. See my answer to convert them to double datatype.

Answer 1

[Ameer Hamza]

out.time = seconds(out.time);

[EB]

Awesome works perfectly!! Thanks!!

[Ameer Hamza]

Glad to be of help.