MATLAB: How can make a vector from a structure

Question

I have this structure from a data set I was sent and have to make a simple scatter plot with di and from the field 100 and yi from field 100. How do I turn each of those things into vectors so I can in turn plot them up. Im brand new to matlab so this is quite confusing to me any help would be great.

Answer 1

T(100).xi already IS a vector. You can simply use it as x:

plot(T(100).xi, T(100).yi, 'b-');
grid on;

Or you can take all of the 1000 from elements from all of the 1011 structures in your "T" structure array with brackets:

all_xi = [T.xi];
all_yi = [T.yi];
scatter(all_xi, all_yi);
grid on;