How to dynamically create a struct?

I want to create a struct with the number of fields decided based on some user input. What's a good way of doing this? Or should I be using a cell or matrix instead?

Thanks

Answer 1

[KSSV]

a = struct ;

for i = 1:10
    a(i).x = i ;
    a(i).y = i+1 ;
end

It depends on how your structure is.

[Keith Lewis]

Thanks, it's close to what I want to do.

What I'm doing is running a model of cyclist travel times along a road. I have a simulink simulation to do this, and I will run it perhaps 1000 times.

Then I want to save the time that each cyclist gets to each intersection along the road. The user will define the number of cyclists (times the model is run) and the number of intersections.

So the a(i) I guess would be for my cyclists, with the i being the cyclists' id number. But how can I create more fields based on the user input?

So like if there are 2 intersections, a.x and a.y is fine. But what if there's 50 intersections? How can I make it handle any number of intersections?

[KSSV]

a = struct ;
for i = 1:10
    for j = 1:10
        a(i).x(j) = rand ;
        a(i).y(j) = rand+1 ;
    end
end

[Walter Roberson]

Index a cell array or multidimensional array. x(intersectionnumber, visitnumber)

Answer 2

[Walter Roberson]

TheStructure = cell2struct( cell(1, length(NamesCell)), NamesCell, 2 )