How to index in for cycle

Hello,

I have a function called Intersection_elipsoid. The functions works like that:

[lat,lon]=Intersection_elipsoid() It gives me latitude and longitude.

I want to do a for cycle and use this function with matrix X. In matrix X there are some values I use in the intersection_elipsoid function.

The for function is called location and should go through matrix X and use Intersection_elipsoid function and give me some outputs.

The problem is that the for cycle gives me only the first value from the Intersection_elipsoid function. I do not know how to "say" to the for cycle that it should give me both values. If I write: [final_lat,final_lon]=Location(X)

m=length(X)
for i=1:m
    if (X(i,5)==6) && (X(i,6)==12)
    [XY,YX](i,1:2)=Intersection_elipsoid

is not valid in syntax.

If I write:

[final_lat,final_lon]=Location(X)
m=length(X)
for i=1:m
    if (X(i,5)==6) && (X(i,6)==12)
    final_lat(i,1)=Intersection_elipsoid

It gives me only the first value.

Is there a way how to do it?

Thank you

Answer 1

[jonas]

lat(i),lon(i)]=Intersection_elipsoid()

Consider preallocating your variables to avoid slow loops, by e.g. typing 'lat=nan(1,lenght(m))' before looping over m

[Stephen23]

Array preallocation? It is helpful when are you giving advice to beginners to show basic MATLAB concepts, like how to preallocate arrays.

[jonas]

Thank you, will do in the future