"from index 1 to 10"
Putting digits into fieldnames is not indexing. Your approach of forcing meta-data (pseudo-indices) into the fieldnames makes this task more complex than if you had used an actual structure array with actual indices:
"I have created a structure with a for loop "
Your task would be so much easier if you used actual indices (and not forcce pseudo-indices into fieldnames).
Probably something like a simple RESHAPE of a structure array would then do what you need.
