Why is the data saved in a struct when 'To Workspace' block is used?

From a few days ago, every time I use to workspace block in a model the data is saved in a struct called ans (if the model is runned from the matlab) or in a struct called out (if the model is runned from the simulink). Do you know why? And can this be solved?

Answer 1

[stozaki]

"ans" is most recent answer.

ans

"out" is simulation output (default setting of model configuration)