Slow down. This has absolutely nothing to do with recusrsion. Next, there is absolutely no need to use eval. You are making things WAY too complicated.
You want to create a title that looks like this:
Equatorial Pacific : Lon: 94.98 E Lat: 0.25 N
Given inputs of lati and loni as variables. So, first, can you create that string? You could do so as simply as this:
titlstr = ['Equatorial Pacific : Lon: ',num2str(loni),' E Lat: ',num2str(lati),' N'];
Then just call title using that input.
title(titlestr)
As simple as those two lines. There is nothing remotely recursive about it, nor is there any need for eval.
