I see it quite a lot. It looks a bit like this:
It can be seen in Figure 3 that...
My gut feeling is that there is no reason to scream in the middle of a perfectly calm sentence. I would like to write it like:
It can be seen in figure 3 that...
However it seem to be very common. Which one is the recommended way of writing, and more importantly what are the reason(s) for using a capital letter there?