I have an array in the form of 

a = {'a','b',...'t'};

b = {'1','2',....'20'};

I'm doing stuff to plot my data sets (I have 20 of them) via loop, and I want to save my figures like so:

a1.jpg

b2.jpg

.

.

.

for all 20 data sets. 

So, my configuration is in the form of 

```
for i = 1:10

*do stuff to get plot*
save(....)???

```

I don't know how to do this. I have a h=figure; term, and I was expecting to do something along the lines of

```
save(h,'dataset_a(i)_b(i),'jpg')

```

However, the naming has to exploit the entries of my 'a' and 'b' array. How could I formally add string entries like so from arrays?