how could numbers be displayed only in 4 digits (also in answer of sprintf)

Does anyone know how could numbers be displayed only in 4 digits (also in answer of sprintf) [not more than 4)

a=3.78676789728978978978978789

sprintf('%d',a)= 3.786768e+000 % but i dont need this format

sprintf('%f',a)= 3.786768  % this is better but only 4 digits is needed

I need: 3.7867 or 3.786

Answer 1

[Fangjun Jiang]

sprintf('%4.3f',pi)

doc sprintf

[mohammad]

Thanks a lot

Answer 2

[topdawgnate]

Check out the sprintf help page

http://www.mathworks.com/help/techdoc/ref/sprintf.html

and then modify your code to this

    sprintf('%0.4f',a)

-Nate

[mohammad]

Thanks a lot