how to change the digit after decimal

I have few vectors which they have values like below

1.2 222.55 etc

matlab shows that with so many digit , I dont want, evenI tried to correct this by hand in xls which makes me tired

is there any solution to for example remove all digits until 1 or 2 or 3 or as you wish you ?

for example if my vectors which consists of 300 values, I want to do it for all of them and not one number

Thanks

Answer 1

[Walter Roberson]

This is not actually possible in binary floating point arithmetic, because 1/10 is not exactly representable in binary. However, you can get close to it by using

digits = 3;
newvalue = round(value * 10^digits) / 10^digits;

Answer 2

[Noam]

Try using format:

>> format long
>> ans

ans =

     1.222200000000000   1.222200000000000

>> format short
>> ans

ans =

      1.2222    1.2222

>> format bank
>> ans

ans =

            1.22          1.22

>> format shortG
>> ans

ans =

         1.2222       1.2222

>> format rat
>> ans

ans =

      6111/5000      6111/5000