How to round a result to two decimal places

r=10 (4/3)*pi*r^3 Round the result to two decimal places

[Sarath J]

method 1: round(r)

method 2: format bank; r

Answer 1

[dpb]

   v=(4/3)*pi*r^3;
  >> format long g
  >> v
v =
          4188.79020478639
  >> round(v*100)/100
ans =
                   4188.79
>>

Answer 2

[Kirby Fears]

Mo'men,

Check out the round function.

r_rounded = round(r,2); % rounds to 2 decimal places

Hope this helps.

[dpb]

I was thinking there was something but didn't lookfor it to remind myself...much better as it's a builtin and general...

[Miquel]

The solution is good, but it keeps the zeros after the rounding. So, if the number was 2.3789 it is now 2.3800. I need to copy matrices and paste them in tables of a Word document, so I need the rounded numbers without the zeros. Is there a way to be able to get rid of the zeros to do the copy paste?

[dpb]

As another said, if it's precisely two decimal places you're wanting to keep, then format bank will fix the display in command window.

If your output is to something else, then use a specific format string and write to file or use the COM stuff and stuff directly into Word.

[Miquel]

Thanks for the mega-fast answer!

In principle I wanted to copy the matrices from the Variables window in MATLAB. I tried to copy them from the command window with the short g format, as you suggest, but then it is like copying a bunch of text and I don't manage that it gets pasted correctly in the table.

What do you mean with the COM stuff in Word?

Thanks

[Eleanor Betton]

You can write to word with the report generator function. I used this for rounding a table to go into this:

M = round(V*100)/100;
            C = num2cell(V);
            fun = @(x) sprintf('%0.2f', x);
            V = cellfun(fun, C, 'UniformOutput',0);
            V=array2table(V);

Answer 3

[Thabang Kekana]

12.22

Answer 4

[luke]

myAns = 2 * (-4-[6+3+(7-(1+8))+12]-3)+5

myAns =

-47

Round the result to two decimal places