decimals and splitting cell arrays

Hi,

I am using the example below to split cells and it works good. However, when I use it, it rounds values like 0.00178 to 0.0018. How can I do the same thing, but then keeping all the decimals?

I'm using this code in a 100031x1 cell and I get a double with rounded values

a={'0,0,0,2,2,0.39,0.49'
  '0,1,2,2,2,0.34,0.44'}
out=cell2mat(cellfun(@str2num,strrep(a,',',' '),'un',0))

[Paolo]

The values are not actually being rounded. It appears they are when visualizing out in the command window. If you actually check the values contained in out you will find that the values are correct.

For visualizing the full number in the command window, try to run

 format long

before executing your code. This will change the format used for display in the command window.

[Stephen23]

"However, when I use it, it rounds values like 0.00178 to 0.0018"

I doubt that any rounding is occurring. How values are displayed is a totally different thing to what values are stored in memory. Try changing the format.

[Thijs Obers]

yes, you are right, thank you!

Answer 1

[Stephen23]

There is no rounding occurring. Change the format to precision with which values are displayed, e.g.:

format long

Also note that you can make this conversion more efficiently and securely using sscanf (because unfortunately str2num hides an eval call inside):

>> a = {'0,0,0,2,2,0.39,0.49';'0,1,2,2,2,0.34,0.44'};
>> C = cellfun(@(s)sscanf(s,'%f,',[1,Inf]),a,'uni',0);
>> vertcat(C{:})
ans =
  0  0  0  2  2  0.39  0.49
  0  1  2  2  2  0.34  0.44