Re: str2double behavior

[Ben Abbott]

On Jun 6, 2011, at 2:15 PM, Michael D Godfrey wrote:

> On 06/06/2011 10:57 AM, Ben Abbott wrote:
>> On Jun 6, 2011, at 1:42 PM, Rik wrote:
>> 
>> 
>>> > 
>>> Julien,
>>> 
>>> > 
>>> > 
>>> Can you check what the following does?
>>> 
>>> > 
>>> > 
>>> str2double ({ "1.5", [2.5] })
>>> 
>>> > 
>>> > 
>>> If it returns
>>> 
>>> > 
>>> > 
>>> [ 1.5, NaN ]
>>> 
>>> > 
>>> > 
>>> then Octave will need to look at each value in the cell array.  Currently
>>> 
>>> > we only check that *all*
>>>  values are strings.
>>> 
>>> > 
>>> > 
>>> --Rik
>>> 
>> I'm running the same version of Matlab is Julien is.
>> 
>> 
>>>> >> 
>>>> str2double ({ '1.5', [2.5] })
>>>> 
>> ans =
>> 
>>    1.500000000000000                 NaN
>> 
>> Ben
>> 
>> 
> Just for the record, a somewhat newer Matlab says:
> 
> >> str2double({'1.5',[2.5]})
> 
> ans =
> 
>     1.5000       NaN
> 
> >> version
> 
> ans =
> 
> 7.9.0.529 (R2009b)
> 
> >> 

>> version

ans =

7.11.0.584 (R2010b)

The reason for the different number of digits in the output is because I had 
set my "numeric format" set to "long".

>> format short
>> str2double ({ '1.5', [2.5] })

ans =

    1.5000       NaN

>> format long
>> str2double ({ '1.5', [2.5] })

ans =

   1.500000000000000                 NaN

Ben