On 9/27/2021 1:06 AM, Leonard Mada wrote:
>
> Dear Bill,
>
>
> Does list.files() always sort the results?
>
> It seems so. The option: full.names = FALSE does not have any effect:
> the results seem always sorted.
>
>
> Maybe it is better to process the files in an unsorted order: as
> stored o
Dear Bill,
Does list.files() always sort the results?
It seems so. The option: full.names = FALSE does not have any effect:
the results seem always sorted.
Maybe it is better to process the files in an unsorted order: as stored
on the disk?
Sincerely,
Leonard
On 9/25/2021 8:13 PM, Bill
Hi,
If you can talk with your device through the terminal. One option is
using 'system2' in R to send the command to your OS.
Best,
Jiefei
On Sun, Sep 26, 2021 at 9:14 PM Roger Coppock wrote:
>
> How do I communicate directly with USB devices in R?
>
> Specifically, I want to read data from thi
What kind of disk do you use? The hardware differences might be important
to this issue.
Best,
Jiefei
Leonard Mada via R-help 于 2021年9月26日周日 下午9:04写道：
> Dear Bill,
>
>
> - using the Ms Windows Properties: ~ 15 s;
>
> [Windows new start, 1st operation, bulk size]
>
> - using R / file.info() (2nd
How do I communicate directly with USB devices in R?
Specifically, I want to read data from this device.
http://www.zyaura.com/products/ZGm05.asp
I have the USB message formats it uses, and they are quite simple.
- - Roger Coppock, rcopp...@cox.net
__
Dear Bill,
- using the Ms Windows Properties: ~ 15 s;
[Windows new start, 1st operation, bulk size]
- using R / file.info() (2nd operation): still 523.6 s
[and R seems mostly unresponsive during this time]
Unfortunately, I do not know how to clear any cache.
[The cache may play a role only
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