Experimental Physics and
Industrial Control System

Maren Purves <[email protected]> · Wed, 01 Dec 2010 10:58:03 -1000

Kasemir, Kay wrote:

Hi:
On 12/1/10 11:58 , "John Dobbins" <[email protected]> wrote:

If I use the Data Browser -> Inspect Samples feature I see that for
small values (e.g. 1e-9) the value is displayed as 0.00

.. because it's using the precision that was sent with the data when it has
to format the number as text.
EPICS/Channel Access just provides a precision number, no hint like
'use decimal' or 'use exponential notation', so it's always decimal.
The same issue applies to annotations added to plots.

Right.
Is there a way to fix this?

I don't know. Maybe somebody has a good idea?

The idea is/was there as well as the implementation.
We still use edd/dm at UKIRT and we have one channel
that currently displays 4.60e-6 (millibar pressure).
As we know that we always want to display the vacuum
in exponential notation. It's a 'text update' and it
has 'format="decimal- exponential notation"' - using
single quotes here to distinguish from the double quotes
in the format.
HTH,
Maren

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System