If you have any questions which do not appear on this list,
please do not hesitate to contact
us directly.
- What
operating systems does FCS Express run on?
- What
is your refund policy?
- What
is a configuration file?
- What
is a countercode?
- What
is the difference between the demo, lite and professional versions?
- I
have saved my layout as a PowerPoint presentation. Can I edit the text
in the text boxes or on the plots?
- Why
are there access violations when I save and load files?
- Why
does the text on the right-most x-axis label cut off on my plot?
- How
does FCS Express implement software compensation?
-
How can I track a population in FCS Express?
- Why
do I get errors upon exiting FCS Express?
- My
computer which was running FCS Express had to be replaced. How do I
reinstall FCS Express on my new machine?
- Why does FCS
Express crash immediately upon starting up?
- Where
is the configuration information for FCS Express stored?
- How
can I set up FCS Express to read data saved by an Abbott CellDyne
Sapphire?
- How can
I set up FCS Express to read data saved by an Accuri C6?
- What
are the Resolution Options on the General Category of the plot
formatting screen?
- Why
do my dot plots appear sparse and/or blocky?
- Why does the
compensation on my Coulter FC 500 data seem incorrect?
- Why
won't FCS Express recognize the dongle after I've inserted it in the
USB port?
- Why
does my Windows 7 computer crash after installing the dongle drivers?
- Why do I get a
connection error when I try to use DDS or Publishing?
- How much memory
(RAM) can FCS Express use?
- How
can I best display my FCS 3.0 data acquired in BD FACSDiva?
- What
is Biexponential and Hyperlog?
- What
is the
best way to display my FCS 3.0 data acquired in BD FACSDiva
on a 4 decade log scale?
-
Why do I get the message that a data file exported from a Diva
experiment is invalid?
- Why is my
Geometric
Mean Always Zero?
Why is my Geometric Mean always Zero
Why is my
Geometric Mean always zero?
The Geometric mean is defined only for Positive Values. A more detailed
definition can be found on Wikipedia.
That means that if there is single cell with a value of zero, or below
zero, the Geometric Mean will be undefined. When this happens, FCS
Express displays a zero as the statistics result. Zero or negative
values in your data can often happen counterintuitively as a result of
compensation. In this case, the only way to have a valid
geometric mean is to eliminate the negative values by creating a gate
on the positive only values and applying the gate. You can then get a
valid Geometric Mean on those positive values.
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