Hi all,
I am currently trying to resample x/y-data. In the waveform utilities,
there is a polymorphic routine that is able to perform resampling on
pairs of x and y arrays. So far, that's fine.
However, when using the waveform version of the polymorphic vi, I can
set i.e. FIR filtering and the
Hi LocalDSP,
I will try spline. So for x/y-pairs, coerce, linear and spline are
supported?
Thank you very much for your fast help!
Regards,
Matthias
One further question regarding spline: Is that suitable when I try to
drastically reduce the sampling frequency of my data? I.e., I have
data at 1 kHz, and reduce it to 5 Hz. Linear interpolation just
interpolates between the two neighbouring points AFAIK. What about
splines in this context?
Hi,
good point. But we have some noise, so low pass filtering is really
desirable. I will try the two-step process.
Thanks a lot,
Matthias
Yes, that's it. Thanks a lot!
Matthias
Hi,
I observe the following problem in LabView 7.0: I have a numeric
control with unit indicator. Depending on the value, the unit
indicator should change its prefix (kilo,milli,etc.) and the displayed
value is scaled accordingly. However, this does not work correctly:
The value gets scaled, but
Hi,
from a physical point of view: A physical quantity is a number and a
unit. I can convert the unit into any other compatible unit without
losing information. I can express the length of my finger in inches,
cm or km. The corresponding number changes, but the physical quantity
stays the same.
Hi,
I should have mentioned that I use the SI Notation in the indicator.
So that is really a feature, not a bug.
But the prefix isn't updated correctly.
Matthias
Hi,
thanks, that hint at least reduced the effort as I don't have to set
the scale min/max values every time.
Regards
Matthias
Hi,
yes: Gregs comment was right, setting that property keeps the axes
fixed. However, it is possible, to drop the cursor outside the visible
area. So I check every time and move the cursor back to the border of
the allowed area, when it is outside.
Regards
Matthias
Hi all,
I try to use the intensity graph as an xy-input device. The user
should be allowed to drag the cursor to enter the value. However, the
user can always move the cursor outside the plot area, which causes
the corresponding axis to rescale. I want to have strictly fixed upper
and lower
Hi,
thank you for your answer. Autoscale has always been turned off for
both scales.
The problem is not the scales being rescaled due to data, but due to
cursor movement. This does not seem to be affected by the Autoscale
properties.
Matthias
I have problems getting readings from an Agilent 34401 using the
LabView drivers from the IDN. I get VISA timeouts, error code is
-1073807339.
From time to time, it works, but most of the time (90%), it doesn't.
I have LabView 7 Express, VISA 3.0.1, communication is supposed to run
via GPIB.
Hi,
no, this is not possible as I explained before. Just use the vis
delivered with the LabJack or downloaded from the website.
Regards
Matthias
Hi,
the LabJack cannot be set-up for regular LabView DAQ.
But: There are vis in the LabJack distribution, located somewhere
under C:\Programs\LabJack (look out for ljackuw.llb). There are also
several examples. The vis simply mirror the corresponding c library
functions, as they are described in
Hi,
try the Configuration File vi's (a subpalette of File I/O). They
support a unique key / value structure as in typical windows .ini
files. You would only have to convert your data into a string which
can be saved as the value in the file. The data can also be saved in
different sections, thus
Depending on the travel range and accuracy, a simple linear
potentiometer could do the job.
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