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I wouldn't be concerned about plotting too much data. Kst just eats
it up. I regularly plot multiple channels with x1000 over sampling
at high sample rates and I never have a problem. <br>
<br>
<div class="moz-cite-prefix">On 4/02/2016 10:53 AM, Barth
Netterfield wrote:<br>
</div>
<blockquote
cite="mid:CAEyH+JeYQ-DET=rCZFJS-Rk1GRbv2+hn8O9zTGN5PPAMf4v=EA@mail.gmail.com"
type="cite">
<div dir="ltr">Only non-redundant lines ever get sent to the
graphics card, so that really won't matter.
<div>How many points are you plotting?</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Feb 3, 2016 at 6:50 PM, Daniel
Miller <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:dmiller@vitalconnect.com" target="_blank">dmiller@vitalconnect.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">huh... yeah, that might well work!! It'll be
plotting three times as much data as it really is
receiving, but what the heck, we have Nvidia graphics
cards...
<div><br>
</div>
<div>Thanks, I'll try that!!</div>
<div><br>
</div>
</div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Feb 3, 2016 at 3:48
PM, Ben Lewis <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:benlewis003@gmail.com"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:benlewis003@gmail.com">benlewis003@gmail.com</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hi Dan,<br>
<br>
It sounds like each channel has its own sample
rate (or is asynchronous).<br>
<br>
In cases like this I use the channel with the
highest sample rate for the time stamp. Then for
all other channels I use the old value until it
is updated.<br>
<br>
For example<br>
<br>
timestamp, data_x, data_y, data_z<br>
0, 10, 10, 10<br>
1, 20, 10, 10<br>
2, 30, 20, 10<br>
3, 40, 20, 10<br>
4, 50, 30, 10<br>
5, 60, 30, 10<br>
6, 70, 40, 10<br>
7, 80, 40, 10<br>
8, 90, 50, 10<br>
9, 100, 50, 20<br>
<br>
In this case data_x updates at the fast rate,
data_y updates at half of data_x and data_y
updates at 1/10 of data_x.<br>
<br>
Would this work in your case?<br>
<br>
Regards, Ben
<div>
<div><br>
<br>
<div>On 4/02/2016 10:36 AM, Daniel Miller
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">hmmm... well, I prefer
lines to points in kst2; the plots with
points are sort of hard to utilize, but
I'll take a look at it and see what it
looks like.
<div><br>
</div>
<div>Alternately, is there some way to
input three data files, but have them
plotted on one plot?? I haven't
really seen that in the manual
either...</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Feb 3,
2016 at 3:33 PM, Barth Netterfield <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:netterfield@astro.utoronto.ca"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:netterfield@astro.utoronto.ca">netterfield@astro.utoronto.ca</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div dir="ltr">As you have sort of
figured out, kst's data source
model will want you to have 3
different ascii files in this
case.
<div><br>
</div>
<div>But, if you just want to plot
points, and not lines, you can
use NaN as your bad data marker.</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">
<div>
<div>On Wed, Feb 3, 2016 at
6:30 PM, Daniel Miller <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:dmiller@vitalconnect.com" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:dmiller@vitalconnect.com">dmiller@vitalconnect.com</a></a>></span>
wrote:<br>
</div>
</div>
<blockquote
class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div>
<div>
<div dir="ltr">I have
kst2 working with
single plot stream...
that works very
nicely. At this
point, I'm using space
as separator between
fields.
<div><br>
</div>
<div>However, we have
a couple of data
streams which
contain multiple
data (x, y, z); in
this situation, what
our data would look
like is ( timestamp,
data), but the data
would be one of {
data_x, data_y,
data_z }. In other
words, the data
stream that I
receive from the
hardware, delivers
data_x, data_y,
data_z in separate
messages, with
different
timestamps.</div>
<div><br>
</div>
<div>I want kst2 to
read this ascii data
file and plot 3
separate graphs on
one plot. </div>
<div>I'm a little
confused about how
to do this, though; </div>
<div><br>
</div>
<div>for example, say
I have a line with
data for data_z;
this will look
something like:</div>
<div>timestamp data_z </div>
<div>however, I want
one file to contain
data for all three
streams, so I'm
guessing I need to
have empty fields
for the not-relevant
data; maybe
something like:</div>
<div>timestamp
unused_x unused_y
data_z</div>
<div>timestamp
unused_x data_y
unused_z</div>
<div>etc...</div>
<div><br>
</div>
<div>So first off, I
probably have to use
a different
separator rather
than space for
separator; but even
with comma, I still
have a problem; for
example:</div>
<div><br>
</div>
<div>timestamp, 0, 0,
data_z</div>
<div>timestamp, 0,
data_y, 0</div>
<div><br>
</div>
<div>Except that in
some cases, 0 is
valid data; I
*think* I need some
way to represent
"invalid data" in
the unused fields.</div>
<div><br>
</div>
<div>Is this
understandable??
How do I handle
this??</div>
<div>Dan Miller</div>
</div>
<br>
</div>
</div>
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<div class="gmail_signature"><span
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Barth Netterfield<br>
University of Toronto<br>
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