What is an effective way to way logarithmic bin data with a constant number of points per decade?

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  In one of my projects, I leave cuts on a timeline. And it seems that the position of a few clips has been accidentally changes. I need to have the same position for all the clips. Is there a way to define the position of all the clips in the world - what is the best way to tacke this? Thanks in advance. -renized

  Press A key for the track Selection tool.  Click the first clip that you want to settle and every item after that will be also selected.  You can move them as a group.

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• The most effective way to log data and read simultaneously (DAQmx, PDM) high data rates

  Hello
   
  I want to acquire the data of several Modules cDAQ using several chassis to
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  My question: what is the best and most effective way to save and read data at the same time?

  First of all, I use an architecture of producer-consumer and I don't want to write and display the data in the same loop. I expect two possibilities:

  [1] to use the 'DAQmx configure logging.vi' with the operation 'journal and read' to write the data to a PDM file. To display the data in a second loop, I would create a DVR samples documented and 'sent' the DVR for the second loop, where the data will be displayed in a graph (data value reference). This method has the disadvantage that the data of all channels is copied into memory. Correct me if I'm wrong.

  [2] use 'DAQmx configure logging.vi', but only with the "journal" operation to write the data to a PDM file. To view the selected data, I had read a number of samples of the TDMS file in the second loop (I'm currently writing the TDMS file). In this case, I have only one copy data from the selected channels (not), but there will be more HARD drive accesses necessary.

  What is the most effective and efficient solution in this case?

  Are there ways to connect and read data with high frequencies of sampling?

  Thank you for your help.

  You say that the measurement time is 10 minutes. If you have 40 channels and you enjoy all CHs at 100 kHz, it is quite a number of values.

  In this case, I always try to approach under the conditions of use. If a measure is only 10 minutes, I just connect all PDM data and create a graphic module that could be in the same loop of consumers where connect you the data. You can always work on the raw data files big offline afterwards, the extraction of all the information you need (have a look at the product called NI DIAdem: http://www.ni.com/diadem/)

  The main issue is that the user needs to see in the graph (or perhaps a chart can be useful too). Lets say that the graph is 1024 pixels wide. It makes no sense to show multiple data to 1024 points, Yes? Every second will produce you 100 data points k per channel. What is the useful information, which should see your username? It depends on the application. In similar cases, I usually use some kind of data reduction method: I use a moving average (Point by point Mean.VI for example) with a size of the interval of 100. This way you get 100 data points of 1000 per channel every second. If you feed your graph every second with these average values, it will be able to data points in 1024 of the store (as a default) by channel (curve), which is a little more than 10 minutes, so that the user will see the entire measurement.

  So it depends on the frequency at which you send data to the consumer. For example, collect you values 1024 by iteration of the producer and send it to the consumer. Here you can make a normal means calc or a bearing (according to your needs) and he draw a graphic. This way your chart will display only the values of the last 10 seconds...

  Once I programmed some kind of module where I use a chart and not a graph, and the user can specify the interval of the absolute timestamp that is traced. If the data size is larger than the size of the chart in pixels, the module performs an average calculation in order to reduce the number of data points. Of course, if you need to see the raw data, you can specify an interval that is small. It all depends on how you program zoom functions, etc... In my case I hade a rate of 1 Hz, so I just kept all data in RAM limiting the berries to keep 24 hours of data, so that technicians could monitor the system. In your case, given the enormous amount of data, only a file read/write approach can work, if you really need access to all of the RAW data on the fly. But I hope that the values of working capital means will be enough?

• What is the best way to sync contacts with a host of webdav?

  I use Thunderbird and Contacts Android as of client applications with an owncloud 8 hosted remotely. I have activated the application Contacts on Owncloud and now I want to sync the contacts between these systems. What is the best way to do it?

  I try to get sorted first Thunderbird. I tried Addressbooks Synchronizer, but currently, it gives me a message telling me that my credentials are wrong or is sitting silently, do nothing. I am aware that it is a file synchronization, the method of synchronization not saved, so it is not ideal, in any case.

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  WebDAV my initial reaction was sogo connector.
  These guys recommend the same http://kb.mozillazine.org/Sharing_address_books

  Here http://www.sogo.nu/english/downloads/frontends.html

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• What is the best way to read data series high speed?

  My goal is to read 14 bytes of binary data of an instrument on the serial RS232 (460800 baud) to 2000 Hz. I didn't get a card series high speed again so I am currently using the standard serial port (115200 baud) and reading at 400 Hz I have configure the port series, empty the buffer, and then enter a while loop to read incoming data. I have a visa 14 bytes read by interation seconds 0.0025 (400 Hz). However it seems that the sensor is spewing data faster that labview can read because the bytes are accumilating in the port. After some time the buffer fills and the program fails.

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  Hello

  I think it would be good to read several points in a loop, and keep the loop less than 1000 Hz.  I found in the past, have something to run faster than about 10ms tends to fall down when windows loses interest in the process.  So yes, choose the slower you can get away with reading samples - for example to read every 10ms and read 20 samples every time. You should be able to configure your serial port in order to buffer the samples that I guess.

  Also and the issue of windows - if you use a loop "timed" instead of a while loop, so you can force it to an integer value including the ms.  You can also assign a dedicated processor and set the priority to 100, which means that it is less likely to elapse and decide to scan your hard drive for viruses or consult your account e-mail or what he does when he's bored with your program.  Also it "' tells you if the loop has taken longer that planned to run - you can use this to help iron out bugs etc. - report and/or to the user if you missed a few samples.

  http://zone.NI.com/reference/en-XX/help/371361H-01/Glang/timed_loop/

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• What is the right way to collect data XY?

  How our works of Labview code is very poor. We want to do the following: initialize a DAC and then in a loop: 1. read from an ADC or a counter. Trace playback as a point on a XY Chart (DAC setting like x, ADC read as y) 2. Assign the CAD a new value 3. Wait a while for the equipment to balance 4. Read the ADC again, etc. I don't know a good way to keep the data and send it to the XY graph. Our former program initialized a table 2D, with a column being the ramp CAD and the other holding all zeros. Then, as the data have been collected, zeros have been updated with the data. This method is not good, because the graph has always shown a flat curve until all the data, instead of scaling properly the limits of actual data. Is there a tutorial or an example to help with this concept? I basically understand the help of error and flow control task, but I don't have a knowledge of the shift registers and initialization.

  Rgann wrote:
  Our former program initialized a table 2D, with a column being the ramp CAD and the other holding all zeros.

  You must initialize the array 2D with the ramp for x and the line is that contains all the NaN. Any point that contains a NaN value will not appear on the graph.

  Usually, I prefer to keep the range constant x instead of with each new point scale, but if you want to keep the x scale tight, you can update the min and max range using nodes of property according to the current insert point.

  You already use a shift register (or feedback node) to contain your table, so this should be OK, as is.

  Also remember that if the ramp is linearly spaced, you can use a waveform graph. You just need to set 0 x and dx accordingly. (A xy chart is necessary only if the points are not evenly spaced in x.)

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• The best way to migrate data... Opinion please...

  Guys,

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