Decimate table 1 d

Similar Questions

• Bug in decimate table 1 d

  There Appars to be a Bug in Decimate 1 d Array function if I understand correctly, this should work.

  See the attached VI.

  In LabVIEW 2010 VI attached, I have 2 decimate the functions of table 1 d. Each has exactly 16 outputs. Then I initialize arrays 2, 16 elements, the second table has only 1 element.

  The Decimate function which is 16 food items returns the appropriate output values.

  The powered Decimate small table function returns zero as the first element, which is incorrect. The first element is not equal to zero.

  Documentation of LabVIEW (LOL) does not mention what is going to happen when the size of the table to help D 1 function Array entry is less the number of outputs. It is assumed that the Deimate function returns all of the elements that did not exist in the table and empty on the rest.

  Why not Decimate 1 d Array work function as expected in cases where the size of the input array is lower number of outputs? Is this a BUG? Is there a solution?

  In fact, the detailed help for table Decimate indicates what happens when the number of items is too little.  And what you see is not a bug.

  Quote from the detailed help

  "If you remove an item from the input array it will 15 items. The last decimated table will have only 3 elements (3, 7 and 11) from item 15 was deleted. Since the function will only return arrays of the same size, 3 other decimated tables will drop their last element so that all the berries contain now 3. »

  If all the tables of output are truncated in the short table.  As table 1 a to 1 item and all the rest are zero, they are all truncated to zero element.  When you index a table to an index that does not exist (for example, empty element 0 of the array), you get the default data for this table type.

• Separate tables

  I have a 1 d table, and I want to divide it into two. I.e. first array will contain index(0,2,4,6,8...). Second table will contain index(1,3,5,7...). I try to avoid a for or while loop, but it is difficult to understand just with the table functions.

  

  Thanks for any suggestions.

  Decimate table 1 d

• How to check out items with an interval sets a 1 d table

  I would like to extract elements of a table 1 d with a fixed pitch. For example, I want to extract the elements of this array

  [1 2 3 4 5 6 7 8 9 10] with interval starting at 1 and 2, the results should be [1 3 5 7 9].

  I know that I can use to "decimate table 1 d" to perform this task. However, my range is determined by something else within my program. I don't know the interval in advance. I can't go on the block diagram each time just to specify the number of output terminals manually. Is there a good way to perform this task?

  Thank you very much

  Herb

  
  

• split comma-delineated in table 1 d complex

  I have delimited string in this format

  [0.866405665874481,0.127425819635391,0.983153462409973,-0.0711551383137703,0.955700755119324,-0.27884304523468,0.787182509899139,-0.501964211463928,0.512355387210846,-0.687117278575897,0.177220240235329,-0.777789652347565,-0.0876994803547859,-0.792799115180969,-0.324512422084808,-0.736825287342072,-0.517065346240997,-0.627932071685791,-0.666604995727539,-0.471743047237396,-0.767350137233734,-0.287838608026505,-0.819185018539429,-0.0853987112641335,-0.81872695684433,0.123056441545486,-0.761552691459656]

  The data contain pairs of complex numbers.  The first 2 numbers is a pair, a pair of next 2 numbers, next pair...

  How can I extract the number pairs and make a complex set of 1 d?

  This is the expected output:

  (0.866405665874481,0.127425819635391),(0.983153462409973,-0.0711551383137703),(0.955700755119324,-0.27884304523468),(0.787182509899139,-0.501964211463928),(0.512355387210846,-0.687117278575897),(0.177220240235329,-0.777789652347565),(-0.0876994803547859,-0.792799115180969),(-0.324512422084808,-0.736825287342072),(-0.517065346240997,-0.627932071685791),(-0.666604995727539,-0.471743047237396),(-0.767350137233734,-0.287838608026505),(-0.819185018539429,-0.0853987112641335),(-0.81872695684433),(0.123056441545486,-0.761552691459656)

  All gurus pls advise

  I used the string of worksheet to the table, table to decimate, then Re / Im at the complex.

  

• Split and searching in a table 2D-DAQ

  Hello

  I'm collecting data of a data collection that returns a 2D array.  I take 1000 samples of the 4 channels at once, and I returned a matrix of rank 2 column X 1000:

  The first column indicates the channel and the second column shows the value of the sample.

  I want to find this matrix for all values corresponding to a given channel and draw.

  That is, if the matrix looks like this:

  1 54.5

  2 42.4

  3 67.6

  4 15.2

  1 34.2

  2 22.5

  ...

  I want to extract all values in column 2 that have a value of 1 in the first column and draw a graph and repeat for column values equal to 2-4 1.

  I can't understand how to do this using the table operations.

  If the first column is still 1,2,3,4,1,2,3,4... then I would just index on the second column and use the Decimate 1 d table to separate data of different channel tables.  You must expand the 1 d 4 output items table Decimate.

• HOWTO call "n" independent instances of 'Decimate (continuous) .vi"without putting instances of"n"of the VI on the block diagram?

  I have a double 2D chart I want to decimate continuously using the ".vi (continuous) Decimate" located in the range of Signal Processing. This VI is set on reentrant preallouee clone because it uses a FGV to save the State of the call to.  What I could do, but do not want to, is having a huge index table and wire 20 + 1 table of DBL to 20 + unique VI instances decimate to ensure that each have their own data space and no 'cross-talk' doesn't happen, then 'picture of generation' all back after the fact.

  I'm almost certain, there is a much cleaner way to do it with only one instance of unique block diagram of the VI decimate using techniques of the call by reference.   I found my way to this link: Preallocated-Reentrant-VI-within-Parallelized-For-Loop that talks about something similar.  After reading pages of four and the detailed help about the function 'Open VI référence' my head is spinning again on what option I want to spend (0x08 or 0x40 + 0x100) to ensure that whenever a slna 2D table come in, each of them is decimated by using the same clone that was used the last time it was called.

  Although the DBL entry 2D array always has the same number of lines, now, it is not always in the future this number and ideal would not force me to create several references strictly typed in VI decimate that will have to change as grows the number of rows in the table 2D static DBL.

  Anyone ready to set up an example VI that takes an array 2D arbitrary of DBL as input, decimating each line using the same clone independent of the "Decimate (continuous) .vi" and outputs the newly decimated 2D Array of LDM?  Assume that each line uses the same factor of decimation and 'Sprawl' set to False.

  Necessity is the mother of all invention and since it upsets me when I read a post that has a similar problem with no resolution, I felt compelled to post mine here.   I'm sure it's better I can do within the current state of LabVIEW.   The only question I have is what happens if I put the call by reference for loop be parallelizable?  That trash completely the nature of 1 to 1 of what I intended?

  

• table resizing

  I connected the pressure and vacuum to 30 channels sensors HAVE on USB-6225. With appropriate slope and offset convert PS voltage as shown in the attached picture. I have channels number pair interface for pressure sensor and weird no sensor vacuum channels. I used a one-dimensional array inside my cluster to get all the tension measured 30 channels and inside the loop for, I'm doing the scaling to determine lb/po2 pressure or vacuum. I need to separate this value in table two, one for pressure data and an empty and store it inside my cluster for treatment on the line. I need help.

  Right now my Vi does

  Table index blood pressure data vacuum

  0                   1.17                                  1.3psi                                 0

  1                    1.18                                    0                                   -1.2psi

  2                    1.17                                  1.3psi                                0

  3                     1.18                                  0                                      -1.2psi.

  But I want her to do it

  Empty data index array voltage data table data table pressure index index

  0                   1.17                           0                    1.3psi

  1                    1.18                                                                       0                 -1.2psi

  2                    1.17                            1                  1.3psi

  3                     1.18                                                                       1                -1.2psi.

  Please, need help.

  If the data items are well spaced, odd, and even in the original table, you should be able to separate the data before the scaling in the data of pressure / depression with a function "decimate the table."

  jpg does not come through with any resolution, at least I couldn't see what you had done. That being said, do not use .bmp (I know that you do not have).

  

• reorganization of the data in the table

  This has probably been asked and answered before, but I can't seem to find it anywhere.

  I'm saving a bunch of data in a file of lvm in the form of a 1 d table. When I open the worksheet the data appears in this format

  0	2.525174
  1	0.390727
  2	4.00143
  3	0.020132
  0	2.525174
  1	0.390727
  2	4.00143
  3	0.020132
  0	2.525174
  1	0.390727
  2	4.00143
  3	0.020132
  0	2.525174
  1	0.390727
  2	4.00143
  3	0.020132

  0-3 is my four analog channels. I want the data to look like this when I open the file in excel:

  0	2.525174	2.525174	2.525174	2.525174
  1	0.390727	0.390727	0.390727	0.390727
  2	4.00143	4.00143	4.00143	4.00143
  3	0.020132	0.020132	0.020132	0.020132

  This way I can easily see which data points belong to which channel.

  Otherwise, it would be even better:

  0	1	2	3
  2.525174	0.390727	4.00143	0.020132
  2.525174	0.390727	4.00143	0.020132
  2.525174	0.390727	4.00143	0.020132
  2.525174	0.390727	4.00143	0.020132

  I'm pretty new to LV and can't seem to find a way to re - format the data before moving my "write.vi".

  Just in case this is helpful somehow, I enclose my vi.

  Thanks in advance!

  EDIT: accidentally attached the wrong file. This is the one.

  Hello.

  You can use the Decimate array with 4 outputs function to automatically create a single table for each channel, you can then use build array to merge all channels as an array of unique 2D (which would look like the second picture you posted). Finally, you can convert the table to format as in your third example. I hope that helps!

  Best regards.

• Downsampling (decimate) data csv huge

  Hi all

  I'm trying to re - sample (decimate) the csv data attached, fortunately we can I build a decimator to take values in the CSV (entrance) each number of lines and transfer them to a new file excel (output). Any suggestions?

  Thank you.

  If you have your open data in Excel, you can choose to save as tab Delimited Text "' this will allow you to interact directly with playback of worksheet VI illustrated here:

  

  Reading of all data lines used to handle data to extract individual columns using the table features in LabVIEW. I recommend you to read the help of LabVIEW for instruction on the i/o file, in addition to the manipulation of the table.

  See you soon,.

• Table of cleavage according to its index

  Hi all

  I want to have a 'demux' block which, having a table (2Nx1) as input, splits the data into two tables (Nx1) as output the first array index is even or odd...

  At first, I tried to implement this with a structure matter in a while loop:

  

  But this does not work because I can run ony this .vi when the outputs of the case have option "default if unwired" located on. And this will happen not a pair of paintings (Nx1), but a pair of paintings (2Nx1). The first table will be [value, 0, 0,..., value] and the second will be [0, value, 0, value...]

  I want to get rid of these zeros...

  Any tips?

  Thanks in advance!

  Try the table to decimate . That's probably all you need.

  Here are some general comments to your code in general:

  • As the number of iterations is known before the loop starts, you need a loop FOR. no need to wire N or compare the number of iterations. It will automatically browse for all items in the table of entry autoindexing and then exit the loop. In addition, output indexing on a loop is much more effective, because the table output sizes can be determined and allocated exactly before the start of the loop. With a loop, labview can do that.
  • If you 2012 LabVIEW, you can use conditional indexation on the exit tunnels.
  • You can wire the rest directly to the structure of the case and make a case 1 and the other 0. Less code! (See my signature).
  • To check the odd vs even, a logical operator AND with 1 is sufficient and effective.
  • The '-1' is before the loop because you have to do only once (well, the compiler recognizes loop invariant code and will in fact create the code compiled as if the "-1" have been before the loop, but why not be explicit?)
  • When you create a screenshot of the code, try no. to select anything.  Black dotted outlines are bothersome.

• Limit the size of the table of waveform graph

  I try to display two graphs to the user in the front panel.  Data are data from continuous waveform with 5 channels at 10ksps.  Chart 1 displays all of the data wiped out 1 on each slice of 50 samples and Figure 2 each sample but only for the last X seconds of data (adjustable seconds for the display of control).

  This code works, but it lacks memory very quickly, because in Figure 2 all data is stored although only 10 seconds can be displayed.   I have attached an image of a simplified version of the block diagram.

  I tried wrong with Replace table subset and turn table 1, D but just may not be quite right.  The timestamps are disabled, the timestamp is not incremenent, or the read buffer overflows DAQMX and it crashes.  Does anyone have a suggestion on how to create an array of size ended up with something like a FIFO buffer so that will plot the graph 2 correctly?  An example VI or the screenshot would be great.

  Thank you.

  

  The simple solution is to use the subset of waveform to get the data you want to display in the chart 2, then only write the chart instead of all the data.

  As a comment, you may want to max/min decimate things data for chart 1 instead of simple decimation. It will give you a much more accurate chart.

  The following message may be useful.

• Fatal error of Run-Time with function Decimate

  I have a buffer where the samples are interlaced (ch1, ch0, ch0, ch1,...) and I need to separate the handle, so I tried to use Decimate as suggested here.

  The code is very simple:

  Double interleavedSamples [100], ch0 [50] ch1 [50];
      
  Decimate (interLeavedSamples, 100, 2, 0, ch0);
  Decimate (interleavedSamples + 1, 100, 2, 0, ch1);

  but the second call to Decimate gives Fatal Run-Time Engine - too small table argument.

  That's not true, because with a factor of the decimation of dFactor, you can get samples of nut if the input stream is at least dFactor * (nut-1) + 1 and not dFactor * nut

  I tried a workaround solution, specifying 99 as parameters to sizeInBytes in the second call for help, but this does not work, because as written in the help file

  size = trunc(numberOfElements/dFactor) is the size of the output sequence

  and then only 49 items are returned in the buffer ch1.

  How Decimate can be used to separate the interlaced samples?

  You have to note that the size error is on interleavedSamples Decimate argument. Indeed, the function expects to have 100 items to treat from the item of interleadedSamples [1], so you need to size your table of departure as interleavedSamples [101]. Then, you will gain 100 measures and the second Decimate will correctly extract samples [1] to [99], leaving the sample (blank) [100] intact.

• convert the table less smaples per second

  Have great picture with 9 channels of data by time stamp.

  Timestamp shows that there are about 100 samples per second.

  I need to generate the table that displays only an average value per channel, per second.

  Faced with the 'picture of generation' and 'index' to get the picture right.

  Suggestions?

  markfranklin wrote:

  Faced with the 'picture of generation' and 'index' to get the picture right.

  Suggestions?

  I bag the building and indexing and discover the screw decimate in the range of Signal Processing.  Unless you're stuck with the basic version.

• Resizing by program "decimate the Array function.

  Is it possible to resize programmatically 'decimate 1 matrix function D' or another way to do it (I hope that I am not missed something easy)? I need to decimate a table 1 d in 'X' number of rows according to the 'X' channels that have been read from a file.

  For example, if I have a table length 1 d 18, and I read in 3 channels I would an array of 3 x 6. If I have a table length 1 d 18, and I read on 2 channels, I would like a table 2 x 9. Any idea on how to tell the number of lines to Labview I need a 1 d array?

  It seems that in earlier versions of LabVIEW, there is a VI that does what I'm looking for. I tried searching the pallette and here on the forums as well, but haven't come up with something that works.

  http://forums.NI.com/T5/LabVIEW/programmatically-resizing-decimate-array/TD-p/19880

  Thank you!

  -Andrew

  Exchange dimensions which feed you table of remodel or use the conversion table.  Because I can't tell from the description exactly where the picture is bad, one or the other of these ideas should fix.