Positive and negative frequency of calculation deviation

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• How can I design square wave which has a positive and negative values equal to the other and separated from each other by controlled time or distance

  How can I design square wave which has a positive and negative values equal to the other and separated from each other by controlled time or distance, as indicated in the figure below. and enter this signal in a data acquisition.

  

  At the time wherever you go for the beautiful diadram, you could have done the vi

  Your DAQ would like a waveform (table of values and dt ak 1/sampling rate)

  If you set the sampling rate you know the length of the array, create a matrix of zeros and set the values of the two amplitudes...

  Because I don't want to connect other duties here are some photos

  And it does have a few drawbacks leaves to be desired in my solution, just think... rounding errors and what might happen if the tables are becoming more...

  

• SELECT statement: summing up a positive and negative value

  If I want to get the sum of the positive and negative values, can I do it like this?
  
  
  Negative:

  Select sum(amount) INTO negative_amt FROM order where amount like '%-%';

  Positive:
  

  Select sum(amount) INTO positive_amt FROM order where amount not like '%-%';

  If this is not the case, how should I go about this?

  SQL> SQL> With t As  2  (  3  Select   -100 c1 From dual Union All  4  Select -300    From dual Union All  5  Select -15.6    From dual Union All  6  Select 90    From dual Union All  7  Select 80    From dual Union All  8  Select 300    From dual Union All  9  Select -203.8    From dual Union All 10  Select 922.56    From dual 11  ) Select Sum(neg_num) neg_num, Sum(pos_num) pos_num 12    From 13    ( 14    Select Case When c1 < 0 Then c1 Else 0 End neg_num, 15           Case When c1 > 0 Then c1 Else 0 End pos_num 16    From t 17    ) 18  /
  
     NEG_NUM    POS_NUM---------- ----------    -619.4    1392.56
  
  SQL>
  

• Calculate if got only positive and negative values

  I have this problem that I need help.
  
  I have this table called MESSAGES. There fields client_name and AMOUNT like this:
  
  MESSAGES*.
  
  CUSTOMER NAME_
  Amy
  Amy
  Amy
  Bill
  Cheryl
  Cheryl
  
  AMOUNT
  500
  -200
  -100
  -111
  50
  100
  
  
  As noted, my client AMY has 3 quantity: 500, -200, -100. I want my PL/SQL in order to calculate to summarize these amount if the amount of the same client_name 1 has a value negative and positive, and all remaining the same if all of its values is positive or negative.
  
  Result:
  
  CUSTOMER NAME_
  Amy
  Bill
  Cheryl
  Cheryl
  
  AMOUNT
  200
  -111
  50
  100
  
  How am I suppose to do?

  Hey lee,

  hope this helps

  SQL> SQL> Create Table lee_test As  2  (  3  Select 'Amy' Name,   500    amt    From dual Union All  4  Select 'Amy'    ,    -200          From dual Union All  5  Select 'Amy'    ,    -100          From dual Union All  6  Select 'Bill'   ,    -111          From dual Union All  7  Select 'Cheryl' ,    50            From dual Union All  8  Select 'Cheryl' ,    100           From dual  9  );
  
  Table created
  
  SQL> SQL> Select Unique  2         Name,  3         Case When min_sign != max_sign Then Sum(amt) over (Partition By Name Order By Name)  4         Else amt  5         End amt  6  From  7  (Select Name,  8         amt,  9         min(sign(amt)) over (Partition By Name Order By Name) Min_sign, 10         Max(sign(amt)) over (Partition By Name Order By Name) max_sign 11  From lee_test 12  ) 13  Order By 1;
  
  NAME          AMT------ ----------Amy           200Bill         -111Cheryl         50Cheryl        100
  
  btw: are you chinese (cantonese??)
  

• Guagewith scale positive and negative scale

  Hi all

  I thought it was simple. I need a gas reading of 0 to + or - 180 degrees either side of GUE positive readings figures up to 108 degrees, and the other side negative readings to-180 degrees

  Several skeins

  Greg

  1. use the text tool and enter the values on the ends of the scale.

  2 properties: scale. Enter the minimum and maximum values.

  3. other ways also exist, such as the nodes property.

  Lynn

  

• positive and negative rotation numbers

  Hi all

  I create a roulette game that calculates the winning number based on the rotation of the main wheel. I'm if/else using statements to determine the winning number based on the rotation. I am tracking the rotation in the output panel. I want my rotation to go between 0 and 360, but the output panel trace 0-180, then it starts from "-180-0."

  The wheel can turn several times. No idea how to keep the positive numbers between 0 and 360, and do not have to write my if else to accommodate negative numbers?

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  var rot: Number = (whatever._rotation+360)%360;

• angles, positive and negative area on a plot of polar

  Is there a way to label the sector on a polar plot angles with +/-values? We generate a lot of bosses of directivity of sonar and angles scored from-180 to 180 instead of 0 to 360 have long been the norm. Looking at the definition of the curve and Polar - display the tab - it doesn't seem to be an obvious way to do it.

  Hi Greg,.

  Unfortunately, there is no way to do in tiara at the moment. I presented a report of Corrective Action to resolve this (#323394), and I hope that this feature will be included in a future version of DIAdem. Thank you for that bring to our attention.

  Kind regards

  Jackie

• Grid Y looking positive and negative in CS5

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  Monika said.

  Here it is:

  To change the origin of the rule in CS5 are the same as in CS4 and earlier versions, you can:

  (1) find and open the AIPrefs (Win talk) or Adobe Illustrator Prefs (Mac talk) of the file. It is a hidden file in the folder hidden settings of Adobe Illustrator CS5

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• How do you know if there are more positive or negative numbers?

  I'll try to explain my problem with an example, because I do not have labVIEW installed in the computer.

  I have 10 numbers and multiply to 10 other numbers

  and of course I get 10 results, after I have to show the value of meddium of this 10 results and must show the signal that most seem (+ or-)

  My problem is to show the signal, if I have 7 positive 3 numbers and negative numbers, how to measure and display the negative signal to the final?

  example:

  -0,3-0,8 1 0.3 0.6-0.7 - 0.1-0.5 0.3-0.4

  If I have to put in the final:

  -0.5

  Thank you

  You can do something similar (Simplified) altenbach proposed:

  

  If the output is true your table has more positive values.

• generation of buffer desired waveform ╔chantillonnage clock and clock frequency sample resulting

  Hello, I'm trying to generate a square wave on an ongoing basis for NI6221 DAQ to 2 kHz. I use the example of Cont Gen tension Wfm - Int Clk.vi, which works great for my needs. However, the synchronization frequency setting is sometimes different frequency resulting, according to the choice of the samples and the Cycles / buffer. Tracking dozn the origin of these variables, all come from the nodes property of the moment-DAQmx in Buffere waveform generation (multi) .vi, where the input and output frequencies are not the same. Now, why is it so? What is the way the rate is calculated? I guess it's related to an internal approximation of the Council divided by sweep sampling frequency, clock but how exactly?

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  Virgilio

  The AO sample clock is generated by dividing down the time base.  If you select a clock frequency sample that can not be achieved by dividing the time by an integer base, the sampling clock frequency will be rounded up to the available sample rate nearest (it might be interesting to note that tasks HAVE always round the frequency rather than rounding to the nearest available).

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  Update iTunes 12.5.1.21.

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  HP Officejet 8600

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• Specify a position and offset

  I received this message.

  Possible reasons:

  Measurements: Attempted to write a sample beyond the final sample generated. The build is stopped, so the sample specified by the combination of the position and the offset is never available.

  Specify a location and a shift that selects a sample up to, but not beyond, the final sample generated. The final sample generated can be determined by querying the total number of samples generated after that a generation stopped.

  Attempted to write example: 8000

  Property: RelativeTo
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  Property: Offset
  Corresponding value:

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  It would be much easier to help if you could post your code... you probably just change a setting or two (finished/continuous, of regeneration/non-regeneration, etc.).

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  Hi all

  I use a driver on 3rd for a stepper motor and I use USB6356 as the controller to drive the motor. Could you recommend some VI sample or tutorial on the position and the speed control of stepper motor?

  Thank you

  The best

  I think that what you are looking for is the LabVIEW SoftMotion Module:

  http://sine.NI.com/NIPs/CDs/view/p/lang/en/NID/14234

  Here is a good resource on stepper motor theory:

  http://www.haydonkerk.com/resources/StepperMotorTheory/tabid/192/default.aspx

  My recommendation would be to start from a counterexample of LabVIEW. These can be found in LabVIEW > help > examples > material input and output > DAQmx > input meter, output meter.

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