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In excel below formula will generate random number from a normal distribution with mean 10 and variance 1. Is there a way to set a fix seed so that i get a fix set of random numbers all the time? I am using Excel 2010
You can implement your own random number generator using spreadsheet functions. For example, C++11 has a Lehmer random number generator called
minstd_rand which is obtained by the recurrence
X = X*g (mod m)
g = 48271 and
m = 2^31-1
A1 you can place your seed value. In
A2 enter the formula:
and copy it down however far you need.
=A2/(2^31-1) and in
=NORM.INV(B2,10,1), copying as needed. Note that you can always replace the seed value in
if you want to turn volatile randomness back on.
The following screenshot shows 25 random normal variables generated in this fashion:
As you can tell from the histogram the distribution seems roughly normal.
setting seed for excel random number, https://answers.microsoft.com › en-us › msoffice › forum › all › random-n When using Rand() function to generate random number based on a random seed, does anyone have any suggestions on how excel defines the random seed? Does it define based on Time or other approach? If based on Time, then how excel defines random number based on date, hour, min, and sec to generate a false random numbers?
You could use a VBA UDF() based on the Rnd() function. See:
Repeating random variables in VBA
How to generate random numbers in Excel, I am trying to perform a calculation with a random number generator I Seeding is not possible if you use Excel functions to generate the Make a new sheet and setup the cells: A1: Seed B1: Multiplied C1: Random number How to Generate Random Numbers in Excel. To generate random numbers, first click the Data tab’s Data Analysis command button. Excel displays the Data Analysis dialog box. In the Data Analysis dialog box, select the Random Number Generation entry from the list and then click OK. Excel displays the
I am not pretending that it is a perfect solution, but that works for me. The beauty of it, is that I can assign a random number to a particular cell:
Public Function GetRandom(seed As Double, min As Double, max As Double) As Double Dim colrow As Double Dim range As Double range = max - min If (Application.Caller.Column() = Application.Caller.Row()) Then colrow = (Log(Application.Caller.Column() + 1) * Log(Application.Caller.Row() + 1)) * seed Else colrow = (Log(Application.Caller.Column() + 1) / Log(Application.Caller.Row() + 1)) * seed End If Rnd (-1) Randomize colrow test = Rnd * range - range / 2 GetRandom = colrow End Function
I my example, the seed value is in Z1 cell, but of course in can be in any other cell. It also allow me to setup min and max values.
Random number generator from a seed value, and examples. The Microsoft Excel RANDOMIZE function allows you to change the seed value used by the random number generator for the RND function. Randomize uses number to initialize the Rnd function's random-number generator, giving it a new seed value. If you omit number, the value returned by the system timer is used as the new seed value. If you omit number, the value returned by the system timer is used as the new seed value.
MS Excel: How to use the RANDOMIZE Function (VBA), You can generate random numbers in excel by using the rand() function. As far as I know, however, Excel does not let the user set the seed or retrieve it. Cite. The syntax for the RANDOMIZE function in Microsoft Excel is: Randomize ( [ seed ] ) Parameters or Arguments seed Optional. It is a numeric seed that will be used by the RND function to generate a random number. If no seed value is provided, Excel will use the system timer as the seed value for the RND function.
How to retrieve values generated by excel rand() function?, @RISK for Excel 4 and newer The random number generator used in @RISK is a portable random number generator based on a The seed value may be chosen randomly in Simulation Settings by activating the Choose Click on a worksheet cell where you want the random number to reside. Type the function =RAND() into the formula bar above the worksheet. Press the F9 key to change the RAND function into a static random number. Press the Enter key on the keyboard to display the random number into the selected cell.
2.20. Random Number Generation, Seed Values, and Reproducibility, The Data Analysis command in Excel also includes a Random Number you can later produce the same set of random numbers by planting the same “seed.”. But Excel computation offers at most 53 bits of precision. We get lucky with the computation for the first random number: x*a+c requires only 49 bits, where x=327680, a=1140671485 and c=12820163. But for the second random number, x*a+c requires 54 bits because x=11837123.
- there are references that suggest there is no such method. answers.microsoft.com/en-us/office/forum/office_2003-excel/…
- Are you simply trying to get a nonvolatile set of random numbers, or do you really need to control the seed?