Generating Sets Of Correlated Random Uniform Numbers 0-1?
Jun 25, 2012
I'm looking to generate correlated random unifrom numbers between 0 and 1 using the excel random number generator, rand(), and a user defined correlation matrix - without the use of a plugin. I realise there are plenty of risk plugins I could use, but was looking for something excel/vba reliant so I could distribute it without the user having to install anything.
I've tried using a cholesky matrix, but most of time it resulted in one of the numbers being 1, and higher that all the others.
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Oct 14, 2011
I've managed to write a random number generator that produces multiple sets with no repeating numbers per a set.
Now, to step it up a notch, I'm trying to create an even distribution of the numbers generated which is where I could use a hand. Here's my current code:
Code:
Option Base 1
Sub RandomNumberStrings()
Dim rndno As String, strg As String, msg1 As String
Dim r1() As String, r2() As String
[Code]....
Equaling 500 numbers generated as intended, but my target is to get every number with an equal frequency.
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Nov 21, 2006
im given an area and im asked to generate 10000 random numbers. how can i?
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Jul 26, 2013
How to generate semi-random numbers? I have a small sample (26 points) that I would like to extrapolate out and plot on a skewed bell curve. The numbers represent a ratio which can never be less than one. The average of my sample is 1.0149 and the standard deviation is 0.01234. When I use the random number generator tool in the data analysis pack, it generates mostly good numbers, but it also produces numbers like 0.98 and such that are never possible in my data. I've made a plot with the random numbers, including the sub-one ones, and then just adjusted the x-axis so that they wouldn't show on the graph, but I know that that's not the correct way to do it. My graph isn't skewed as much as it should be.
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Nov 10, 2008
I wanted to generate 11 random numbers between 1 and 10, which added up to 100 every time I pressed F9...
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Mar 8, 2007
1. I need to randomly generate either a 1, 6 or 12 every time I hit calculate (i.e. F9).
2. I want to specify the probablility of each result. For example, I want 12 to be the result 80% of the time, and 6 and 1 to be the result 10% of the time.
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Oct 24, 2013
I need to generate 8 (random) numbers which should range between 0 to 80 and the sum of those generated 8 numbers should be 80.? How can I achieve this.
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Feb 19, 2014
I need generating 40 rows (Columns of 17 (Columns A - Q) Random numbers (1 to 5) that will sum to specific values (60, 55..) in R Column, and to regenerate it on pressing any key.
The same has been done for one value in [URL] ..... but I need it for a set.
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Mar 29, 2014
I would like to ask if there's a way to generate a random 4 characters in one cell and the specific random 4 characters that has been generated will be copied until the last cell of my preferred choice?
The format that I want is that:
yymmdd / random 4 characters that has been generated / 4 numbers that will increment sequentially
For example:
in A1: 140330QWER0001
in A2: 140330QWER0002
in A3: 140330QWER0003
.
.
.
.
.
But here's the catch, the file that I am using when closed then opened again will generate another random 4 characters with the same format. If i opened this file tomorrow:
for example the date for tomorrow is March 31, 2014, the file will do:
in A1: 140331TYUI0001
in A2: 140331TYUI0002
in A3: 140331TYUI0003
.
.
.
.
.
I tried to record it, the Rand() function when copied will generate another 4 characters.
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Oct 20, 2009
I have a spreadsheet of 1000+ companies and I want to take a random sampling of 100 of them. I would assume this could be accomplished by auto-filling a numerical value to each line of data (which I did), then scrambling only the column with the numbers (which I can't figure out), and then selecting the entire text and resorting it to put the numbers back in order and then just work with the first 100 rows (which I can do, if I knew how to make the numbers random).
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Feb 10, 2009
Can anyone help, I'm trying to create some test data, eg 1000 rows in excel. In each cell a formula (?) returns some text such as Dog, Cat or Rabbit based on the probability Dog=0.5, Cat=0.3, Rabbit=0.2
I've come up with a messy solution of generating a random number between 1-100 and then using a lookup table where 1-50 = dog etc... it works but is long winded and difficult for other people to follow.
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Apr 24, 2014
I am trying to build an excel spreadsheet for a hockey program I'm coaching that will do the following:
Create 4 teamsThere will be a Team 1 White/Dark, and Team 2 White/DarkUse 2 lists to distribute players evenlyThere are a disproportionate amount of players on each list. There are 8 Majors, 12 Minors. 2 Majors maximum need to be on every team.Every week, the roster will be different (some don't show). I need to be able to hit 'randomize' and exclude certain people, and still have the lines 'relatively' similar This is an essence two 3 vs 3 games, with a white vs. dark on each side of the ice (2 half-ice games). If there are 3 majors on each side (6 in attendance), one side will have a white with 2 majors, the other side will have a dark with 2 majors.
I'd also like a way to keep track of who's played with/against who, so if I can export that data set to ensure I don't get a duplicate team...or a primarily duplicate team.
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Aug 14, 2014
Wondering if it is possible to generate a random 4 digit number based off an alphanumeric string?
Example;
Cell A1 has 123XVF1234
Cell A2 has 321AFW4321
In B1 I would like to have a 4-6 digit number that is generated based on the alphanumeric data in Cell A1 (and so on down the list). If that is possible, I would also need to be able to convert back the 4-6 digit number back to its original alphanumeric value
Example;
If B1 returns 643562 it would need to be able to be converted back to 123XVF1234
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Sep 18, 2009
I am working on a Random Cycle Count Generator that provides random SKU#s based on 3 separate columns of SKU listings. The user clicks a button to generate the SKU#s to cycle count for that day. What I would like to see is a date stamp in the columns next(B,D,F) to the referenced SKU listing(A,C,E) based on which SKU#s are generated. This will let me see the last date that the SKU was generated. I would also like it to automatically save after generating.
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Jan 29, 2013
So we had a month long, company paid (woohoo!) "weight watchers" challenge. On 1 worksheet ("Stats"), I have the Name of every Employee (A Column), then their Start Weight (B Column), End Weight (C Column), Department (D Column) and finally Location (E Column).
I know how sensative some people can be about their weight, so I locked the page and created another worksheet named "UI", which will display the "Average End Weight" for each department. So Human Resources would be the department in cell A2 on the UI sheet, with City 1 being the Column Header in cell B1. There are 8 cities (offices) and 23 departments.
So, for cell B2, I want to scan through the "Stats" worksheet and locate all of the cells in the department and location columns that read "Human Resources" and "City 1" respectively. Then grab the "End Weight" for every row that meets these 2 criteria, add them up, and divide by the number of "End Weights" that were grabbed.
My solution would be to make a separate column for each department (and then each city, so essentially 8 columns to represent all the cities for each department), use a nested (maybe 4) IF statements to then list only the end weight if that particular row meets the criteria, then at the bottom of each separate column, add all the shown numbers up and divide, then draw the information from THAT number into the "Average" cell on the UI worksheet. But it isn't very dynamic and if i want to use this sheet next year, there will be more employee info to be added and it would be a mess..further more, it would be...what...23 Departments x 8 Cities x 155 employees = ~28,500 added cells.
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Dec 16, 2013
I have three different sets of numbers on a r12m that I have to add and divide by different numbers and not quite sure I have the formula right as when I do it manually on a calculator it comes out different.
The formula I have put together is
=sum(O4:z4)/10)+(sum(o5:z5)/200)+(sum(06:z6)/1000)
This is the three rows of data
221121
2333443201142
402448314034292331351663
Using the formula above the result is 0.81 but if I do it manually on a calculator it is 1.6 (by doing each line individually and adding results)
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Sep 1, 2008
I'd like automate consists of entering 56 numbers (up to 3 digits, 000-999) and finding the difference between today's numbers and yesterday's numbers. Then multiplying each difference by a set number (i.e. 1, 2, 3, 5, 10, 20, or 25). These numbers may, from time to time change (i.e. the 32nd entered number may be multiplied by 3 for 2 months, then we might swap out a product and then need to multiply by 5, etc). At the end, I need all 56 differences multiplied by their individual respective multipliers totaled. This needs to be done daily using previous days numbers and be able to change the multiplier without effective previous data.
I was trying to to this myself by Column 1 = multipliers, Column 2 = yesterdays' numbers and Column 3 = today's numbers. The calcualtions are done by excel and a total is summed. This I can do. However, each day i'd need to make a new file and enter yesterday's and today's numbers. This is time consuming. I'd like a system where I can just entere today's numbers and any changes to the multiplier and it will spit out the total.
If anyone can guide me or point me in any direction to accomplish this automation. I would greatly appreciate it. I'm pretty computer savvy, but just have not had the time to dwell into Excel.
For those interested in what this is for: I have a small business that sells instant lottery tickets. Each day we have to figure out the number of tickets sold the previous day. We have a notebook and manually write down numbers, do the substractions by a calculator and total. The table in the notebook is seperated by ticket values (i.e. $1 tickets, $5 tickets, etc). However, certain tickets run out or occasionally we need to move tickets to a different spot, thus the MULTIPLIER in the automated system would need to change.
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May 6, 2009
1 35
2 37
3 39
4 22
5 25
6 27
7 28
8 23
9 25
I have the above table. What I want excel to do is to grab the largest number in each set of numbers from the second column and return the corresponding number in the first column. So basically, excel would return a 3, 7, and 9 in cells C1, C2, and C3.
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Jun 24, 2009
how would I go about pulling the three sets of numbers out of the following example:
Detected 2 resets. Imported 16 out of 22 bookmarks.
These sets of numbers could be single, double, or triple digits. I need to find the percentage from the second and third set of numbers in the long run.
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Dec 15, 2009
My spreadsheet is multiple rows and columns of sales data with two blank rows between salespeople. Ex:
$100 ABC Inc. John #101
$150 XYZ Inc. John #101
$200 Golf Inc. Sue #102
$150 BBall Inc. Sue #102
What I need is this:
$100 ABC Inc. John #101
$150 XYZ Inc. John #101
$250
$200 Golf Inc. Sue #102
$150 BBall Inc. Sue #102
$350
Where the sum of each salesperson's sales figures is shown and formatted. I've been doing this manually. I'm having difficulty figuring out how to do this using VBA. I can do the formatting, and conceptually I see what needs to be done.
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May 1, 2013
I have two sets of data:
Data set #1
Indicator PriceIndicator Price Date
2.1 10/27/08
2.11 10/22/08
2.17 11/21/08
2.38 03/20/09
2.38 03/25/09
2.46 03/19/09
2.5 03/09/09
2.5 03/24/09
2.53 12/04/08
2.73 12/09/08
2.82 12/24/08
2.83 12/18/08
2.89 12/12/08
2.9 03/13/09
Data set #2:
Close Price Close Price Date s1s2s3s4r1r2r3r4
2.25 12/11/09
2.30 12/12/09
2.40 12/13/09
2.00 12/14/09
2.12 12/15/09
2.50 12/16/09
2.51 12/17/09
2.53 12/18/09
2.49 12/19/09
What I'm attempting to do is find what are the CLOSEST four indicator prices in data set #1 are above (r1, r2, r3, r4) and below (s1, s2, s3, s4) the closing price in data set #2. Also, I can only use the indicator numbers in data set #1 that are on or before the close price date in data set #2. Because of this, not all of the r's and s's will be filled in.
I would like to use just regular excel formulas, but I have a feeling that VBA may be my only option.
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Jun 1, 2012
vb code that will break out each 6 digit media used in their own rows such as in the illustration below.
Sample data before macro
Master Backup
GTI - Hostname
[Code]....
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Dec 14, 2006
I have a list numbered 0 to 300. What I am looking for is a formula to randomly select 150 unique sets of two numbers and list them in separate columns for a competition draw and should appear as per the example below
HomeAway
7v96
11v4
146v25
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Mar 17, 2008
I am looking for a way to create a random order of numbers in a given range. For example, A1:a100 to be populated with a random number between 1 and 100, but not to duplicate, using every possible number within that range. I use the RANDBETWEEN function to generate the numbers, but I cannot prvent them from duplicating.
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Dec 25, 2012
I am seeking to analyse loading cycles on a beam.
I have half hourly data for five years, in two columns A: Date and B: Load in Kg. The load on the beam is not uniform over time and shows a cycle of load.
In Column C I have an AVERAGE function that returns the average load based in the 4 hour period (2 hours backward looking and 2 hours forward looking) if it is less than 50% of the maximum load.
The data in Column C returns sets of continuous vertical cells of data showing periods of low loading and empty cells where the load is greater than 50%. The sets can be as small as one cell (i.e. one hour) to a set of contiguous vertical cells for one week of low load.
My objective is to use Excel to analyse all the sets of contiguous cells in Column C to determine the time period from the first cell of each set to the last cell of that set and drop the result into another work sheet (pivot table) to further analyse these results.
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Dec 2, 2011
I have one shared book having different tabs from my team member.
in every tabs i got Dates written in various forms like,,,,2/12/2011, 12/2/2011, 12-2-2011 etc......
I want to get uniform date format from all the tabs at once.
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Sep 9, 2005
What do I need to do please to have a number in a row 1 to 40 as an example below
1,23,9,25,33,40 each row needs to be 1 to 40 but number no more than once
six rows deep yes the other rows can have the same numbers as above or below
=INDEX(ROW($A$1:$F$10),RANK($H1,$H$1:$H$60))
=RAND() copied H1:H60
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Apr 6, 2014
How can I use a macro on a button in SHEET 1 to generate random numbers on SHEET 2 as follows?
Cell A1: (1-10)
Cell A2: (1-6)
Cell A3: (1-100)
Cell A4: (1-12)
I've got it working with formulas, but every time I press "DELETE" the random numbers jump to new values.
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Aug 13, 2008
I have had some difficulty searching this on the web, but how would I generate a random number between 1 and n?
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Aug 7, 2013
I have a very large dataset (~5000 points in a 2D array) which I need to plot and fit a linear trendline to. There are 90 subjects each of which has a daily binary event checked over its lifespan. eg:
Day: 1 2 3 4 5 6 7 8 9 10
subj 1 0 1 0 0 0 (dead)
subj 2 1 1 1 0 1 0 1 0 0 0(dead)
subj 3 0 0 1 0(dead)
I simply averaged the number of events per day per subject and plotted them but near the long-lived end of the data the variability gets really high. I have normalized the lifespan for each subject such that instead of the event occurring on day 10, it occurred at 0.2 of its total lifespan (dying on day 50). Now that my data is in this format, I want to create an average for all subjects over the domain 0-1 representing birth-death.
The trouble is that now each subject's domain has different intervals between points (eg. 0.1 for subjects living 10 days and 0.006993 for those living 143 days). How to now space out the cells (somewhat) automatically so I can average the columns? My array is 90 x 150 so doing it manually is not really possible. Or, alternatively, is there a way to create a continuous average rather than a discrete one? Some sort of function that goes through each infinitely small (or even a discrete really tiny interval) point of the domain (0-1) and averages the binary y-value?
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