VBA Array Basics
May 14, 2009
Lets say I have this....
PHP
Dim B as Rangeset B = activesheet.range("A1:C3")Dim a(3) As Doublea(1)= 1.2a(2)= 3.6a(3)= .27
B is a 3x3 Matrix of values in your sheet
How would I perform matrix multiplication of B * array "a"?
My main problem is with how to reference then entire array "a" and how the data is being stored (is the array a 3x1 or a 1x3). And if there is a VBA MMULT command or if building my own or using the worksheet one are my only options.
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Jul 13, 2007
I have been looking into refining the way a couple of big macros that I wrote several years ago work and have decided that instead of loads of inputboxes that a Userform might be the way to go. I have never used them, don't know how to link code to the objects to make them work and can on make a guess as to the right way to start going about this. Need sort of Userforms for Dummies site where I could pick up the basics? I am going looking toward having a box come up where the user can enter about 8 pieces of data and based on that data the macro will then go off and open specific files anc change specific data.
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Oct 2, 2009
I want to do apparently simple thing but somehow it never works...I must be highlighting wrong or doing something out of order etc.
I have a pivot table. Imagine it showing Dept date anc charge...like this:
Dept Date Charge
51 1/1/09 20.00
1/2/09 10.00
2/26/09 10.00
3/6/09 20.00
55 1/1/09 20.00
1/2/09 10.00
2/26/09 10.00
3/6/09 20.00
etc etc I HOPE I DID NOT LOOSE THE FORMATTING!
Anyway I want the first line (the one that shows the dept) BOLDED. I thought I could do dhtis with conditional formatting, applying it the sheett all at once by saying if the value in row A > 0 then bold the line..........but I am not doing right...
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Aug 12, 2014
I have an excel sheet that have a large set of datas. In these datas in one column most of the datas are indicated as green but some of them are red. I can pick the red ones by using filter option but I also wanted to show the red cell values in one cell. For example, Cell1;Cell2;Cell3 like this (the ; should be between them). I try to use macros but that is not the program that I have full knowledge about it. S
( Like this
IF
A(i)= red
Then
B(i)=A(i)
end if
)
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Mar 27, 2008
I have 2 spreadsheets: in a Sheet1 I keep some values and in a Sheet2 5 names of users with special rights (range A1:A5). I want to have sure that anybody will change/delete that names without password. Only the user "Administrator" can do that(I check the name of the user using "Application.UserName"). Additional question: is it possible to still protect those cells if somebody turn off macros during opening file?
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May 3, 2008
i have been working on editting a game that i got off the internet and i was having trouble editing the buttons on the worksheet. they dont seem to be linked to a macro and i cant edit them or even delete them
it seems like they are forms but attached to the worksheet.
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Sep 23, 2009
I am trying to create a user form to edit some named ranges. The VBA user form designer is basically the same as Borland Delphi, so building the form itself was easy. What I can't figure out is how to populate the user form with the data from the spreadsheet.
I have a number of text boxes on the form with names like txtTier1Slots, txtTier1Ceiling, txtTier1Floor, etc up to 4.
I have a defined name that corresponds with each item, Tier1Slots, Tier1Ceiling, Tier1Floor, and so on. I'm using defined names because they're referenced in Conditional Formatting on one of the worksheets in my project. They don't exist as actual cells, just name references.
I want to get the form populated with those values. I've tried about twenty variations of the following code, using ThisWorkbook, Workbooks, Cells, Range, Name, and just about every cell reference method I can think of. I've so many different error messages, my head is spinning.
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Sep 24, 2009
User Form Basics - Populating Text Boxes. A few tweaks later and its reading the data just fine. Some of the specific form objects and range names have changed, but it's the same logic.
Anyway, this isn't just for display. I need to export the data back to the spreadsheet. So, I plugged this line into the event handler for the "Save & Exit" button on the sample form in the other thread:
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Jul 30, 2012
in C a string is nothing more than an Array of characters ending with a null character.
in VBA this does not seem to be the case.I am trying to use the BlowFish code from David Midkiff for some encryption, however the code sometimes fails:
When encrypting a string a string of a specific length should be returned. however sometimes one of the characters of the encrypted string is a null character, and the returned encrypted string (with a embedded null character) is causing me problems. I want to check for the null character and if present redo the encryption. But how do I check for the presence of this null character in a unicode (double-byte) string?
Checking with Len(encrypted) gives the correct length (!) but trying to move each (unicode)character into an array fails when using the Mid() function past the null character in the string.
Now I can use
byteArray() = StrConv(unicodetext,vbFromUnicode)
to get the lower byte of each character into an array easily, but how do I do this for both bytes of the unicode characters?
Using an integer array does not work other than through
intArray(j) = CInt(AscW(Mid(Outp, j, 1)))
which fails on the nullstring in my encrypted text.
I have tried with variants but so far no luck. I thought if the string was entered into a variant then I could also address the variant as an array of bytes, but that does not seem to be accepted by VBA.
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Sep 9, 2012
I am trying to populate many arrays with the same code using something like this. For this test, assume the following data in A1.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Code:
Sub populate()
Dim firstArr(5), secondArr(5), thirdArr(5), fourthArr(5), fifthArr(5) As Integer
Dim r, c, num As Integer
[Code]....
The above code does not work of course and falls over. I am unsure whether I should try and concatenate with something like this eg "" & arrName(i) = Cells (r,c) or go down a different route.
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Dec 20, 2013
I need to export this to Xcelsius which doesn't support any macros/vba. Btw I can;'t use Row() in xcelsius too.
[Code].....
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Oct 2, 2008
I have a class module with several private variables, including one that is an array of a user-defined type. I am trying to set the values of a single element of this array with "Property Let ..." from a string array:
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Apr 7, 2009
Say I have 3 columns of data: A1:C10 and I want to run a Match() function on them all together to see if I get a match any one those cells, say the value of have in X1.
Since, Match only allows a One-Column lookup array.. is there a way to "concatenate" or "append" the 3 columns together within a formula so now I would be looking to Match in an array that is 1 column * 30 rows?
Basically want to convert =Match(X1,A1:C10,0) to =Match(X1,A1:A30,0) without moving around the raw data in the sheet.
And I want to avoid doing an AND or OR formula that uses 3 separate MATCH() for each column.
I have a hunch that the MMULT or MMULT/TRANSPOSE functions are involved, but can't seem to get it right.
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May 2, 2013
I'm only starting to get to grips with arrays. I have what I consider to be a lot of data that I need to 'cut' into separate workbooks. I have written some code that does this by simply looping through each line, 250k+, checking against a variable and copying the row into a separate sheet. This took longer than it would have doing it manually. It was suggested to me that I use arrays to speed up the process. I have managed to store the test data into an array but am struggling to find a way to loop through and pull out an entire 'row' from the array based on a variable. I have looked for 2 days in various places to find some way to loop through the data held in the array, but to no avail.
That code will appear here from about 8am GMT tomorrow. I know that once I've cracked this I'm on the road to some very significant time saving and comprehensive report writing.
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Aug 5, 2014
I want to pass an array to Offset in the "Height" parameter, without having to type the array.
{=MAX(SUBTOTAL(9,(OFFSET(A1,ROW(1:5),,{1,2,3,4,5}))))}
I can't seem to figure out how to build the {1,2,3,4,5}. I've tried another ROW(1:5) and have tried nesting that like N(ROW(1:5)) but nothing works.
How I can get the {1,2,3,4,5} without having to type it out (so that I can expand this to a larger list)??
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Aug 26, 2009
I am trying to filter an array (the longer one) using the shorter array as the criteria. I am currently doing this using the following method
IF(LOOKUP(lookup cell, array)=lookupcell, lookupcell, "FALSE")
I then copy and paste 'values' and filter out the 'false' to get my final result.
This has worked in the past, but for some reason that I simply can't figure out, the formula isnt working! I've attached the example, and I've highlighted a number in blue (cell E522 and C103), (that should be being found in the 'LOOKUP' function) but is returning a "FALSE". I have looked over the code and simply can't figure out why Excel isn't returning the right value.
This is obviously happening for a quite a few of my numbers, as my filter result is returning an array that is about 1500 shorter than it should be. I have highlighted E522 as the 'example cell' to look at.
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Jun 21, 2014
wondering is there a VBA equivalent of --() in excel that turns trues and falses to 1's and 0's?
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Nov 6, 2013
Is there anyway to recreate this formula w/o it being an array ?
{=IF(C3="","",IFERROR(INDEX('Master List'!$B$1:$B$2000,MATCH(TRUE,ISNUMBER(SEARCH('Master List'!$A$1:$A$2000,C3)),0)),"ADD TO MASTER"))}
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Nov 15, 2007
=CORREL(C1:C10,C12:C21) at H1
=CORREL(C1:C10,C23:C32) at H2
=CORREL(C1:C10,C34:C43) at H3
etc
can i have a macro that first array remain the same, and second array always 11 cells added. drag it down also can
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Mar 22, 2007
I've tried to multiply each element in a 6x6 array by a similar 6x6 array, both on the same sheet, and it worked.(see Macro2 and attached xls file "Test").Then I got more ambitious and tried to do the multiplication from a standard array in sheet "TestA", with the result on the same sheet, by each array in sheet "TestB" and failed.How do I solve this problem? Pgualb PS:I'm using the R1C1 style.
Sub Macro2()
For y = 29 To 34
For x = 2 To 7
Cells(x, y) = Cells(x, y - 27) * Cells(x, y - 18)
Next x
Next y
End Sub
Sub Teste12()
'Multiplica matriz em TestB por matriz padrão em TestA com _
'resultado na matriz em TestA correspondente à matriz em TestB
'
Dim x, y As Integer
For y = 2 To 7.............
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Aug 15, 2014
Assume that I have in Sheet2 a list of CUSTOMIZED name.
[Code].....
Now in Sheet1, I have data in column A that has strings consist of the customized name.
For example
[Code] .....
What function should I use that could give me the result of the CUSTOMIZED name?
I was thinking of a formula i.e.
[Code] ......
Obviously, the above formula give me error. Even if it works, it'll not give me the customized name ...
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Nov 28, 2011
I'm new to arrays. They seem promising for what I want to do though...
Heres where I'm at. I have some data like this:
items freq 1 0.5 2 0.5 3 0.5 4 0.25 5 0.25 6 0.125
Now, I've created a 2 dimensional array, as such:
Code:
Sub testarray()
Dim arr1 As Variant
Dim rng1 As Range
Dim lngX As Long
Set rng1 = [A2:A6]
ReDim arr1(1 To rng1.Count, 1 To 2)
For lngX = 1 To rng1.Count
arr1(lngX, 1) = rng1.Cells(lngX, 1)
arr1(lngX, 2) = rng1.Cells(lngX, 2)
Next
End Sub
Now, what I need to do, is create an array for each freq of all the items that share that freq. Essentially I need this:
0.5 {1,2,3} 0.25 {4,5} 0.125 {6}
Now, I was thinking, if I could create a dictionary object and make the key the freq (so my keys would be 0.5,0.25,0.125) then I could assing the "item" an array (or another dictionary) holding the items that apply to that freq.
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May 18, 2007
I just wanted to concatenate a few cells using an array formula like this:
{=SUM(IF(B2:J2="";0;B2:J2))}
Well, this does not work. I have no idea why it fails. Any solution to this without scripting?
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Jun 30, 2006
i need to replicate what i did using array formulas with VBA macro (array variable). to make things clear and simple i created an example for illustration only. look at it & u will find what i did & what i need to do ,much of it
in writing so that i accurately describe my problem. attached is my example
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Jul 11, 2007
On one sheet (KPI) I have either the values "x" or "" in the range A84:A89 to mark wheter to use the corresponding project in the range B84:B89. On the sheet X-ref I have the same project names in range T4:Y4 and a corresponding target value in T8:Y8
What I want is the sum (or average) of the marked-projects target-values. The result should end up in KPI!G31.
In other words I want
=sumif(A84:A89;"x";'X-ref'!T4:Y4)
but it doesn't work since the first range is an column-array and the second range is an row-array.
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Feb 11, 2008
I'm trying to use an array to carry out string function on a range of excel cells.
Here is the code I am using
Dim arrXl As Variant
arrXl = ws.Range("F1:F" & ws.Range("D1").End(xlDown).Row)
For i = LBound(arrXl) To UBound(arrXl)
MsgBox (LBound(arrXl))
'If 1st char is different from 3rd char then remove all of string after 1st char
If Left(arrXl(i), 1) <> Mid(arrXl(i), 3, 1) Then
arrXl(i) = Left(arrXl(i), 1)
End If
'If 1st char is different from 7th char then delete string after 5th char
If Left(arrXl(i), 1) <> Mid(arrXl(i), 7, 1) Then
arrXl(i) = Left(arrXl(i), 5)
End If
The lbound function returns the value of 1 as the lower bound, I do not have "Option base 1" set so I was expecting the lbound value to be 0. The first 2 cells in the F column are blank so this may have something to do with it, I am unsure if cells in excel can be null if they can be null one cell may be null and the other may be a zero length string but I am unsure about this.
The ubound function returns a value of 487.
The code breaks when I try to access an element in the array so it breaks on the line:
If Left(arrXl(i), 1) <> Mid(arrXl(i), 3, 1) Then
and returns the "Subscript out of range" error message.
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Aug 6, 2009
I need to multiply an array of logical results ( returned as {1,0,0,0,1,0 et.}) with a text array (a reference column) and return the text in the reference column in case the value in the logical array is 1.
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Mar 31, 2014
I am trying to do a sort of index match thing using VBA. What I am attempting to do is to use the prefix of a long number and try to find that exact prefix in a string array, and output that string array value. So this is what I have so far as a test:
[Code].....
So I can match the text exactly so if I put PREFIXB in cell A1 in this example, i will get the msg box saying "YES", but if I make it PREFIXB1231k4j3jj1kj32cj, it will display "NO". I want to get it so that PREFIXB will be displayed in the cell that I put the formula in. So if A1 = "PREFIX1AAA100CF" and cell B1 = "=ABC(A1)", cell B1 will display "PREFIX1AAA".
Now the thing is that these prefixes can have different lengths, but will never encompass the exact prefix of another. So if I had a prefix of: PRE1AB, I won't have a prefix of PRE1A.
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Aug 25, 2006
I am trying to copy or edit a cell thats has the following formula (see below), I keep getting this message "You cannot change part of an Array!"
=If(ROW($A2:$A8)-ROW(A2)+1>COUNT(W2:W8),"",INDEX($A:$A,SMALL(W2:W8,ROW(INDIRECT("1:"&ROWS(A2:A8))))))
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Aug 17, 2009
Can I redim an array that is held within an array? I have (for example) 3 worksheets, and from each one I want to load 2 columns into an array. However I also want (I think) those 3 arrays to be contained within one array so that I can step through them easily. The code below will not run, but might better show what I am wanting;
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