Excel vba array function multidimensional

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Excel vba array function multidimensional

VBA Two-Dimensional Array in Excel. Two Dimensional Array ahs two dimensions and uses 2 Indexes. The two indexes are separated with comma symbol. For example one index represents the rows and other represnts the columns. The 2Dimensional array also called as rectangular array. We refer Excel worksheet or table for 2Dimensional arrays. Syntax of the 2Dimensional Array Function Here is the Syntax of the 2Dimensional Array Function in Excel VBA. Dim ArrayName(FirstIndexNumber,SecondIndexNumber) As DataType where FirstIndexNumber and SecondIndexNumber: These are mandatory argumnts. It represents the index or subscript value. and DataType: It represnts the type of an array variables. Static 2Dimensional Array VBA Example in Excel Let us see the example VBA macro code on static 2Dimensional Array in Excel. 'VBA Static 2Dimensional Array Sub VBA_Static_Two_Dimensional_Array() 'Declare Variable Dim aType(1, 1) Dim iRow As Integer, iCol As Integer 'Loop through rows For iRow = 0 To UBound(aType, 1) 'Loop through columns For iCol = 0 To UBound(aType, 2) aType(iRow, iCol) = ThisWorkbook.Sheets("Sheet4").Cells(iRow + 1, iCol + 1) 'Check output in immediate window Debug.Print aType(iRow, iCol) Next Next End Sub Here is the output screenshot of above and below macro. Dynamic 2Dimensional Array VBA Example in Excel Let us see the example VBA macro code on dynamic 2Dimensional Array in Excel. 'VBA Dynamic 2Dimensional Array Sub VBA_Dynamic_Two_Dimensional_Array() 'Declare Variable Dim aType() Dim iRow As Integer, iCol As Integer 'Initialize an array size ReDim aType(1, 1) 'Loop through rows For iRow = 0 To UBound(aType, 1) 'Loop through columns For iCol = 0 To UBound(aType, 2) aType(iRow, iCol) = ThisWorkbook.Sheets("Sheet4").Cells(iRow + 1, iCol + 1) 'Check output in immediate window Debug.Print aType(iRow, iCol) Next Next End Sub Instructions to use Macro Here are the instructions to use above macro in Visual basic editor. Open Visual Basic Editor(VBE) by clicking Alt +F11 Go to code window by clicking F7 Copy above specified macro or procedure Paste above copied code in code window Run macro by clicking F5 or Run command You can see output on the screen Find above specified output screenshot. Other Related VBA Arrays articles You may also like the related VBA Array articles. Back to VBA Arrays Home VBA Arrays VBA Multi-Dimensional Array Create a Multi-Dimensional Array in VBA To create a multiple dimensional array, you need to define the dimensions while declaring the array. Well, you can define as many as dimensions that you need (VBA allows 60 dimensions) but you will probably not need to use more than 2 or 3 dimensions of any of the arrays. Using a two-dimensional array is like having rows and columns. In this tutorial, we will look at how to create a 2-D and 3-D array. Create a Multi-Dimensional Array in VBA Use the Dim statement to declare the array with the name that you want to give. After that, enter a starting parenthesis and define the element count for the first dimension. Next, type a comma and enter a count of elements that you want to have in the second dimension, and close the parentheses. In the end, define the data type for the array as a variant or any data type you want. Here's the code. Sub vba_multi_dimensional_array() Dim myArray(5, 2) As Variant myArray(1, 1) = 1 myArray(2, 1) = 2 myArray(3, 1) = 3 myArray(4, 1) = 4 myArray(5, 1) = 5 myArray(1, 2) = 6 myArray(2, 2) = 7 myArray(3, 2) = 8 myArray(4, 2) = 9 myArray(5, 2) = 10 End Sub The above code for the array creates an array with 5 rows and 2 column and will look something like this. More on VBA Arrays VBA Add New Value to the Array | VBA Clear Array | VBA Loop Through an Array | VBA Range to an Array | VBA Search for a Value in an Array | VBA Sort Array | VBA Array Length (Size) | VBA Array with Strings | VBA Dynamic Array | ISARRAY Function | ARRAY Function | VBA Arrays The arrays in our last lesson were all one dimensional arrays. It's one dimensional because there's only one column of items. But you can have arrays with more than one dimension. In theory you could have an array with up to 60 dimensions, in Excel VBA. However, you'll be glad to know that it's a rare program that uses more than 3 dimensions, or even 2 dimensions. To set up an array with more than one dimension, you simply add a comma after the first number between the round brackets of your array name, then add another number. Like this: Dim MyArray(5, 4) As Integer Or like this: Dim MyArray(1 To 5, 1 To 6) As Integer In the second declaration above, we've specified that the array positions should start at 1 rather than the default 0. The arrays above are both 2-D arrays. If you want to add another dimension, just add another comma and another number: Dim MyArray(5, 4, 6) As Integer Dim MyArray(1 To 5, 1 To 4, 1 To 6) As Integer In this next exercise, we'll set up a 2-D array. We'll then print out arrays values in cells on the spreadsheet. Create a new Sub and call it ArrayExercise_3. (You can use your spreadsheet from the previous lesson, if you like.) As the first line of code, add this line: Dim MyArray(2, 3) As Integer This sets up a 2-D array. Think of this like the rows and columns on your spreadsheet. The 2 means 3 rows (0 to 2, remember). The 3 means 4 columns. To store data in the first row, add these lines: MyArray(0, 0) = 10 MyArray(0, 1) = 10 MyArray(0, 2) = 10 MyArray(0, 3) = 10 This means row 0 column 0 has a value of 10, row 0 column 1 has a value of 10, row 0 column 2 has a value of 10, and row 0 column 3 has a value of 10. Of course, there is no row or column 0 on a spreadsheet, and you'll see how we solve that in the loop. For now, add values for the other positions in the 2-D arrays: MyArray(1, 0) = 20 MyArray(1, 1) = 20 MyArray(1, 2) = 20 MyArray(1, 3) = 20 MyArray(2, 0) = 30 MyArray(2, 1) = 30 MyArray(2, 2) = 30 MyArray(2, 3) = 30 The new lines add values to the rest of the positions in the array. To go through all positions in a 2-D you need a double loop. A double loop means one loop inside another. The outer loop takes care of the rows while the inner loop takes care of the columns. (The rows are the first positions between the round brackets of MyArray, while the column are the second positions between the round brackets of MyArray) For the loop, the outer loop, add this: For i = 0 To 2 Next i You now need the inner loop, in bold below: For i = 0 To 2 For j = 0 To 3 Next j Next i The variable for the inner loop is j rather than i. But they are just variable names, so we could have called them almost anything we liked. Notice, too, that the outer loop goes from 0 to 2 while the inner loop goes from 0 to 3. These equate to the numbers between round the brackets of MyArray when we set it up. The code for the loop is this, but it needs to go between the For and Next of the inner loop: Cells(i + 1, j + 1).Value = MyArray(i, j) This is quite complex, so we'll go through it. Take a look at the Cells part: Cells(i + 1, j + 1) Because our arrays is set up to start at 0 we need to add 1 to i and j. If we didn't, then the first time round the loop the values would be these: Cells(0, 0) This would produce an error as there is no row 0, column 0 in an Excel spreadsheet. In case you're wondering why the first time round the loop would produce values of 0, 0 for Cells, here's an explanation. The first line in the outer loop is another loop. This means that the entire inner loop will execute from 0 to 3. VBA will then drop to the Next i line. The next i after 0 is 1. The end condition for the outer loop, however, is 2, so we're not done with the outer loop yet. So again it drops down to execute its code. Its code just happens to be the inner loop, so it executes the whole of this inner loop again. In other words, the outer loop is going round and round from 0 to 2 times. As it's going round and round, it just so happens that it will run the inner loop 0 to 3 times. The first time round, the values in the inner loop will be: 0, 0 0, 1 0, 2 0, 3 The second time round the inner loop, values for i and j will be: 1, 0 1, 1 1, 2 1, 3 The third time it will be: 2, 0 2, 1 2, 2 2, 3 So the first number, which is i, goes up by 1 each time. These are the rows. The second number, j, will always be 0, 1, 2 and then 3 (the columns). Notice that after the equal sign of the Cells line, we have this: = MyArray(i, j) The i and j between the round brackets of MyArray will be the same as the numbers above. But the whole of your code should look like this: Run the code and see what happens. Switch back to your spreadsheet and you should see this: Multidimensional arrays and double loops can be very tricky to understand, so don't worry if hasn't all sunk in yet. Go over it a few times and you'll get there. In the next lesson, we'll take a look at the Split function and how it relates to arrays. The Excel VBA Split Function>

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