Forum Discussion
Reorganised a long format table to a wide data table
Hi, I'm struggling to reorganise a data table from long format to a wide format. my data is organised as follows: Value Sample 3456434 1 56645677 1 46356 1 24556 2 235478 2...
Since you said "hundreds of thousands", I recommend you don't use formulas for this, but instead use Power Query.
Select any cell in your data and use Data>Get & Transform Data>From Table/Range
This will open the Power Query Editor.
Now, use Add Column>General>Custom Column and use this formula:
"Sample " & Number.ToText([Sample])
Call the new column ColumnHeader (not essential, you can call it whatever you want).
Now right-click the Sample column and select Remove.
Next, select the ColumnHeader column you created above and use Home>Transform>Group By and configure the dialog like this:
Now use Add Column>General>Custom Column with this formula:
Table.AddIndexColumn([GroupIndex], "Index", 1, 1)
I called this new custom column DataWithGroupIndex.
Now I have three columns:
Right-click GroupIndex and Remove that column, then click the double-arrow in the top right hand corner of the DataWithGroupIndex column to expand the data that currently says "Table".
In the expand field dialog, I've configured it like this:
I know this seems like a lot of steps, but once done, this process will be repeatable and you won't be sat waiting for 7 hundreds of thousands of formulas to recalculate.
The point of the steps leading up to here was to get an index column that repeats when the column header changes, which will be important for the next step.
Now select the ColumnHeader column and use Transform>Any Column>Pivot Column and configure it like this:
After clicking OK, you'll see that the data are properly top-loaded into each Sample column.
You can right-click the Index and Remove it, then use Home>Close & Load to put the results back into the workbook.
If you want, you can just open the attached workbook, select any cell in the green table, go to the Query Tab, select Edit, then on the Home Tab of the Power Query Editor, click Advanced Editor to see the code for the whole query, which you should be able to put into your own workbook with some minimal editing if you're comfortable with that.
Hi OwenPrice ,
Thanks, this appears to be the best solution. How do you return the workbook to a normal worksheet after this? The power query editor doesn't appear to allow independent sorting of columns.
Many thanks
You can insert a step to sort the data before it's transformed to ensure it's sorted in the output.
Just sort the value column either ascending or descending in this position in the query:
The result is now:
I've attached the workbook containing the query that includes the sort step described.
In answer to your question, make sure you've used Home>Close & Load to put the results into the workbook. Then select any cell and use Table Design>Tools>Convert to Range.
Added sorting to my variant
let Source = Excel.CurrentWorkbook(){[Name="Range"]}[Content], #"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars=true]), #"Grouped Rows" = Table.Group(#"Promoted Headers", {"Sample"}, {{"Count", each List.Sort(_[Value ])}}), Custom1 = Table.FromColumns(#"Grouped Rows"[Count], List.Transform(#"Grouped Rows"[Sample], each "Sample " & Text.From(_))) in Custom1- Do you want to sort each column with the largest value at the top?
