I have a SharePoint list as a datasource in Power Query.
It has a "AttachmentFiles" column, that is a table, in that table i want the values from the column "ServerRelativeURL".
I want to split that column so each value in "ServerRelativeURL"gets its own column.
I can get the values if i use the expand table function, but it will split it into multiple rows, I want to keep it in one row.
I only want one row per unique ID.
Example:
I can live with a fixed number of columns as there are usually no more than 3 attachments per ID.
I'm thinking that I can add a custom column that refers to "AttachmentFiles ServerRelativeURL Value(1)" but I don't know how.
Can anybody help?
Try this code:
let
fn = (x)=> {x, #table({"ServerRelativeUrl"},List.FirstN(List.Zip({{"a".."z"}}), x*2))},
Source = #table({"id", "AttachmentFiles"},{fn(2),fn(3),fn(1)}),
replace = Table.ReplaceValue(Source,0,0,(a,b,c)=>a[ServerRelativeUrl],{"AttachmentFiles"}),
cols = List.Transform({1..List.Max(List.Transform(replace[AttachmentFiles], List.Count))}, each "url"&Text.From(_)),
split = Table.SplitColumn(replace, "AttachmentFiles", (x)=>List.Transform({0..List.Count(x)-1}, each x{_}), cols)
in
split
I manged to solve it myself.
I added 3 custom columns like this
CustomColumn1: [AttachmentFiles]{0}
CustomColumn2: [AttachmentFiles]{1}
CustomColumn3: [AttachmentFiles]{2}
And expanded them with only the "ServerRelativeURL" selected.
It would be nice to have a dynamic solution. But this will work fine for now.
Related
I am facing an issue where I need to compare column X and column Y, if X=Y then I want to delete that row. But if X≠Y then just leave it there as I need to correct it manually. I try to find any reference but to no avail.
Example of Table
I try using PowerQuery, because the name list were scattered, after sorting up to X=Y, there are some data that wasnt right because it is comparing to almost identical name. I try to use 'remove duplicate' but nothing happened as it only remove if the column has the same data in multiple row.
Thanks in advance.
For another method that does not involve a helper column, you can use the Table.SelectRows function of Power Query:
let
//sample data
Source = Table.FromRecords(
{[x="Johnny White", y="Johnny White"],
[x= "Black Mmamba", y= "Black Mamba"],
[x="Tom Evans", y="Tom Evans"],
[x="Britney Blue",y="Britney Blue"],
[x="White Kingdom", y="Wine Kingdom"],
[x="Daniel Zack", y="Daniel Zack"]},
type table[x=Text.Type,y=Text.Type]),
//select rows where data not the same in each column
remDupes = Table.SelectRows(Source, each [x] <> [y])
in
remDupes
Source
Dupes Removed
I have three numeric fields named A,B,C and wants them in a single filter in tableau and based on the one selected in that filter a line chart will be shown. For e.g. in filter Stages B column is selected and line chart of B is shown. Had it been column A selected then line chart of A would be displayed .
Pardon my way of asking question by showing a image. I just picked up learning tableau and not getting this trick any where.
Here is the snapshot of data
Create a (list) parameter named 'ABC'. With the values
A
B
C
Then create a calculated field
IF ABC = 'A' THEN [column_a]
ELSEIF ABC = 'B' THEN [column_b]
ELSEIF ABC = 'C' THEN [column_c]
END
Something like that should work for you. Check out Tableau training here. It's free, but you have to sign up for an account.
Another way without creating a calculated field. Just pivot the three columns to rows and your field on which you can apply filter is created. Let me show you
This is screenshot of input data
I converted three cols to pivots to get data reshaped like this
After renaming pivoted-fields column to Stages I can add directly this one to view and get my desired result.
I would like to grab the first rows of all CSV files in a folder. I have read that power query would probably be best.
I have gone to Excel > Data > Get Data > From Folder > OK. That has brought me to a table of all the csvs in the folder. I would like to grab the first row of all of these files. I do not want to import all rows of the tables because it was way too many rows. It is also too many tables to do one by one. Please tell me what I should do next. Thank you!
First image is where I am, Second image is where I would like to be
The approach below should give you a single table, wherein each column contains a given CSV's first row's values. It's not exactly what you've shown in your second image (namely, there are no blank columns in between each column of values), but it might still be okay for you.
You can parse a CSV with Csv.Document function (which should give you a table).
You can get the first row of the table (from the previous step) using:
Table.First and Record.FieldValues
or Table.PromoteHeaders and Table.ColumnNames
(It would make sense to create a custom function to do above the steps for you and then invoke the function for each CSV. See GetFirstRowOfCsv in code below.)
The function above returns a list (containing the CSV's first row's values). Calling the function for all your CSVs should give you a list of lists, which you can then combine into a single table with Table.FromColumns.
Overall, starting from the Folder.Files call, the code looks like:
let
filesInFolder = Folder.Files("C:\Users\"),
GetFirstRowOfCsv = (someFile as binary) as list =>
let
csv = Csv.Document(someFile, [Delimiter=",", Encoding=65001, QuoteStyle=QuoteStyle.Csv]),
promoted = Table.PromoteHeaders(csv, [PromoteAllScalars=true]),
firstRow = Table.ColumnNames(promoted)
in firstRow,
firstRowExtracted = Table.AddColumn(filesInFolder, "firstRowExtracted", each GetFirstRowOfCsv([Content]), type list),
combined =
let
columns = firstRowExtracted[firstRowExtracted],
headers = List.Transform(firstRowExtracted[Name], each Text.BeforeDelimiter(_, ".csv")),
toTable = Table.FromColumns(columns, headers)
in toTable
in
combined
which gives me:
The null values are because there were more values in the first row of my ActionLinkTemplate.csv than the first rows of the other CSVs.
You will need to change the folder path in the above code to whatever it is on your machine.
In the GUI, you can select the top N row(s) where you choose N. Then you can expand all remaining rows.
I have a data set stored in an excel file, when i importing data using matlab function :
A=xlread(xls -filename)
matrix A only stored numeric values of my table.. and when i used another function such as:
B= readtable(xls-filename)
then table will view complete data include rows and columns headers but when i apply such operation on it like
Bnorm=normc(B)
its unable to perform normalization on it due to the rows and columns headers ..
my question are:
is there any way to avoid rows and columns header in table B.
is there any way to store rows and columns headers when read table using xlread function .. such that
column header = store first row in (xls-filename)
row headers = store first column in (xls-filename)
thanks for any suggestion
dataset table
normalized matrix when apply xlread(xls-filename
The answers to your specific questions are:
With a table, you can avoid row labels but column labels always exist.
As per the doc for xlsread, the first output is the numeric data, and the second output is the text data, which in this case would include your header information.
But, in this case, you just need to learn how to work with tables properly. You want something like,
>> Bnorm = normc(B{:,2:end});
which extracts all the numeric elements of table B and uses them as input to normc.
If you want the result to be a table then use
Bnorm = B;
Bnorm{:,2:end} = normc(B{:,2:end}));
I am using power query in excel and i used create custom column to create a new column, what i desperately need is for this new column to take the value from the second row and subtract it from the first row , and again this will need to happen for all rows like so: row two is subtracted from row one, and row three will be subtracted from row two and row four will be subtracted from row three. PLEASE help. I have no understanding of dax nor power query started using it today and i only need this one thing to work
PS. I have an index that starts from one, called index
here is the code
= Table.AddColumn(#"Reordered Columns", "Custom", each [#"ODO - Km"] - [#"ODO - Km"])
At this moment the ODO km is subtracting from the ODO km in the same row, I want the previous odo km to subtract from the next ODO km.
Create two indexes, one 0-based, called Index0, and one 1-based, called Index1. Merge the query with itself joining on Index1 = Index0. You'll now have duplicate of every column, but they will be offset by one. Then you can do all of your arithmetic in one row. After this, you can remove all but the result fields you want.
You don't need to do this. You can index rows in a table by using an index. The key is to reference the name of the previous step like below:
let
Source = whatever
addindex = Table.AddIndexColumn(Source , "Index", 0, 1),
addRelative = Table.AddColumn(addindex, "Previous record", each try if [Index]<>0 then addindex[myField]{[Index]-1}),
in
addRelative