How to convert a table in a matrix in KNIME? - matrix

Is it possible and if so, how to convert a table to a matrix?
My output table is structured as follows:
rowid user item value
0 x A 10
1 x B 15
2 x C 0
3 y A 12
4 y B 17
5 y C 25
My goal is to create a matrix in the following form:
rowid A B C
x 10 15 0
y 12 17 25

Use a Pivoting node with the following settings:
Group column(s) user
Pivot column(s) item
Manual Aggregation > Column value
Advanced Settings > Column name: Pivot name
You can leave the Aggregation set to First.
Connect the Pivot table output to a RowID node with settings:
Replace RowID with… checked
New RowID column user
Remove selected column checked

Related

Show number of distinct values in a grouped row in a matrix visual in Power BI

I have a matrix visual in PowerBI with two row fields, rf1 and rf2. This goups row field 2 (rf2) by row field 1 (rf1) such that each value in rf1 contains multiple values from rf2. rf1 and rf2 are stored in different tables in the data model, but the tables are connected directly.
I would like to show on the matrix visual the number of unique rf2 values within each rf1 against the corresponding row.
For example (first two colums as collapsable groups as in the matrix visual):
rf1
rf2
rf2 count
Values
group1
3
10
a
3
b
1
c
6
group2
2
5
a
2
d
3
Tot
--------------
5
15
What measure do I need to be able to generate this view?

Multiple sorting conditions in DolphinDB

Suppose I have a table as follows:
id=`A`B`A`B`B`B`A
item= 10 1 1 3 5 10 6
t=table(id,item)
id item
-- ----
A 10
B 1
A 1
B 3
B 5
B 10
A 6
For example, I want to sort the table with two conditions: first, by the most commonly occurring item in column item, then by the highest number in column item.
How can I sort like this:
id item
--- ----
A 10
B 10
A 1
B 1
A 6
B 5
B 3
Is there any way to go about this? Thanks!
Try this:
t1=table(id,item);
update t1 set count=count(item) context by item;
select * from t1 order by count desc, item desc;

Filter Google Sheets' pivot table by comparison with column

I want to filter a pivot table in the following set up:
My Table:
Key Value1 Value2
1 23 a
2 33 b
3 1 c
4 5 d
My pivot table (simplified):
Key SUM of Value1 COUNTA of Value2
1 23 1
2 33 1
3 1 1
4 5 1
Grand Total 62 4
I now want to filter the pivot table by the values in this list:
Keys
1
2
4
So the resulting pivot table should look like this:
Key SUM of Value1 COUNTA of Value2
1 23 1
2 33 1
4 5 1
Grand Total 61 3
I thought this should be possible by using a custom formula in the pivot filter but it seems I have no way of using the current cell in the pivot e.g. to make a lookup.
I created a simple example of this setup here: https://docs.google.com/spreadsheets/d/1GlQDYtW8v8ri5L68RhryTZxwTikV_NXZQlccSI6_7pU/edit?usp=sharing
paste this formula in Filters!B1:
=ARRAYFORMULA(IFERROR(VLOOKUP(A1:A, Table!A1:C, {2,3}, 0), ))
and create a resulting pivot table from there:
demo spreadsheet

SAS grouping algorithm

I have the following mock up table
#n a b group
1 1 1 1
2 1 2 1
3 2 2 1
4 2 3 1
5 3 4 2
6 3 5 2
7 4 5 2
I am using SAS for this problem. In column group, the rows that are interconnected through a and b are grouped. I will try to explain why these rows are in the same group
row 1 to 2 are in group 2 since they both have a = 1
row 3 is in group 2 since b = 2 in row 2 and 3 and row 2 is in group 1
row 3 and 4 are in group 1 since a = 2 in both rows and row 3 is in group 1
The overall logic is that if a row x contains the same value of a or b as row y, row x also belongs to the same group as y is a part of.
Following the same logic, row 5,6 and 7 are in group 2.
Is there any way to make an algorithm to find these groups?
Case I:
Grouping defined as to be item linkage within contiguous rows.
Use the LAG function to examine both variables prior values. Increase the group value if both have changed. For example
group + ( a ne lag(a) and b ne lag(b) );
Case II:
Grouping determined from pair item slot value linkages over all data.
From grouping pairs by either key
General statement of problem:
-----------------------------
Given: P = p{i} = (p{i,1},p{i,2}), a set of pairs (key1, key2).
Find: The distinct groups, G = g{x}, of P,
such that each pair p in a group g has this property:
key1 matches key1 of any other pair in g.
-or-
key2 matches key2 of any other pair in g.
Demonstrates
… an iterative way using hashes.
Two hashes maintain the groupId assigned to each key value.
Two additional hashes are used to maintain group mapping paths.
When the data can be passed without causing a mapping, then the groups have
been fully determined.
A final pass is done, at which point the groupIds are assigned to each
pair and the data is output to a table.

Inserting Data using join in Hive

Hi I have two Tables and after Join I want to Insert Data into Third Tables. Problem I am facing is I have to create multiple records based on the value of Join.
Table 1
A B
-------
1 X
2 y
3 x
Table 2
A C
-------
1 Y
2 N
3 Y
I need to join Table 1 and Table 2 on Column A and Based on value of Column C in Table 2 I need to insert Records in Table 3
Rule
If Column C value is 'Y' then insert 3 Records as 'Red','Green','Blue'
If Column C value is 'N then insert 2 records as 'White','Black'
So Result should be
Table 3
A D
-----------
1 Red
1 Green
1 Blue
2 White
2 Black
3 Red
3 Green
3 Blue
Can you let me know how to achieve this using hiveql ? Thanks
You can create a third table Color
Table Color
------------------
Flag Color
Y Red
Y Blue
Y Green
N White
N Black
Now you can join them easily
Select * from Table1 T1
JOIN Table2 T2
ON T1.A = T2.C
JOIN COLOR C
ON T2.C = C.Flag

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