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Possible to group by non-unique values - a range of values?

October 6, 2016, 12:24 pm
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Is it possible to group by non-unique values, but rather a range of values, or values with a certain range?

For example, I'd like to group the following non-unique values in a column into one row: 5.1, 5.3, 5.9, 6.3, 6.8. For this example, I'd like to tell KNIME to group numbers that are within +1 or -1 of a value (6 in this example). So in essence, I'd like it to group numbers that are within a certain value range (so within 2 integers for example). Is it possible to do this?

Thanks in advance.

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excel text analysis

October 7, 2016, 4:30 am
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I am completely new to Knime.

I have an excel file with several sheets containing words in the cells (one cell=one word). I would like to see which words cooccur together? I thought I need text prcessing, but since it is stored in an excel file I do not know how to connect the text data in excel with the text processing abilities of knime. If somebody could help me it would be great; if somebody knows a possible workflow too for the entire process it would be a great help.  Thanks

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association in knime

October 7, 2016, 5:33 am
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I have a data set that i want to apply association rules on it

After association rules application a set of items only appear 

I want to know in which row (of the original data set) these itemsets belong

Please answer me

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Reges based on blanks and forward slash

October 7, 2016, 8:35 am
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Hi All,

I would need advise on splitting out an non equally formatted number and "/" combination.

In a database I have cells containing always 2 numbers, being separated by a slash and always embedded into other text.

This number combination part shall be extracted to a separate column, ideally by regex split.

Unfortunately the number parts are not in unique format, i.e. length.

Samples are e.g.:

OTHERTEXT 20/1156 OTHERTEXT

OTHERTEXT 1506/02 OTHERTEXT

OTHERTEXT 4000/00001 OTHERTEXT

The bits I want to extract are always surrounded by a "" (tab)

I tried loads combinations with wildcards, smth like    .*("") .* ("/").*("").* but either it had a sytax error or didnt work and no result came.

Has anybody an idea how to achieve this (can be also other node).

Thanks a lot,

Jürgen

 

 

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Use a Flow Variable and a Column as join keys in Joiner

October 7, 2016, 1:06 pm
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Hi. I am new to KNIME and trying to figure out if we can have a join condition where one of the join keys is a flow variable and the other is a regular column. When I try to use the flow variable as a predicate, it ignores the other column in the join. I have attached the worflow image as reference.

Thanks,

Nitin

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How to read some local (offline) *.htm files?

October 7, 2016, 2:53 pm
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I have saved some web-pages into a folder as htm files. So they are 'offline' (local) files.

Then I gather them into the start of a Knime workflow with the List Files node.

I connect that node to the HtmlRetriever node, but the files cannot be read (file content is not retrieved), whether I use the file Location or URL column as the source. I get the message "Error retrieving file... Target host must not be null, or set in parameters."

I tried converting the URLs (strings) to URIs, but the URIs cannot be read either.

Not sure what I am doing wrong? My eventual aim is to extract some of the data from the tables within the htm files.

I cannot retrieve the HTML via an online process as the website is password-protected and cannot be accessed directly by Knime (I assume).

*** UPDATE ***

OK, problem solved (resolved)... looks like the html was saved wrongly in the htm files, hence not readable. E.g. angled brackets < and > were saved as &lt; and &gt; and so on.

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Shift or fork to github?

October 8, 2016, 12:19 am
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Hi:

I am an fresh developer of KNIME.
I find current development environment is too unfriendly for entrance level developer. Source code can't be viewed easily through website. Another thing is about the forum and wiki. When I want to search about the development issue, I will end up find many topics for user level not developer level. And the forum search is really slow without previewing some result. That make searching inefficient, so I want to ask why not use github, based on git, not svn and provide wiki, issue ... many useful system related to open source project. The poor thing about KNIME wiki is that it is not up-to-date and hard to edit. I appreciate what KNIME works on, but the unfriendly developing environment make me feel a hard time, so I think start a discussion about this and make us have opptunity to be better. You may find offensive, but it's not my intention and I am not fluent in English, so maybe I can't convey my thoughts precisely :(

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word count using excel

October 8, 2016, 1:57 am
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I have a simple query & new to KNIME. I am able to read single excel file using XLS reader. I am basically have something like this for input from an excel sheet with 2 columns:

Excel Input:

Ticket  Problem

1          Memory

2          Disk

3          Controller

4          Disk

5          Memory

6          Disk

Expect output:

Problem category     Ticket Count

Memory                     2

Disk                           3

Controller                   1   

I read many forums and it was mentioned to use String to Document node after reader in order to proceed.  I fail to understand why we need to use "String to Document" in order to use other node fuctions. Is this how KNIME is designed to work only if things are in a form of Document? Please help with a sample workflow to get the expected output.

Regards,

Salz

 

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KNIME crashes when trying to view output tables of RDKit nodes

October 8, 2016, 8:54 pm
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Every time I try to view the output of the RDKit from Inchi node, KNIME crashes.  Also, trying to view output of ANY subsequent node crashes KNIME.  I've tried all 3 memory policies in the "RDKit from Inchi" node and it still crashes.

The entire workflow does work but I really need to see the output tables before writing to my database because I've had a few cases where the nodes generated "junk" that I didn't want in my database.

Note: I can view the output tables for both the "Molecule to CDK" and "Molecule Type Cast" nodes so that's why I think it's specific to the RDKit nodes.

KNIME Build 3.2.1 (8/19/2016) Java JRE 1.8 on OSX 10.8.5

Error output below
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Crashed Thread:  61  Java: AWT-EventQueue-0

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000

Dyld Error Message:
  Symbol not found: ___sincos_stret
  Referenced from: /Applications/KNIME 3.1.0.app/Contents/Eclipse/plugins/org.rdkit.knime.bin.macosx.x86_64_3.0.0.v201606050430/os/macosx/x86_64/libGraphMolWrap.jnilib
  Expected in: /usr/lib/libSystem.B.dylib

 

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Simple exponential smoothing model

October 9, 2016, 8:44 am
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I am using the Moving Average icon to apply the simple exponential smoothing model, and it is asking me for a window size. Unless I am horribly mistaken, there is no window size... instead one has to find the optimum value of alpha.

 

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Relating association rules results with the original dataset

October 10, 2016, 3:51 am
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I have a data set that i want to apply association rules on it

After association rules application a set of items only appear 

I want to know in which row (of the original data set) these itemsets belong

Please answer me

 

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How to write java code in KNIME?

October 10, 2016, 4:06 am
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I want to write and implement a java code in knime program

how can I do this?

and how I relate a result of a node performed in knime with my code?

e.g. I made association on a data set and i want the result to be an input to my code, how can i do this?

Thanks in advance

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TimeStamp Split date and time

October 10, 2016, 7:36 am
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Hi, I have a column (Timestamp) with the following format:

21.Nov.2014 09:39:03

How can I keep only the 21.Nov.2014 and basically make it look like 21.11.2014?

I tried string to date/time, didnt work. I am getting this strange date

2014-11-2100:00:00.0

Is there any easy way to do?

 

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Extract workflow variables

October 10, 2016, 8:23 am
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Good evening,

Supposing I have a .knwf file created by someone, and supposing I'm not interested in knowing how the model has been built, since I just need to run it from batch, is there some way to know the names of workflow variables that are available to be set from batch, so without opening the model with Knime?

 

For example, I have a test.knwf and I would like a list of all workflow variables' names that I can change to set these parameters from batch. So, supposing there are two variables like these:

-workflow.variable=country, "USA", String

-worflow.variable=age,23,int

I would need to know their names, so in this case I should have a list or something with "country" and "age".

 

Thanks a lot!

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Partitioning node: Stratified sampling by integer

October 10, 2016, 11:17 pm
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Hi Knimers

I'm following a MOOC about ML in R where they do 2 things that I don't know how to do in Knime yet.

1 - Stratified sample using an integer variable ( Partitioning node only shows strings);

2 - Set a sed as 101 (?)

Any help on this topic?

Tks

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Linear Regression with integers result in double

October 10, 2016, 11:42 pm
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Hi Knimers

I'm trying to understand why my linear regression with all integer columns is predicting a column with double numbers. In this case, the scorer node doesn't work well :(

Sorry if I doing something stupid :)

Cheers

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Check/Plot residuals in a Linear Regression

October 10, 2016, 11:47 pm
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Hi all,

Me again...I couldn't find how to plot or check the residuals in my linear regression.

Should I create a new column comparing actual values and predictions?

And how about errors in a regression?

Tks again

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Big Data Connectors disappeared for unknown reason

October 11, 2016, 2:27 am
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Hey,

today I have installed the Knime Image Processing update 1.5.2.201610061254 and updated from version 1.5.1.201609282045. Since then I have no access to my big data connector extension...

Everytime I started Knime and a workflow with big data extensions for editing I got the error message "Errors during load due to missing nodes (HDFS Connection, Hive Loader, Hive Connector, HDFS File Permissions). Do you want to search and install the required extensions?".

If I click on "yes" I get "KNIME Big Data Connectors    3.2.1.v201610031135", the "next" button is available but not clickable. So I check my Installation History and exactly this version is installed.

So at first I removed the Big Data Connectors completely and reinstall them, but same error message...

 

Greetings,

mheitzhausen

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Custom Job Name

October 11, 2016, 3:36 am
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Dear, 

I want to give an end user (on the web portal) the ability to enter a custom job name, so they can save their executed workflows with a better name, instead of the current name "workflow name plus execution time"...

How can I do that?

I know I can do it through the Knime Workbench, through the "Execute workflow on server" window in the "Custom job name" field, but my end users do not use the workbench...

Best regards,

Koen

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Time Series Forecast with MLP with exogeneous Variable

October 11, 2016, 6:04 am
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Hello KNIME,

I want to use MLP with exogenous variables to do a forecast.

How I can use the MultiLayerPerceptron Predictor in my Case? I did not find how to add exogenous parameter for MultiLayerPerceptron Predictor node

My Case:

I have three variables Time t; Data y and one exogenous varible x.

For the time 1  to t I have data f(1) to f(t) which are influenced by the exogenous variables.

For the future time from t+1 to t+n I have the exogenous variable, so I want to predict the data value from f(t+1) to f(t+n).

The excel data is in the attachment.

A German Lituary describes Time Series Forcast with MLP-Networks with exogenous varibles.

http://www2.inf.uos.de/papers_html/um_5_96/start.html

Thank you very much!

 

 

 

 

 

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