Hi everyone, I am trying to use the PCA node to reduce the number of features. I did that with several datasets. However, I am trying to do the same with this dataset and it is impossible to get the node working, and I do not understand the reason.
The fail is the following: “ERROR PCA 0:2 Execute failed: illegal state: convergence failed”
The flow is quite simple, CSV reader followed by a PCA node and the execution fails. The database is the following: bd.csv.zip (723.1 KB)
Thanks in advance.
Hi @krosis and welcome to the KNIME world,
I was successful executing your setup, however I would suggest to use a “File reader”-Node in order to read the csv-file. Perhaps, the configuration of the table in the first step differs.
Z_005_pca.knwf (20.6 KB)
Thank you very much @tommy, It seems that the newer version of the PCA node works in another way, because in the attached workflow I used your node and the newer node and the newer fails again. However, you helped me a lot. I can continue with my research using deprecated nodes.
Z_005_pca.knwf (29.4 KB)
Hi! I have the same issue using knime 4.0.2. I can’t realize where the problem is.
If I use a few columns (~50) it works, but with more columns It fails. I’m using PCA to reduce the number of features.
I attached workflow and data.
Thanks in advance
users_and_tables.knwf (72.7 KB)
users_tables_count.csv.zip (17.4 KB)
4.0.1 the same error.
3.7.2 works excellent.
Thanks for your response @hugobellomusto, I forgot to post in my first message the knime version that I am using. I am using the version 4.0.2. Hence, it seems a bug or that something is wrong with this node. We can use like @tommy used in his workflow the deprecated node of PCA, but would be nice to solve this issue. I do not know if I need to open a ticket to bugs or if the knime staff will read this post, any idea?
Hey everybody -
Thanks for letting us know about the issue with the PCA node. Let me do a little digging and see what I can find out.
EDIT: I was able to reproduce the problem, and filed a ticket. We’ll update this thread when a developer has had a chance to review the issue. Thanks again!
I must give thanks to the users’ answers, but besides thanks to knime staff, because the staff did a great tool. I came from weka and the improvement to make my research using knime was incredible.
I’ll be watching for news from you about this thread.
Are there any news on this issue?
Hi @gnime -
This ticket is actively being worked on, but I don’t have an ETA for you yet. Stay tuned.
thx for reporting this issue. The problem has been fixed as part of our 4.1.0 release.
Thanks for resolving the problem so quickly.
Is there already a date for release 4.1.0?
Hi there @gnime,
Sure there is. Today. Just released
Thank you for solve this problem!
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