Getting Started

Hi,
I would be appreciated if you explained how could I add year in last report.
Thanks,

Dear sir,
I have now installed the latest version today but it is not activating following options while going for analysis:
1. Citation
2. Co-citation
3. Bibliographic coupling
Waiting for your suggestions.

Hi,
I am a lecture at King’s College London and I am using Vosviwer for the first time. I am looking to map/ link who published with whom and how much- sort of network of authors, from where I coudl hopefully pull out he netwokrs of the most published authors.
I have a file in csv format with Title of paper, and columns with Author1, Author 2etc..
I tried uploading this file but get multiple errors the main ones:
1. When the title of paper remains in the file it just will not take it
Else one time it said number of columns should be greater than number of lines
My file has 1500 rows and 10 columns – does that mean I need to create 1500 columns ( the maximum authors we have on any one paper is 10)
2. Line 3 unique ID (line three has two authors who have collaborate don many papers)- this is the Most common error I have been getting.
I tried putting none31 in line 2 and none32 in row 3 so that the two rows would not be exactly alike but that did not work.
Is there a simple way to upload a such a csv and get a network of authors mapped out?
Would appreciate any help you can provide. Happy toc all and chat or do an MS teams call.
Thank you in advance fro your help.
Please a snapshot of the file below - sorry the formating is not okay but it is from a csv file.

Title Author-Name-1 Author-Name-2 Author-Name-3..
Measuring Consumer Interactivity in Response to Campaigns Coupling Mobile and Television Media ROBERTDAVIS LASZLOSAJTOS

Hi
I have created many thesaurus files but am encountering a strange problem with the most recent one. The file filters correctly for all analyses EXCEPT author citation analysis. For example, when I run author co-citation analysis the author names are correctly replaced with the alternate form. Keywords and countries are also replaced correctly.
Any idea why that would happen?
Philip

Hi,
thank you so much for offering free of charge VOS viewer, it is amazing progress compared to some other previous softwares. I kindly ask you for your help, with mapping collaborators on a geographic map (Case 21 in AIDA booklet).
Namely, I tried to understand how to add extra nodes that represent country boarders but have not been successful. Can you please explain me how to do that and where exactly to find instruction?
Thank you.

Hi, I want to use VOSviewer to make a term co-occurrence map, but I found that the Chinese abstracts in the RIS file I imported cannot be recognized, and only a few English words can be subsumed in it. I have not found any information about Chinese abstracts on the Internet. So I am sorry to bother you, is it because Chinese is not supported? Thank you.

We created a list in Scopus and downloaded as CSV. We did not open the csv file or change it in any way.
We opened VOSviewer and loaded the file. However, the only analysis options that appear are Co-author and Co-occurrence.
Why would that happen?

Hi,
I'm trying to create a map using a CSV file which I downloaded from Scopus. But an error message "Error while reading Scopus file 'scopus.csv';-1. I tried to download and make another new file in several times. What is the meaning of "-1" in the error message ? How can I resolve this ?
Thank you.

I'm having a problem and is that when I try to put a thesaurus to mi file, I follow all the steps that the manual said, but when I'll try to put it, VOSviewer says that the header of the first line is empty, and it is not

Hi!
I'm trying to create a map from PubMed. I've exported them like file with Medline format. Once I'm trying to open them in VOSviewer it says ¡ : "Error while reading PubMed file `pmc_results.txt` (line 2530): Multiple DP fields".
And I have no idea about what I should do. Please, could you help me?
I've used the software in the past and I have never had this problem.
Thanks in advance.

Hi, I am importing a pajek .net file into VOSviewer, but it says "error: all items have same coordinates." How should I fix this?

Hello there,
I have a meta data exported from Web of Science, I wanted to analyze author bibliographic coupling, but unfortunately, some of the authors' name have written differently and they are counted twice or more and they got different scores.
exp: Boje, d. or Boje d. m. or Boje, dm.
so, the result is not valid, is there any way to have more accurate result?
Many thanks.

Dear Ness and Ludo,
Thanks for the wonderful demonstration on the YouTube. I tried to install the VOSviewer in my mac catalina. But the VOCviewer file opens but very soon closes by itself without any warning or such thing. I downloaded the latest Java and tried to use the tutorial you have provided for MAC users. But I did not get the settings/ open any way option at all.. Please let me know how I can install the VOSviewer.
Thanks,
M

I am reviewing a ms for publication and the author has applied journal co-citation
network analysis, author co-citation network analysis, and bibliometric coupling to a database consisting of only 54 journal articles. It is my understanding from discussions on this Board that this is well below the necessary threshold for obtaining valid results through these bibliometric analyses.
Am I correct, and are there any conditions that would make the application of these analyses to such a small viable?
Thanks.

Hi,
I have built a reference list based on a search on ProQuest, scanned / culled using Research Scanner with the selected references saved into an EndNote X9 database. I would like to use the EndNote output to run through VOSviewer. The output formats available are .txt and .enl files which I have not been able to make work. Unfortunately VOSviewer seems to be looking for .enw formats or .txt files in different formats from EndNote. Can you confirm that this is the case or point out what I am not doing correctly?
Kind regards

Hi
When I select the keyword option by author, VOS generates the word map and its links and builds a cluster based on these keywords. My question is how I can identify the authors by keyword cluster. it's possible?

Hello,
While working with the VOSviewer, one question occurred. Regarding the co-occurrence map, the link strength between two keywords shows the number of co-occurrences in a document. What is the interpretation of the distance between two items? It is mentioned in one of your articles that the distance depends on the similarity. What are the requirements for items to be similar?
Thank you in advance
Kind regards

Dear Developers,
I would like to ask about creating a map of research articles connected with each other through citations. For example, if I have 100 research articles these may not be from one specific journal. What I need is that how these 100 research articles are connected with each other through citations. So, what should I do in order to get what I need. I would appreciate for any type of guidance with or without vosviewer.
Kumar

I downloaded data from Web of Science and I want to create a keyword map. When I selected the file I got an error message 'Error while reading Web of Science file 'xxxxxxx' (line 3): Incorrect number of columns.' Why might this be and how do I fix it?
Thank you!

Dear,
Is it possible to combine to CSV file from two or more different source? for example one is from Scopus and another from Pro-quest? If so, how? help please so I can use both in one file for VOSviewer run? thx you

Greetings. I have built my own bibliometric article database with the help of a programmer. When I import an excel file with Source and Target, I run into a dilemma because some of my sources are also targets. Do you have any suggestions? Thanks.
Simon

Thank you very much for your invaluable software. It helped me very much when I conducted a bibliometric study on a single journal.
https://www.jlls.org/index.php/jlls/article/view/2075
I would like to ask for your feedbacks on how I run the software and interpreted the results.
Your feedbacks certainly improve my further bibliometric studies using your software.
Thank you.

Could you please clarify this point about journal co-citation analysis. If VOSviewer shows 266 cited references of a particular source in co-citation analysis does it mean:
a) the journal was cited 266 times by sources contained in the review database, or
b) 266 of the sources contained in the review database cited this journal, or
c) different interpretation?
Thanks

Hello!
At first, thank you so much for this great software.
While doing a bibliographic analysis one question did arise. In the documentation of the bibliographic results I would like to implement the cluster and given keywords calculated by the VOSviewer, which are usually shown in the Action panel in the Items tab.
Is there a possibility to save all the clusters and appropriate keywords for example in an Excel file without typing them manually down? This would be a great help to easily extract the information of the clusters and keywords.
Thank you very much in advance!
Best regards

Dear Ludo,
congratulations on implementing this software. I have only one doubt: I am carrying out a bibliographic coupling analysis but I do not understand the criterion for which papers are associated with others in different clusters. What is the relationship that associates for example two papers in a single cluster? Even comparing them one by one I can't figure out what the relationship is. is it possible to have an explanation? Thanks in advance

Hi,
We've mined Scopus data via their API (not their website manual download). Can you provide an example .csv or .txt file for us to structure our data so that it is readable by Vosviewer? A public link (google or onedrive) for downloading the example file would help? I can also email you if you'd like.

I am trying to do co-authorship participation of authors. For an author, I screened and vetted his number of publications to be 142. Vosviewer analysis keeps bringing 96. This same thing appears for other authors with many publications on Scopus on the subject but yet Vosviewers keeps reducing the number of co-authorship. What can be done?

Greetings,
Doing a co-occurrence map based on text data, I am aware of the technique of using a thesaurus file to merge two or more terms. However, I would like to know if it is possible to split one term in two terms.
For example, in the title “European club capitalism and FIFA redistribution models”, VOSviewer identifies “fifa redistribution model”, but I would prefer to identify “fifa” + “redistribution model”.
Best regards.

Goodmorning!
I have uploaded on VOSviewer a .csv file and it works except for the function "co-occurrence".
I've tried with other .csv files too, but it is always impossible to select the function "co-occurrence", that is the one that interests me the most.
Could you help me?
Thank you very much,
Chiara

Thanks for this wonderful tool.
I just need to know is it possible to edit labels on a map. Specifically, I need to modify the country names in co-authorship network of countries. For example I need to change 'people republic of china' to 'China' in the final map. Kindly guide me in this.
Thanks

Dear Ludo, I would like to kindly ask why the association strength is not employed by both VOSviewer and CitNetExplorer. I believe that your papers were very convincing to the adequacy of the association strength as the normalization method. And yet it is employed by only one of your softwares. Thank you in advance. Rafael.

Thank you very much for the VOSviewer. My colleagues are working on an author analysis. We created our thesaurus and have begun our analyses. Our issue is that we have one author whose name appeared several ways in our RIS data. We double checked our thesaurus - however he still appears as multiple nodes. Other folks on our thesaurus are appropriately identified. What might be causing this anomaly?

Hello!
I downloaded the data from Web of Science (from the Export option by choosing Other File Formats option, Tab-delimited file format and the Full Record and Cited References option) but when I want to do a keyword co-occurence analysis based on bibliographic data, I can only select "author keywords". The software doesn't allow me to choose "all keywords" or "KeyWords Plus" as a unit of analysis. What's the reason and how can I handle it ? Thanks for your answers in advance!

Hello!
I'm trying to open a CSV file which I downloaded from Scopus, but an error message "Error while reading VOSviewer map file (line1)": XXX is not a valid column header." pops up. As advised, I removed unnecessary information before downloading the CSV file from Scopus, but the message keeps coming back. I tried several times with less and less information on my CSV file, but still the same with new XXX each time .
How can I resolve this??
Thank you!

In VOSviewer the the types of analysis options are not active. How can I solve this problem?

I have uploaded the ris file but I couldn't get all the option of country , citation options

I cannot see the links between labels on the map. There is no lines part in the interface. can you help me?

Hello,
I have a problem that I could not solve for a long time. I tried with three different computers (both windows and mac OS). Hope that you can help me about it. After I made a cluster analysis on Vosviewer, I save both map and network files. However, these files do not include the information related to "url". "Url" column exists in the file but it is empty. Therefore, I cannot see the documents' DOI numbers that will enable me to merge with other databases. I am sure that it is not related to the Web of Science data, as DOI numbers exist in WOS data file.
Hope that you can help me,
Nilay

Dear peter Kokol,
I am using VOSviewer with Scopus it giving error on although i have downloaded papers and saved . The error title is
" While reading Scopus File, cannot find Authors, Keyword ....
I will be glad for your feedback thank you

Hello,
First thank you for your awesome tool and for making them freely accessible.
I'm trying to make a map using WoS data. Before the new year, I was able to download the full citation and metadata in batches of 500 as recommended in the tutorial. After the new year, I now only have the option for author, title, source, abstract, which seems to severely restrict the types of maps I can generate. I tried from two different university accounts to get the fuller txt files. I also tried the classic version and new beta of the platform. Is this something specific to my universities or is this a change across the web of science? If so, any suggestions for generating maps beyond author co-occurrences (e.g., country/institution/citations) using WoS?
Thank you!

Hi team,
I have downloded articles metadata from different databases and import all of them into endnote for literature review. After two rounds of data refinement and cleaning unrelated articles, I want to import the final sample into Vosviewer.
However, I have got an error in reading file.
Would you please help me to solve it.

For those having problems with creating thesaurus files:
• In the map you will often see terms in singular and plural form or with/without a hyphen
(-), etc. You can merge these keywords by using a thesaurus file (in the step Choose type
of analysis and counting method). Create a two-column table in Excel. Name the first
column label and list the keywords you want to delete. Name the second column replace
by and enter the replacement keywords. If you leave the cell in the column ‘replace by’
empty, the keyword in the column ‘label’ will be removed.
Save this file as a text-file (tab delimited). You can upload the file in the step ‘Choose type
of analysis and counting method’.
• If you want to save a picture of the map, click Screenshot on the left side of the screen
and choose Save to File.
• You can adjust the clustering: under Analysis > Clustering the default clustering resolution
is 1.00. When you enlarge the resolution (for example 1.20), you get more clusters. With a
smaller value, you get less clusters.
• You can see the keywords under the tab Items.
• Click Save > Map to download the list of keywords in the map
(Source: https://redesigninginformationliteracyeur.files.wordpress.com/2017/05/iss_scoping_search_development_studies_and_global-south-vosviewer.pdf)

Hi,
I am facing trouble of presenting the lower case characters to uppercase, at least the first letter of each word I want in upper case in the map. Can you please suggest me how can I correct this problem?
Thanks in advance for your supports.
Bishawjit Mallick

Hello Team,
I just downloaded VOSviewer but I need your assistance in clearing an error in a .csv file containing data.
This is the error I keep receiving when analysing the data:
'Error while reading Scopus file 'Scopus_exported_refine_values (8).csv' (line 8): Incorrectnumber of columns"
Thanks.

Dear Ludo, i am really very grateful for your answer. See you soon.

Hi Ludo, sorry for bothering you but I feel the need of a comparison and a comfort: what do you think about coupling and mapping references on the basis of keywords (column DE in a WoS file) and not (or also) on the basis of cited references (column CR)? Thanks for your attention and my best wishes for the upcoming holidays.

Do you have an R package for VOSviewer? It will be a great hit.

Hi!
Could you help me with a situation? I am using a thesaurus with the intention of to combine some keywords that have the same meaning, however, I am not successful in the sum of the occurrences with some of these words. For example, I am trying to combine “human - 20 occurrences” with “humans - 17 occurrences”, however replacing “human” with “humans” I get 20 occurrences and not 37. I emphasize that this failure does not occur with so many other words used in the same thesaurus. In these cases, the sum occurs as expected. I appreciate if you can help me.

Hello, how can I set not to convert to lowercase letters in the process of importing data?

Hi,
is there a video on how to upload the maps online?