Hello
Sure you can extract data from Excel sheet. Wandora features several extractors that take Excel files as input and create topics and associations out of Excel data. Documentation is at [1].
Second option is to export a CSV file out of Excel and use Wandora's Simple CSV association extractor [2].
Third option is to copy Excel data into a text file via system clipboard and use Wandora's Adjacency List Import [3] or Incidence Matrix Import [4].
And you can always just paste the data into Wandora. Look at the submenu options under Paste Also... And you may find Sketch Grid [5] useful.
Depending on your data and specific structures in the data, it may be necessary to import the data in smaller chuncks.
Kind Regards,
Aki / Wandora Team
[1]
http://wandora.org/wiki/Excel_extractors[2]
http://wandora.org/wiki/Simple_CSV_asso ... _extractor[3]
http://wandora.org/wiki/Adjacency_list_import[4]
http://wandora.org/wiki/Incidence_matrix_import[5]
http://wandora.org/wiki/Sketch_grid