Requirements and Performances

Minimum configuration required:

- Windows 7 or later

- 4 Gb RAM

- Full HD screen resolution (1920 x 1080 recommended).

T-LAB performances depend basically on two factors: the corpus dimension and the kind of CPU available.

At present, T-LAB options have the following restrictions:

• corpus dimension: max 90Mb, equal to about 55,000 pages in .txt format;
• primary documents: max 30,000 (max 99,999 for short texts which do not exceed 2,000 characters each, e.g. responses to open-ended questions, Twitter messages, etc.);
• categorical variables: max 50, each allowing max 150 subsets (categories) which can be compared;
• modelling of emerging themes: max 5,000 lexical units (*) by 5,000,000 occurrences;
• thematic analysis of elementary contexts: max 300,000 rows (context units) by 5,000 columns (lexical units);
• thematic document classification: max 99,999 rows (i.e. documents) by 5,000 columns (lexical units);
• specificity analysis (lexical units x categories): max 10,000 rows by 150 columns;
• correspondence analysis (lexical units x categories): max 10,000 rows by 150 columns;
• correspondence analysis (context units x lexical units): max 10,000 rows by 5,000 columns;
• multiple correspondence analysis (elementary contexts x categories): max 150,000 rows by 250 columns;
• singular value decomposition: max 300,000 rows by 5,000 columns;
• cluster analysis that uses the results of a previous correspondence analysis (or SVD): max 10,000 rows (lexical units or elementary contexts);
• word associations, comparison between word pairs and co-word analysis: max 5,000 lexical units;
• sequence analysis: max 5,000 lexical units (or categories) by 3,000,000 occurrences.
  
  (*) In T-LAB, lexical units are words, multi-words, lemmas and semantic categories. So, when the automatic lemmatization is applied, 5,000 lexical units correspond to about 12,000 words (i.e. raw forms).