Information entropy and number of valid categories
The non-negative frequencies or weights are normalized into probability, and the Shannon entropy and the number of valid categories are calculated.
Information entropy and number of valid categories User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- The information entropy of the four types of weights 1,1,1,1 is 2bit.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
For the positive probability, the sum of the negative p multiplied by the log2p is obtained, and the effective category is converted by the entropy power of 2.
scope of use
Probability is normalized by input weight; it does not represent password strength or predictability authentication.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Probability is normalized by input weight; it does not represent password strength or predictability authentication. Please compare the input unit, rounding method, applicable rules and data version first.