[DFTB-Plus-User] How to get charge density difference by DFTB.

[孙萍萍]

Dear all,
I don't know how to compute charge density difference between two fragments,
I want to plot charge density difference by using two different colors to show
the increase and decrease of the electronic density.
I hope to get your help.
Sincerely hoping to get your reply.
Happy New Year!
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