Hello, > I encounter problems with running the code in [1]. I guess it is not quite > related to kwant but caused by matplotlib and holoview. Since part of the > code relies on the function "spectrum", I appreciate any idea for tackling > the error, which is shown in the attached figure. Thanks.
You are correct -- this issue is not related to Kwant. It appears that your holoviews installation is not set up to use Matplotlib as a backend. I would recommend googling, reading the docs, or posting in the holoviews gitter channel[1] (in that order). Regards, Joe [1]: https://gitter.im/ioam/holoviews
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