wrong leaves determination of _dendrogram.py

[444thLiao]

When I using the function for creating dendrogram, I meet some wrong presentation of the leaves.

In your code(~/.local/lib/python3.6/site-packages/plotly/figure_factory/_dendrogram.py), we can see that

Above code without comment is the original code for determination the y axis tick or labels. In the first image I provide, you can see that 138-140 line code will raise silent error which mean wrong alignment of leaves of dendrogram and labels.

So I make a litter bit revise of this by 142-145 code (Of course without comment and I have use this in my computer, as far as I see, it will not raise any conflict.) .

Here is the code

        if len(self.zero_vals) > len(yvals) + 1:
            l_border = int(min(self.zero_vals))
            r_border = int(max(self.zero_vals))
            self.zero_vals = [v for v in range(l_border,r_border + 1, int((r_border-l_border) / len(yvals)))]

#1180

[jonmmease]

Hi @444thLiao , thanks for the report. I left some comments over in #1180 , so we can continue the conversation over there.

[jonmmease]

Done in #1186. Thanks @444thLiao!