# Tooltips with string data fail on GridMatrix

**URL:** <https://discourse.holoviz.org/t/tooltips-with-string-data-fail-on-gridmatrix/893>\
**Category:** HoloViews\
**Tags:** hover\
**Created:** [June 26, 2020, 3:20am UTC](https://discourse.holoviz.org/t/tooltips-with-string-data-fail-on-gridmatrix/893 "2020-06-26T03:20:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![animal](https://discourse.holoviz.org/letter_avatar_proxy/v4/letter/a/f04885/32.png) [@animal](https://discourse.holoviz.org/u/animal)\
**Post date:** [June 26, 2020, 3:20am UTC](https://discourse.holoviz.org/t/tooltips-with-string-data-fail-on-gridmatrix/893/1 "2020-06-26T03:20:59Z")

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Hi! This is my first day using HoloViz, so I’m sorry if this is an easy answer.

I’m trying to make a GridMatrix of scatter plots to explore multivariate data.

I’d like to be able to find some string name or ID associated with certain points if I hover over them.

I’m successfully using the Bokeh HoverTool to display the numerical data from the vdim categories in the GridMatrix.

However, I haven’t been able to display the solvent name. I’ve tried storing this as both Pandas object dtype and the StringDtype with no luck.

I’m worried that this behavior is a side effect of the GridMatrix not supporting categorical datatypes as mentioned here: [https://gitter.im/pyviz/pyviz?at=5d236d460b07314d50261f3e](https://gitter.im/pyviz/pyviz?at=5d236d460b07314d50261f3e)

Here is a screenshot of the plot and the relevant code:

 ![image](https://discourse.holoviz.org/uploads/default/original/1X/713a659a69ba8f136f3600d8b0e736730295c7e9.png)

Thanks for your help!