not able to display graph in front-end of live site

Basically it will take data from an analytics tool – https://piwik.org/

And then display it as a side bar widget in the front end as set out below.

No, currently there is no short code to add the visitor graph to your frontend.

But you can use Piwik widgets:
https://piwik.org/docs/embed-piwik-report/#embed-a-piwik-report-in-a-html-page
https://demo.piwik.org/index.php?module=Widgetize&action=index&idSite=7&period=day&date=yesterday

Thank you so much.. But may i know how to register to the piwik.org site with my site details??

You should use your own Piwik setup, of course. I just posted the link to the Piwik.org demo site to show how it looks like.

So, log in to your Piwik installation, click at your username in the top right corner and then choose “Widgets” in the left sidebar.

Thanks a lot..:)

One more doubt Sir..I can display the graph in the front-end, but the new users who visits the website, they need to login to piwik account each time..Is there any way so that the users needn’t do that??

Yes, you have to grant access to the anonymous user. Please have a look at the documentation I linked before: https://piwik.org/docs/embed-piwik-report/#change-user-permissions

Thanq Sir..Can i remove the border of widget or can i customize the class inside the piwik iframe?
My client has registered in piwik from this domain—> https://****.piwik.pro/index.php?
I feel it’s all encrypted..Here is the file from where the css is coming from—> https://********.com/piwik/index.php?module=Proxy&action=getCss&cb=bcae6cc2903ee97ae7d378859bce6bd0 and I am not able to edit or override any of the css from my css(theme).

To get support on Piwik itself, please have a look at the Piwik community https://piwik.org – or ask your client to contact the Piwik Pro support.

Here I can just give support on my WordPress plugin WP-Piwik – sorry!

No problem..Thanks a lot for replying to my queries..

You are welcome. I hope you (and your client) will enjoy Piwik and WP-Piwik. ??