Our picolog software does not support bar graphs.
The other option would be to modified one the examples in the SDK.
You use the excel or MATLAB.
You can download the Software Development Kit from our website at:http://www.picotech.com/software.html
In the right hand column, click on PicoSDK 32 bit or PicoSDK 64 bit to download.
Please read this forum post for more information about the SDK packages-https://www.picotech.com/support/topic18991.html