Kusto - Remove additional text from variable (Legend) in Kusto chart

Question

I have a Kusto chart that has Legend with the Variable name (Platform) from the Query. I would like to remove the additional text from this Legend. I did some research and was able to see similar results from SQL but could you please tell me how do I do it in KQL.

for example, from below I would like to remove the word Platform and package size from the Legend and display just the Win_T3 & Linux_T3

1. "Platform": "Win"_"T3": PackageSize
2. "Platform": "Linux"_"T3": PackageSize

Below is the Data Table

Below is how the Legend appears in the Chart

I wanted the chart Legend to show just windows_C4. Remove the Legend and Patch Size from the Legend. You could see in the first picture from the table the Patch Size for Legend in doff time

Answer 1

You want something like...

<Your query>
| render linechart with (legend = hidden)

For more options refer to the following page with the properties section

https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/renderoperator?pivots=azuredataexplorer

Answer 2

This is pretty hacky, but I thought I'd share it anyway because it somewhat helps the readability.

<query>
| summarize ['&nbsp;']=PatchSize by ['&#32;']=LegendName, Timestamp

Answer 3

You can manipulate the value in the relevant column, just before you render the chart. Something like this:

<your query>
| parse Platform with '"Platform": "' PlatformPart1 '"_"' PlatformPart2 '" : PackageSize'
| extend Platform = strcat(PlatformPart1, '_', PlatformPart2)
| project-away PlatformPart1, PlatformPart2
| render ...