how to get extract field in a numeric format?

[gwtm_hak]

I'm trying to extract value from a field in the raw text using a regular expression. I want the field values to be extracted in numeric format, but when I field extraction the value is in a string.

{"values":[17.4991095961511,17.4991095961511],"dstypes":["derive","derive"],"dsnames":["io_time","weighted_io_time"],"time":1565729243.743,"interval":2,"host":"node1-zanzibar","plugin":"disk","plugin_instance":"sda","type":"disk_io_time","type_instance":""}

I used the below expression,

^\{"(?P<values>\w+)

which captures the values field but not the values relative to that field.
So I tried with adding d+

^\{"(?P<values>\d+)

There was no result. can anyone help me solve this?

[nareshinsvu · Accepted solution]

Can you try this?

|makeresults 
|eval _raw=" {\"values\":[17.4991095961511,17.4991095961511],\"dstypes\":[\"derive\",\"derive\"],\"dsnames\":[\"io_time\",\"weighted_io_time\"],\"time\":1565729243.743,\"interval\":2,\"host\":\"node1-zanzibar\",\"plugin\":\"disk\",\"plugin_instance\":\"sda\",\"type\":\"disk_io_time\",\"type_instance\":\"\"} " 

 | rex field=_raw "\{\"values\"\:\[(?<values>.*?)\s*\]\," max_match=0 
 | makemv delim="," values  
 | mvexpand values
 | table values