Historical Data Timeframe Converter

Hello, Thanks in advance for your insight/suggestion.

I would like to convert 1minute historical data to 30 minutes data.
Is there free tool to do that?

Good Trading
adadadog

 

Got it free:

http://www.anfutures.com/ccdconvert.htm

 

You could try R with the xts library...

It has to.period which includes to.minutes30.

Description:

Convert an OHLC or univariate object to a specified periodicity lower than the given data object.

Cordially,

-DD-

"It's like they just gave you a new horse." -Dan Ingalls-

 

How is you data stored?

 

Thanks

in csv files.
the tool I found and posted above is not very flexible by the way.