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seiwon

Canada
4 Posts
Posted - 11/29/2006 :  12:07:21 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.0 pro
Operating System: WIN2000

Dear Sir/Madam,

I have tacho signals(voltage-time) in the ascii format. Is there any method to conver this signal into the frequency(Hz)-time graph on the Origin using its features?
If it is available, please give me that infomation. It will be greatly appreciated.
Thanks.

Regards,

Jeongsoo

Deanna

China
Posts
Posted - 11/29/2006 :  8:37:15 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I think you will need to perform a short-time Fourier transform. Unfortunately, Origin 7.0 does not provide such a tool. If you really want to do that, you will have to write some Origin C programs.

The STFT tool will likely be included in the next version. Please stay in touch with us for future information about it.

Deanna
OriginLab Technical Services
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Mike Buess

USA
3037 Posts
Posted - 11/29/2006 :  9:36:59 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
NAG has STFT... see Samples\Programming\NAG STFT\NAG STFT.opj.

Mike Buess
Origin WebRing Member
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Deanna

China
Posts
Posted - 11/29/2006 :  10:25:56 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Yeah. You are right, Mike. I saw the OPJ now... Thanks!

Seiwon, just a reminder. If you cannot see the project explorer, use the Origin menu: View: Project Explorer to open it. Then you will see a hidden worksheet, data1. Paste your data into the first two columns of data1 and click Compute on the graph. This will perform STFT on your data.

Deanna
OriginLab Technical Services
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seiwon

Canada
4 Posts
Posted - 11/30/2006 :  2:25:42 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thank you Deanna.

I really apprecate your valuable informations.Mike as well.
I will try STFT and let you know the reults.

Many thanks again.

Jeongsoo
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