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protobion

India
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Posted - 01/22/2005 :  03:00:32 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I am plotting Linear fits of data. I cannot find an option that allows me to get the slope of the linear plot.
Anyhelp here please?
Er, no Labview available.

Edited by - protobion on 01/22/2005 03:09:01 AM

Mike Buess

USA
3037 Posts
Posted - 01/22/2005 :  07:40:44 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
The Analysis->Fit Linear and Tools->Linear Fit menu commands print slope and intercept to the results log. Use the stat object to obtain those values programmatically.

>>Er, no Labview available.

That's OK. LabView is not required.

...You can add a text label to your graph showing the slope and intercept as follows.

1. With graph active run Analysis->Fit Linear.
2. Enter this LabTalk command in the script window...

label -s -sa "slope=$(stat.lr.b)\nintercept=$(stat.lr.a)";

That will create a text label that looks like this...

slope=<value of slope>
intercept=<value of intercept>

Mike Buess
Origin WebRing Member

Edited by - Mike Buess on 01/22/2005 12:07:28 PM
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protobion

India
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Posted - 01/23/2005 :  02:23:03 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks a lot Mike. I can now do exactly what I wanted to. Is there any way to turn this into a convenient button?
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Mike Buess

USA
3037 Posts
Posted - 01/23/2005 :  06:00:44 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Open Custom.ogs in notepad and replace the script under the [Main] section with your script. That section is run by the Custom Routine button on Origin's standard toolbar.

Mike Buess
Origin WebRing Member
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protobion

India
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Posted - 01/23/2005 :  08:18:39 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks again. I see how this button-script relation works now.
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