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 How to fitting error function		  New Topic  Reply to Topic
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dhxyyuan

Albania
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Posted - 01/26/2007 :  04:05:43 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin): 7.0
Operating System:windows xp

Hi everyone, I got a problem.
How to curve the error function?? the mathematic expression is :

y=0.35-(0.35-a)*erf(x/sqrt(4*d*155552000))

y is dependent variable, x is independent variable.
d and a is what i want. Thank you!!

zachary_origin

China
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Posted - 01/26/2007 :  04:38:30 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
I think you have known how to create a use-define fitting function as you post this in OriginC forum. (If not, you can first learn it from the help.)

In the function definition page, make sure you have checked the Using Origin C in the bottom, click Edit in Code Builder button to open Code Builder and add #include <Stat.h> in the header section. Then compile it(it should be fine without error) and return to NLSF (remember to click Save button in NLSF).

Hope it helps,


Zachary
OriginLab Technical Services.


Edited by - zachary_origin on 01/26/2007 04:41:41 AM
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