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LCG
Canada
9 Posts |
 Posted - 06/26/2013 : 4:25:09 PM
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Hello,
I'm trying to write the attached equation into origin.
I'm using OriginPro 9, I chose excplicit/labtalk script where
Fsb= dependent variable
Lt= independent variable
Kd1,Lst,Rt are constants
Kd2 is a parameter, should I be putting anything else as a parameter?
d=Kd1+Kd2+Lst+Lt+Rt
e=(Lt-Rt)*Kd1+(Lst-Rt)*Kd2+(Kd1*Kd2)
f=-Kd1*Kd2*Rt
T=acos(((-2*(d^3))+(9*d*e)-(27*f))/((2*((d^2)-(3*e))^0.5)]
Fsb=((2*((((d^2)-3*e)^0.5)*(cos(T/3))))-d)/((3*Kd1)+((2*((((d^2)-3*e)^0.5)*(cos(T/3))))-d))
I get this error when I do the quick check :
"Fsb = - "
Any ideas what I may be doing wrong?
Thanks alot 
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meili_yang
103 Posts |
Posted - 06/26/2013 : 4:40:53 PM
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Hi there,
Try this:
Fsb=(2*((d^2)-3*e)^0.5*cos(T/3)-d)/(3*Kd1+2*((d^2)-3*e)^0.5*cos(T/3)-d)
Meili
OriginLab Tech Support |
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LCG
Canada
9 Posts |
Posted - 06/26/2013 : 4:45:06 PM
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Nope didn't work :(
quote:
Originally posted by meili_yang
Hi there,
Try this:
Fsb=(2*((d^2)-3*e)^0.5*cos(T/3)-d)/(3*Kd1+2*((d^2)-3*e)^0.5*cos(T/3)-d)
Meili
OriginLab Tech Support
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meili_yang
103 Posts |
Posted - 06/26/2013 : 6:01:41 PM
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Hi,
I use Equations instead of Labtalk, I was able to get value when Quick Check.
Independent: x
Dependent: y
Parameters: Kd2
Constants: Kd1,Lst,Rt
Function Body:
d=Kd1+Kd2+Lst+x+Rt
e=(x-Rt)*Kd1+(Lst-Rt)*Kd2+(Kd1*Kd2)
f=-Kd1*Kd2*Rt
T=acos((-2*d^3+9*d*e-27*f)/(2*(d^2-3*e)^1.5))
y=(2*(((d^2)-3*e)^0.5)*(cos(T/3))-d)/(3*Kd1+2*(((d^2)-3*e)^0.5)*(cos(T/3))-d)
Meili
OriginLab Tech Support |
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LCG
Canada
9 Posts |
Posted - 06/26/2013 : 6:30:53 PM
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Awesome!
Thank you so much Meili :)
Have a wonderful day!
quote:
Originally posted by meili_yang
Hi,
I use Equations instead of Labtalk, I was able to get value when Quick Check.
Independent: x
Dependent: y
Parameters: Kd2
Constants: Kd1,Lst,Rt
Function Body:
d=Kd1+Kd2+Lst+x+Rt
e=(x-Rt)*Kd1+(Lst-Rt)*Kd2+(Kd1*Kd2)
f=-Kd1*Kd2*Rt
T=acos((-2*d^3+9*d*e-27*f)/(2*(d^2-3*e)^1.5))
y=(2*(((d^2)-3*e)^0.5)*(cos(T/3))-d)/(3*Kd1+2*(((d^2)-3*e)^0.5)*(cos(T/3))-d)
Meili
OriginLab Tech Support
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Problem with writing an equation