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 2d parametric van Laar equations
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kaffee_krank

1 Posts

Posted - 01/13/2014 :  1:00:13 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hello,

i want to depict: Solidus/Liquidus curve equantions for solid solution system. Its a 2d parametric presentation.

File - New - Function plot - 2d parametric function plot

Parameter t from 0 to 1

X(t) = exp{50000/8,314*(1/t-1/1000)}-1/exp{50000/8,314*(1/t-1/1000)-50000/8,314*(1/t-1/1400)}-1

&

Y(t) = exp{50000/8,314*(1/t-1/1000)}-1/exp{50000/8,314*(1/t-1/1000)-exp(1/t-1/1400)}-1

The problem: it does not work. whats my failure?





Column Value scripts

[13.01.2014 18:24:26]
incorrect number of arguments passed to function: EXP
Failed to create operation for FUNC_A due to error in Set Column Value scripts
incorrect number of arguments passed to function: EXP
Failed to create operation for FUNC_B due to error in Set Column Value scripts

[13.01.2014 18:29:13]
incorrect number of arguments passed to function: EXP
Failed to create operation for FUNC_B due to error in Set Column Value scripts
incorrect number of arguments passed to function: EXP
Failed to create operation for FUNC_A due to error in Set Column Value scripts

[13.01.2014 18:33:29]
Undefined variable: EXP_C
Failed to create operation for FUNC_A due to error in Set Column Value scripts
Undefined variable: EXP_E
Failed to create operation for FUNC_B due to error in Set Column Value scripts

[13.01.2014 18:40:04]
Undefined variable: EXP_C
Failed to create operation for FUNC_A due to error in Set Column Value scripts
Undefined variable: EXP_E
Failed to create operation for FUNC_B due to error in Set Column Value scripts

[13.01.2014 18:42:23]
Undefined variable: EXP_J
Failed to create operation for FUNC_A due to error in Set Column Value scripts
Undefined variable: EXP_L
Failed to create operation for FUNC_B due to error in Set Column Value scripts
Undefined variable: EXP_

[13.01.2014 18:57:22]
Undefined variable: EXP_
Failed to create operation for FUNC_A due to error in Set Column Value scripts
Undefined variable: EXP_
Failed to create operation for FUNC_B due to error in Set Column Value scripts


thank you for help

lkb0221

China
497 Posts

Posted - 01/13/2014 :  1:41:54 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

First, we do not use "{}" in formulas, so replace them with "()"
Second, by default, we use dot to indicate decimal digits instead of comma.

So the equations would be:
X(t) = exp(50000/8.314*(1/t-1/1000))-1/exp(50000/8.314*(1/t-1/1000)-50000/8.314*(1/t-1/1400))-1
Y(t) = exp(50000/8.314*(1/t-1/1000))-1/exp(50000/8.314*(1/t-1/1000)-exp(1/t-1/1400))-1

Another problem is, if t is from 0 to 1, there will be no data point. Actually, there will be no data until t equals to 9.
So I guess your "8,314" might be "8314"?

Anyway, there might be something else you need to fix in your formula.

Zheng
OriginLab
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